old stock valvo e188cc gold pin audio tube, warm grey mica vintagelegendary holland musicality resolve and linear listenabilitypremium 6922/e88cc upgrade! additional low end bass more rugged long life110/130 % mutual gm (100+nos/65+good)~see our other listings for alternate listening positions, bid/buy/best offer~~vintage hifidelity tone / vacuum tube pro audio / warm bright lofi hifi~~caliacoustics instagram (live) / caliacoustics dot com (soon!)~~cali acoustics~ ~6dj8 7dj8 6922 7308 / ecc88 pcc88 e88cc e188cc cv2492 cca ~~12ax7 12au7 12at7 / ecc83 ecc82 ecc81 ~ ~6bq5 el84 ~ 6267 ef86 ~ 6aq8 ecc85~ 6ca7 el34 (new!) ~preamps stereos vocals instruments mics rode k2/ntk audio technica at-4060 bluemics wooaudio liquidplatinum aesthetix cat audiotesearch arc echo ear herron decco lector manley horizons conrad frontiers pathos marantz vac psaudiobhk +more pro tone apps~

4pcs E188CC (6DJ8 E88CC E288CC) --SQ-- ADZAM - SIEMENS / RARE / GOLD PIN / M.QUAD / NOS TESTED = GOOD PARAMETERS !!! RARE !!! SPECIAL QUALITY !!! INTERNATIONAL SHIPPING FOR MINIMAL COST OUR GOAL IS TO BE BEST IN THIS BUSINESS FOR TUBES BEST PRICES !!!

2pcs E188CC (6DJ8 E88CC E288CC) --SQ-- ADZAM - SIEMENS / RARE / GOLD PIN / M.PAIR / NOS TESTED = GOOD PARAMETERS !!! RARE !!! SPECIAL QUALITY !!! INTERNATIONAL SHIPPING FOR MINIMAL COST OUR GOAL IS TO BE BEST IN THIS BUSINESS FOR TUBES BEST PRICES !!!

Fine pair of Amperex JAN 7308 gold pin tubes. Closely matched to about 4% difference between sections and tubes. From a large lot of identical tubes (as shown in the last picture), all with 1967 date codes. The codes on these two tubes have been worn off, but others from this lot are VR5 *7I or VR5*7J. Please note that youre buying only the PAIR shown here, not the entire lot. If you need more than one pair, I can list others for you. Buyers from mainland China (not including Hong Kong): due to excessive losses and delays within your postal system, I will ship to you only via UPS. You must select UPS (not USPS) from the shipping options when you purchase. NumberJAN 7308Brand on tubeAmperexActual manufacturerAmperexCountry of manufactureUSADate codessee textBox typeWhite boxesPlate styleGrayGetter styleTop-OGlass styleClearBase style9-pin miniatureTest results (measured , typical NOS)6500/6250 & 6500/6250 typical NOS is 5500/5500 Be sure to read my policies below, and contact me before you purchase if you have any questions. I have over 30 years of experience as an electronics engineer, certified electronics technician, and hobbyist, and have been collecting, buying, and selling tubes since the 1980s. Ive been an eBay seller since February of 2000. This is the only seller account I have on eBay and the pictures you see are of the actual tube(s) you’ll receive. Tubes are described, tested, and presented to the best of my ability, subject to the limitations of the equipment that I have available (Hickok 539C and 6000A). Test results are likely to differ between your equipment and mine due to many factors. Tubes are not tested for noise or microphonics. Do you have tubes to sell? Contact me with your inventory!Return Policy Unless otherwise stated in this listing, tubes may be returned within 30 days for a refund. Please keep in mind that while I do allow returns, my purpose here is to sell tubes, not to loan tubes for rolling. Any tube to be returned must: a) still bear my identification stamp. b) be in EXACTLY the same condition in which it arrived to you. Things which may invalidate a return: defaced or smudged print on the glass, bases scratched from retainer springs, cracked or damaged glass, damaged or missing boxes (where original boxes were sent with the tubes), and electrical or physical degradation from improper operation or handling. Returns which do not meet the above criteria may be refused or may be subject to partial refund. Ebays return guidelines prohibit “using or damaging an item and then returning it.” I pay for return shipping on all returns within the USA, regardless of reason. You pay for return shipping if you are located outside of the USA. If the tube arrives to you DOA or significantly not as described (SNAD) I pay for return shipping. I do not pay for return shipping for any other reason. If a tube is returned as DOA or SNAD, but does not test as such upon return, I reserve the right to be reimbursed for any return shipping cost that I paid. International buyers, please note: Import fees and taxes which you pay to your border and/or customs agency are not refundable by me under ANY conditions or for ANY reason, regardless of the reason for your return. Shipping Your tubes will be professionally prepared for shipping using all-new packing materials and will arrive to you in perfect condition. Ive been shipping tubes for many years and know how to get them to you quickly and securely. International orders ship with proper customs documentation and tariff codes to ensure that theyre processed with minimal delay upon arrival in the destination country. DOMESTIC: Unless otherwise noted, free shipping is offered on all tubes purchased with Buy-It-Now. Orders that weigh 16 oz. or less and which total $400 or less are generally shipped via the USPS First Class Package service, while orders exceeding either of those values are shipped via USPS Priority Mail. Other services are available at additional cost. If you prefer a shipping method that is not listed, please contact me prior to purchasing. I can usually ship via any USPS, FedEx, or UPS method that is applicable to your ZIP code. If you need expedited shipping (Express, Next Day, etc.) please contact me first to confirm earliest available date of shipment, as cutoff times are generally early in the afternoon. INTERNATIONAL: USPS First Class Mail: This is the least expensive option but the availability of tracking is limited in many cases. Its available worldwide for packages with a value of USD$400 or less. Be aware that First Class Mail has been known to take up to three months to reach some destinations. Customs delays are also more common with First Class. If you select the First Class option I expect that you will be patient and wait three months before requesting a refund for “item not received.” If you require faster delivery please select an option below. USPS Priority Mail: This option is available for shipments with a value less than USD$1000. It typically takes a couple of weeks to reach most destinations. UPS Worldwide Expedited: This option is available worldwide for all shipments, and is required for shipments valued at USD$1000 or more. It is fast and reliable, with end-to-end tracking. I can also usually arrange shipping with other carriers at additional cost. Please inquire before purchasing if you have specific requests. I no longer ship to Italy. I ship to China only via UPS Worldwide Expedited, regardless of value. No exceptions. Orders valued in excess of USD$2000 may be shipped in multiple packages. Dont put too much faith in eBay delivery estimates for international shipments. They are often wrong by a considerable amount. I dont use eBays Global Shipping Program (GSP) because they treat tubes as hazardous material and will confiscate them.USPS is now requiring that all addresses be in “Latin” (abcdefg) characters (this means, for example, no Cyrillic (???????) or Chinese (???), etc.). USPS will return to the me any packages which violate this guideline, and the buyer will then be required to correct the address and pay postage again. Ebay places the burden of safe delivery on sellers, so I fully insure all shipments sent outside of the USA, regardless of value. Because I can insure only up to the declared value, ALL SHIPMENTS ARE DECLARED AT ACTUAL VALUE. You might owe significant import fees on higher value shipments once they cross your countrys border – check with your border or customs agency for details. I can ship to a domestic freight forwarder or other third party within the USA, provided their address is on the order at the time you place it. GENERAL: SIGNATURE REQUIREMENT: All orders valued at USD$750 or greater, and ANY order shipped via UPS or FedEx, automatically require a signature release upon delivery. Someone at your delivery address will need to be available at the time of delivery to sign for the package. COMBINED SHIPPING: Im happy to combine shipping on multiple purchases. Those shipping within the US will combine automatically. International orders must be manually combined after the purchase, and any excess shipping will be refunded to your payment source (due to the way eBay buy-it-now items are set up, this is the only way I can combine shipping on more than one item). HANDLING TIME: My handling time is one business day and eBay requires me to ship within that timeframe. I cannot withhold shipment for a later date. If you require shipment on a specific date I can often set up a special listing just for you on that date; please inquire. I usually ship every day of the week, except for Sunday and USPS-observed holidays, and orders often ship same day. Orders placed later in the day usually ship next business day. Orders placed on Friday or Saturday will sometimes not ship until Monday. All orders placed on Sunday or USPS-observed holidays ship the next business day. Expedited and express shipments (FedEx and UPS 2-day & Next Day, etc) must be placed by 12PM Pacific Time in order to ship same day. If you have an urgent delivery need its a good idea to contact me first so I can confirm exact day of shipment. SHIP-TO ADDRESS: Ebay requires that I ship to the address on the order. This protects both you and me. I cannot ship to a different address. If you require shipment to a different address please update your shipping information before making a purchase. R28

Fine quad of Amperex JAN 7308 gold pin tubes. Closely matched to about 4% difference between sections and tubes. From a large lot of identical tubes (as shown in the last picture), all with 1967 date codes. Please note that youre buying only the QUAD shown here, not the entire lot. If you need more than one quad, I can list others for you. Buyers from mainland China (not including Hong Kong): due to excessive losses and delays within your postal system, I will ship to you only via UPS. You must select UPS (not USPS) from the shipping options when you purchase. NumberJAN 7308Brand on tubeAmperexActual manufacturerAmperexCountry of manufactureUSADate codes7L5 *7I (2) & 7L5 *7J (2)Box typeWhite boxesPlate styleGrayGetter styleTop-OGlass styleClearBase style9-pin miniatureTest results (measured , typical NOS)6000/5750 & 6000/5750 & 6000/5750 & 6000/5750 typical NOS is 5500/5500 Be sure to read my policies below, and contact me before you purchase if you have any questions. I have over 30 years of experience as an electronics engineer, certified electronics technician, and hobbyist, and have been collecting, buying, and selling tubes since the 1980s. Ive been an eBay seller since February of 2000. This is the only seller account I have on eBay and the pictures you see are of the actual tube(s) you’ll receive. Tubes are described, tested, and presented to the best of my ability, subject to the limitations of the equipment that I have available (Hickok 539C and 6000A). Test results are likely to differ between your equipment and mine due to many factors. Tubes are not tested for noise or microphonics. Do you have tubes to sell? Contact me with your inventory!Return Policy Unless otherwise stated in this listing, tubes may be returned within 30 days for a refund. Please keep in mind that while I do allow returns, my purpose here is to sell tubes, not to loan tubes for rolling. Any tube to be returned must: a) still bear my identification stamp. b) be in EXACTLY the same condition in which it arrived to you. Things which may invalidate a return: defaced or smudged print on the glass, bases scratched from retainer springs, cracked or damaged glass, damaged or missing boxes (where original boxes were sent with the tubes), and electrical or physical degradation from improper operation or handling. Returns which do not meet the above criteria may be refused or may be subject to partial refund. Ebays return guidelines prohibit “using or damaging an item and then returning it.” I pay for return shipping on all returns within the USA, regardless of reason. You pay for return shipping if you are located outside of the USA. If the tube arrives to you DOA or significantly not as described (SNAD) I pay for return shipping. I do not pay for return shipping for any other reason. If a tube is returned as DOA or SNAD, but does not test as such upon return, I reserve the right to be reimbursed for any return shipping cost that I paid. International buyers, please note: Import fees and taxes which you pay to your border and/or customs agency are not refundable by me under ANY conditions or for ANY reason, regardless of the reason for your return. Shipping Your tubes will be professionally prepared for shipping using all-new packing materials and will arrive to you in perfect condition. Ive been shipping tubes for many years and know how to get them to you quickly and securely. International orders ship with proper customs documentation and tariff codes to ensure that theyre processed with minimal delay upon arrival in the destination country. DOMESTIC: Unless otherwise noted, free shipping is offered on all tubes purchased with Buy-It-Now. Orders that weigh 16 oz. or less and which total $400 or less are generally shipped via the USPS First Class Package service, while orders exceeding either of those values are shipped via USPS Priority Mail. Other services are available at additional cost. If you prefer a shipping method that is not listed, please contact me prior to purchasing. I can usually ship via any USPS, FedEx, or UPS method that is applicable to your ZIP code. If you need expedited shipping (Express, Next Day, etc.) please contact me first to confirm earliest available date of shipment, as cutoff times are generally early in the afternoon. INTERNATIONAL: USPS First Class Mail: This is the least expensive option but the availability of tracking is limited in many cases. Its available worldwide for packages with a value of USD$400 or less. Be aware that First Class Mail has been known to take up to three months to reach some destinations. Customs delays are also more common with First Class. If you select the First Class option I expect that you will be patient and wait three months before requesting a refund for “item not received.” If you require faster delivery please select an option below. USPS Priority Mail: This option is available for shipments with a value less than USD$1000. It typically takes a couple of weeks to reach most destinations. UPS Worldwide Expedited: This option is available worldwide for all shipments, and is required for shipments valued at USD$1000 or more. It is fast and reliable, with end-to-end tracking. I can also usually arrange shipping with other carriers at additional cost. Please inquire before purchasing if you have specific requests. I no longer ship to Italy. I ship to China only via UPS Worldwide Expedited, regardless of value. No exceptions. Orders valued in excess of USD$2000 may be shipped in multiple packages. Dont put too much faith in eBay delivery estimates for international shipments. They are often wrong by a considerable amount. I dont use eBays Global Shipping Program (GSP) because they treat tubes as hazardous material and will confiscate them.USPS is now requiring that all addresses be in “Latin” (abcdefg) characters (this means, for example, no Cyrillic (???????) or Chinese (???), etc.). USPS will return to the me any packages which violate this guideline, and the buyer will then be required to correct the address and pay postage again. Ebay places the burden of safe delivery on sellers, so I fully insure all shipments sent outside of the USA, regardless of value. Because I can insure only up to the declared value, ALL SHIPMENTS ARE DECLARED AT ACTUAL VALUE. You might owe significant import fees on higher value shipments once they cross your countrys border – check with your border or customs agency for details. I can ship to a domestic freight forwarder or other third party within the USA, provided their address is on the order at the time you place it. GENERAL: SIGNATURE REQUIREMENT: All orders valued at USD$750 or greater, and ANY order shipped via UPS or FedEx, automatically require a signature release upon delivery. Someone at your delivery address will need to be available at the time of delivery to sign for the package. COMBINED SHIPPING: Im happy to combine shipping on multiple purchases. Those shipping within the US will combine automatically. International orders must be manually combined after the purchase, and any excess shipping will be refunded to your payment source (due to the way eBay buy-it-now items are set up, this is the only way I can combine shipping on more than one item). HANDLING TIME: My handling time is one business day and eBay requires me to ship within that timeframe. I cannot withhold shipment for a later date. If you require shipment on a specific date I can often set up a special listing just for you on that date; please inquire. I usually ship every day of the week, except for Sunday and USPS-observed holidays, and orders often ship same day. Orders placed later in the day usually ship next business day. Orders placed on Friday or Saturday will sometimes not ship until Monday. All orders placed on Sunday or USPS-observed holidays ship the next business day. Expedited and express shipments (FedEx and UPS 2-day & Next Day, etc) must be placed by 12PM Pacific Time in order to ship same day. If you have an urgent delivery need its a good idea to contact me first so I can confirm exact day of shipment. SHIP-TO ADDRESS: Ebay requires that I ship to the address on the order. This protects both you and me. I cannot ship to a different address. If you require shipment to a different address please update your shipping information before making a purchase. R28

2 grail grey mica siemens e188cc audio tubes, the old best versions to hear/collect period!famed for lowest distortion / low end boost over e88cc/6922 design / wettest of all siemens tones126/128 ~ 114/108 % mutual gm (100+nos/65+good) ~see our other listings for alternate listening positions! bid/buy/best offer~~vintage hifidelity tone / vacuum tube pro audio / warm bright lofi hifi~caliacoustics instagram live / caliacoustics.com (soon!)~~cali acoustics~ ~6dj8 7dj8 6922 7308 / ecc88 pcc88 e88cc e188cc cv2492 cca ~~12ax7 12au7 12at7 / ecc83 ecc82 ecc81 ~ ~6bq5 el84 ~ 6267 ef86 ~ 6aq8 ecc85~ 6ca7 el34 (new!) ~preamps stereos vocals instruments mics rode k2/ntk audio technica at-4060 bluemics wooaudio liquidplatinum aesthetix cat audiotesearch arc echo ear herron decco lector manley horizons conrad frontiers pathos marantz vac psaudiobhk +more apps~

TESTS CONDITIONS (datasheet) DUOVAC RADIOELEC (how they test it with ROETEST V10)Va=90V Vg1=-1,2V Ia=15mA (Va=100V Vg1=-1,2V Ia=17mA) HICKOK TV7D/U EV2-1030 B21 D min=50 (100%=84) EV7-6080 B21 D min=50 (100%=84)Please note that HICKOK is not a laboratory tester, though it is very well calibrated...HERE is how I calibrated mine following manual services specifications. I calibrated it to respect the low of the scale for filament... High voltage on filament would damage it...but gives higher values...0.6 (065-0.72) -->0.65V ; 1.1 (1.06-1.16) -->1.14V ; 1.5 (1.26-1.42) -->1.30V ; 2.0 (1.90-2.10) -->1.95V ; 2.5 (2.56-2.88) -->2.77V ; 3.0 (3.25-3.60) -->3.25V ; 4.3 (4.30-4.75) -->4.55V ; 5.0 (5.15-5.68) -->5.49V ; 6.3 (6.20-6.80) -->6.47V ; 7.5 (7.32-8.10) -->7.45V ; 10 (9.60-10.80) -->10.03V ; 12.6 (12.1-13.3) -->12.25V ; 20 (19.0-21.0) -->20.50V ; 25 (25.3-28.0) -->27.65V ; 35 (35.2-39.0) -->38.09V ; 50 (51.5-57.0) -->52.80V ; 75 (74.0-82.0) -->74.82V ; 117 (115-127) -->116.5VIf needed, i can share all other tests calibrations I get (129.5V/130V +o-3V ; 41.35V/40V +o-2V ; 4.21V/4V +o-1V ; 56.5V /56V....) 6331 RT LARGE RING GETTER MICA FINGER GOLD PINS 12,9/11,7 (15,6/13,5) 12,9/11,1 (15,2/12,7) 75/71 73/64 6331 RT LARGE RING GETTER MICA FINGER GOLD PINS 12,5/11,8 (15,4/14,4) 13,1/12,2 (15,2/14,3) 74/70 76/72 6331 RT LARGE RING GETTER MICA FINGER GOLD PINS 13,1/11,8 (15,7/14,2) 13,0/11,8 (15,0/13,5) 73/70 74/71 6331 RT LARGE RING GETTER MICA FINGER GOLD PINS 12,6/13,0 (14,8/15,0) 12,8/13,2 (15,0/15,1) 72/73 72/73 6331 RT LARGE RING GETTER MICA FINGER GOLD PINS 12,1/13,2 (14,4/15,9) 13,5/12,5 (15,4/14,4) 72/72 74/72 6331 RT LARGE RING GETTER MICA FINGER GOLD PINS 12,2/12,8 (14,0/14,7) 12,4/12,3 (14,4/14,5) 70/72 73/73 6331 RT LARGE RING GETTER MICA FINGER GOLD PINS 12,0/11,8 (14,1/14,2) 12,0/12,5 (14,4/14,6) 69/70 72/73 CHOOSE THE ONE YOU WANT... ASK FOR OTHER REFERENCES IF NEEDED. THE ENTIRE STOCK IS NOT ONLINE. I COMBINE SHIPPING. EUROPE COUNTRIES, YOU CAN ASK FOR MONDIAL RELAY DELIVERY SERVICE. ITS LESS EXPENSIVE THAN LAPOSTE, ASK BEFORE PAYING IF YOU CHOOSE THIS SERVICE. TUBES ARE GLASS MADE, THEY ARE FRAGILE. IF YOU SELECT A SIMPLE BUBBLE LETTER FOR THE DELIVERY, I WONT BE RESPONSIBLE IF THEY ARE BROKEN... YOU ASSUME ENTIRE CUSTOMS FEES.

TESTS CONDITIONS (datasheet) DUOVAC RADIOELEC (how they test it with ROETEST V10)Va=90V Vg1=-1,2V Ia=15mA (Va=100V Vg1=-1,2V Ia=17mA) HICKOK TV7D/U EV2-1030 B21 D min=50 (100%=84) EV7-6080 B21 D min=50 (100%=84)Please note that HICKOK is not a laboratory tester, though it is very well calibrated...HERE is how I calibrated mine following manual services specifications. I calibrated it to respect the low of the scale for filament... High voltage on filament would damage it...but gives higher values...0.6 (065-0.72) -->0.65V ; 1.1 (1.06-1.16) -->1.14V ; 1.5 (1.26-1.42) -->1.30V ; 2.0 (1.90-2.10) -->1.95V ; 2.5 (2.56-2.88) -->2.77V ; 3.0 (3.25-3.60) -->3.25V ; 4.3 (4.30-4.75) -->4.55V ; 5.0 (5.15-5.68) -->5.49V ; 6.3 (6.20-6.80) -->6.47V ; 7.5 (7.32-8.10) -->7.45V ; 10 (9.60-10.80) -->10.03V ; 12.6 (12.1-13.3) -->12.25V ; 20 (19.0-21.0) -->20.50V ; 25 (25.3-28.0) -->27.65V ; 35 (35.2-39.0) -->38.09V ; 50 (51.5-57.0) -->52.80V ; 75 (74.0-82.0) -->74.82V ; 117 (115-127) -->116.5VIf needed, i can share all other tests calibrations I get (129.5V/130V +o-3V ; 41.35V/40V +o-2V ; 4.21V/4V +o-1V ; 56.5V /56V....) 6331 RT LARGE RING GETTER MICA FINGER GOLD PINS 13,4/11,0 (15,9/13,1) 13,3/11,2 (16,1/12,8) 77/69 84/76 6331 RT LARGE RING GETTER MICA FINGER GOLD PINS 12,7/12,5 (14,9/14,4) 13,0/12,6 (15,0/14,7) 76/75 76/74 6331 RT LARGE RING GETTER MICA FINGER GOLD PINS 14,0/13,1 (16,5/15,6) 13,1/14,4 (15,8/17,0) 76/74 75/75 6331 RT LARGE RING GETTER MICA FINGER GOLD PINS 12,7/12,6 (14,8/14,5) 12,6/11,7 (14,9/14,0) 76/73 75/72 6331 RT LARGE RING GETTER MICA FINGER GOLD PINS 13,6/12,7 (15,8/14,6) 12,4/13,5 (14,5/15,8) 76/70 70/74 CHOOSE THE ONE YOU WANT... ASK FOR OTHER REFERENCES IF NEEDED. THE ENTIRE STOCK IS NOT ONLINE. I COMBINE SHIPPING. EUROPE COUNTRIES, YOU CAN ASK FOR MONDIAL RELAY DELIVERY SERVICE. ITS LESS EXPENSIVE THAN LAPOSTE, ASK BEFORE PAYING IF YOU CHOOSE THIS SERVICE. TUBES ARE GLASS MADE, THEY ARE FRAGILE. IF YOU SELECT A SIMPLE BUBBLE LETTER FOR THE DELIVERY, I WONT BE RESPONSIBLE IF THEY ARE BROKEN... YOU ASSUME ENTIRE CUSTOMS FEES.

TESTS CONDITIONS (datasheet) DUOVAC RADIOELEC (how they test it with ROETEST V10)Va=90V Vg1=-1,2V Ia=15mA (Va=100V Vg1=-1,2V Ia=17mA) HICKOK TV7D/U EV2-1030 B21 D min=50 (100%=84) EV7-6080 B21 D min=50 (100%=84)Please note that HICKOK is not a laboratory tester, though it is very well calibrated...HERE is how I calibrated mine following manual services specifications. I calibrated it to respect the low of the scale for filament... High voltage on filament would damage it...but gives higher values...0.6 (065-0.72) -->0.65V ; 1.1 (1.06-1.16) -->1.14V ; 1.5 (1.26-1.42) -->1.30V ; 2.0 (1.90-2.10) -->1.95V ; 2.5 (2.56-2.88) -->2.77V ; 3.0 (3.25-3.60) -->3.25V ; 4.3 (4.30-4.75) -->4.55V ; 5.0 (5.15-5.68) -->5.49V ; 6.3 (6.20-6.80) -->6.47V ; 7.5 (7.32-8.10) -->7.45V ; 10 (9.60-10.80) -->10.03V ; 12.6 (12.1-13.3) -->12.25V ; 20 (19.0-21.0) -->20.50V ; 25 (25.3-28.0) -->27.65V ; 35 (35.2-39.0) -->38.09V ; 50 (51.5-57.0) -->52.80V ; 75 (74.0-82.0) -->74.82V ; 117 (115-127) -->116.5VIf needed, i can share all other tests calibrations I get (129.5V/130V +o-3V ; 41.35V/40V +o-2V ; 4.21V/4V +o-1V ; 56.5V /56V....) 6331 RT LARGE RING GETTER MICA FINGER GOLD PINS 12,9/13,1 (15,1/15,7) 13,3/12,9 (15,2/14,3) 79/78 75/72 6331 RT LARGE RING GETTER MICA FINGER GOLD PINS 13,5/13,3 (15,0/15,6) 13,0/12,8 (15,2/15,3) 79/76 77/75 6331 RT LARGE RING GETTER MICA FINGER GOLD PINS 13,4/12,2 (16,2/14,5) 12,1/13,4 (14,1/15,5) 78/73 75/76 CHOOSE THE ONE YOU WANT... ASK FOR OTHER REFERENCES IF NEEDED. THE ENTIRE STOCK IS NOT ONLINE. I COMBINE SHIPPING. EUROPE COUNTRIES, YOU CAN ASK FOR MONDIAL RELAY DELIVERY SERVICE. ITS LESS EXPENSIVE THAN LAPOSTE, ASK BEFORE PAYING IF YOU CHOOSE THIS SERVICE. TUBES ARE GLASS MADE, THEY ARE FRAGILE. IF YOU SELECT A SIMPLE BUBBLE LETTER FOR THE DELIVERY, I WONT BE RESPONSIBLE IF THEY ARE BROKEN... YOU ASSUME ENTIRE CUSTOMS FEES.

TESTS CONDITIONS (datasheet) DUOVAC RADIOELEC (how they test it with ROETEST V10)Va=90V Vg1=-1,2V Ia=15mA (Va=100V Vg1=-1,2V Ia=17mA) HICKOK TV7D/U EV2-1030 B21 D min=50 (100%=84) EV7-6080 B21 D min=50 (100%=84)Please note that HICKOK is not a laboratory tester, though it is very well calibrated...HERE is how I calibrated mine following manual services specifications. I calibrated it to respect the low of the scale for filament... High voltage on filament would damage it...but gives higher values...0.6 (065-0.72) -->0.65V ; 1.1 (1.06-1.16) -->1.14V ; 1.5 (1.26-1.42) -->1.30V ; 2.0 (1.90-2.10) -->1.95V ; 2.5 (2.56-2.88) -->2.77V ; 3.0 (3.25-3.60) -->3.25V ; 4.3 (4.30-4.75) -->4.55V ; 5.0 (5.15-5.68) -->5.49V ; 6.3 (6.20-6.80) -->6.47V ; 7.5 (7.32-8.10) -->7.45V ; 10 (9.60-10.80) -->10.03V ; 12.6 (12.1-13.3) -->12.25V ; 20 (19.0-21.0) -->20.50V ; 25 (25.3-28.0) -->27.65V ; 35 (35.2-39.0) -->38.09V ; 50 (51.5-57.0) -->52.80V ; 75 (74.0-82.0) -->74.82V ; 117 (115-127) -->116.5VIf needed, i can share all other tests calibrations I get (129.5V/130V +o-3V ; 41.35V/40V +o-2V ; 4.21V/4V +o-1V ; 56.5V /56V....) 6331 RT LARGE RING GETTER MICA FINGER GOLD PINS 11,8/10,9 (14,0/12,7) 10,8/11,9 (13,7/14,5) 81/75 76/79 6331 RT LARGE RING GETTER MICA FINGER GOLD PINS 12,1/13,4 (14,7/16,2) 13,3/12,4 (15,7/14,8) 80/84 85/79 6331 RT LARGE RING GETTER MICA FINGER GOLD PINS 12,1/11,6 (15,3/13,8) 12,3/11,2 (15,0/13,4) 80/75 77/74 6331 RT LARGE RING GETTER MICA FINGER GOLD PINS 13,1/11,3 (15,3/12,8) 13,6/11,7 (15,2/13,7) 80/72 80/73 6331 RT LARGE RING GETTER MICA FINGER GOLD PINS 15,2/13,3 (17,7/15,5) 12,9/14,1 (15,3/16,6) 74/80 76/78 CHOOSE THE ONE YOU WANT... ASK FOR OTHER REFERENCES IF NEEDED. THE ENTIRE STOCK IS NOT ONLINE. I COMBINE SHIPPING. EUROPE COUNTRIES, YOU CAN ASK FOR MONDIAL RELAY DELIVERY SERVICE. ITS LESS EXPENSIVE THAN LAPOSTE, ASK BEFORE PAYING IF YOU CHOOSE THIS SERVICE. TUBES ARE GLASS MADE, THEY ARE FRAGILE. IF YOU SELECT A SIMPLE BUBBLE LETTER FOR THE DELIVERY, I WONT BE RESPONSIBLE IF THEY ARE BROKEN... YOU ASSUME ENTIRE CUSTOMS FEES.

TESTS CONDITIONS (datasheet) DUOVAC RADIOELEC (how they test it with ROETEST V10)Va=90V Vg1=-1,2V Ia=15mA (Va=100V Vg1=-1,2V Ia=17mA) HICKOK TV7D/U EV2-1030 B21 D min=50 (100%=84) EV7-6080 B21 D min=50 (100%=84)Please note that HICKOK is not a laboratory tester, though it is very well calibrated...HERE is how I calibrated mine following manual services specifications. I calibrated it to respect the low of the scale for filament... High voltage on filament would damage it...but gives higher values...0.6 (065-0.72) -->0.65V ; 1.1 (1.06-1.16) -->1.14V ; 1.5 (1.26-1.42) -->1.30V ; 2.0 (1.90-2.10) -->1.95V ; 2.5 (2.56-2.88) -->2.77V ; 3.0 (3.25-3.60) -->3.25V ; 4.3 (4.30-4.75) -->4.55V ; 5.0 (5.15-5.68) -->5.49V ; 6.3 (6.20-6.80) -->6.47V ; 7.5 (7.32-8.10) -->7.45V ; 10 (9.60-10.80) -->10.03V ; 12.6 (12.1-13.3) -->12.25V ; 20 (19.0-21.0) -->20.50V ; 25 (25.3-28.0) -->27.65V ; 35 (35.2-39.0) -->38.09V ; 50 (51.5-57.0) -->52.80V ; 75 (74.0-82.0) -->74.82V ; 117 (115-127) -->116.5VIf needed, i can share all other tests calibrations I get (129.5V/130V +o-3V ; 41.35V/40V +o-2V ; 4.21V/4V +o-1V ; 56.5V /56V....) 6331 RT LARGE RING GETTER MICA FINGER GOLD PINS 12,5/11,9 (14,9/13,9) 12,1/12,7 (13,9/14,8) 85/82 78/80 CHOOSE THE ONE YOU WANT... ASK FOR OTHER REFERENCES IF NEEDED. THE ENTIRE STOCK IS NOT ONLINE. I COMBINE SHIPPING. EUROPE COUNTRIES, YOU CAN ASK FOR MONDIAL RELAY DELIVERY SERVICE. ITS LESS EXPENSIVE THAN LAPOSTE, ASK BEFORE PAYING IF YOU CHOOSE THIS SERVICE. TUBES ARE GLASS MADE, THEY ARE FRAGILE. IF YOU SELECT A SIMPLE BUBBLE LETTER FOR THE DELIVERY, I WONT BE RESPONSIBLE IF THEY ARE BROKEN... YOU ASSUME ENTIRE CUSTOMS FEES.

Perfect matched pair of vintage Philips SQ E88CC audio tubes - Made in Holland - 1962 - Very Rare Note: If you are looking for a single Philips SQ E88CC tube instead of a matched pair, please check out our listing of 1961s Philips SQ E88CC Tube. Tube Summary The beauty, the legend, the classic, the Special Quality(SQ) - this is the super tube from Heerlens high echelon that doesnt break your bank. Known for their superb musicality and ultra low noise, thanks to Philips proprietary SQ design, these tubes remain among audiophiles top choices for serious listening. Sound Characteristics Immediately appealing is the super smooth highs offered by these tubes with lots of open air. The overall tonality of SQ is warm, musical and euphonic. The midrange displays some secondary octave nuances, which is very unique and can hardly be found even among the top-end German tubes. Similar to the Telefunken tubes, the SQs can create infinite levels of harmonic depth and a liquid sonic texture without altering the musicality of the sound. The bass on these is the clear winner of the Heerlen tubes family: articulate, accurate, deep, textured, full-bodied and powerful. The sound stage is wide and structured - it feels the dimensions of the sound shape are clearly defined no matter how it moves. Vocal representation on the SQs is close to Mitcham and Blackburn Mullard tubes in terms of warmth, sweetness and texture, making them great alternatives to Mullards as the best vocals tube. But what truly shines on SQ tubes, especially the ones from the 1960s like this pair, is their magic in portraying piano music: creamy smooth, richly colored, realistic and intimate. For many audiophiles (incl. ourselves), theyre the go-to tube for piano sound. Listening to Claudio Arraus Beethoven Complete Piano Sonatas on these tubes should be on your bucket list if you happen to be into classical piano music, but even if you are not, these tubes superb interpretation of piano music from any genre will amaze you. The ultra low noise on SQs also sets them apart from most of the high-end tubes. They dont just compete with Telefunken tubes in low noise; theyre known for being a long-term leader in low noise. As a result, you get superb detail and clarity from these tubes as well. Professional Sound Evaluation The pair worked wonderfully and sounded terrific in our professional studio setup for monitoring. - Input: Cambridge Audio CXC V2 dedicated CD transport + Schiit Audio Bifrost 2 Multibit DAC - Amplification: Liquid Platinum Tube Amplifier by Alex Cavalli - Output: Focal Clear MG Pro open-back headphones Our full tube sound review was written 100% based on the actual listening experience while this pair of tubes were running in the system described above. Professional Tube Testing Both tubes tested NOS (100%+ nominal mutual conductance) on a Mercury 2000 tube tester with the following result (mutual conductance in uMhos): Tube 1: 12,600/12,000 Tube 2: 12,600/12,700 Good tubes start at 7000 and new tubes (incl. NOS/NIB) 12,500 - 13,000, and the Mercury 2000s rated mutual conductance (nominal) for new tubes is 12,500. Test result can also be seen in the pictures. In case you wonder what all these numbers mean to your sound experience, its actually quite straightforward: mutual conductance directly translates to a tubes ability to amplify sound, so the higher the numbers the stronger. Appearance & cosmetic condition Besides the world-class sound characteristics, we still treasure this pair for its near pristine cosmetic condition given the tubes age - over 90% of the paint is still intact on both tubes, and the date codes of the Heerlen factory etched on glass are perfectly visible: delta 2G4 (delta = Heerlen, 2 = 1962, G = July, 4 = 4th week of the month)delta 2A3 (delta = Heerlen, 2 = 1962, A = January, 3 = 3rd week of the month) Shipping Policy - Ship worldwide! Flat-rate shipping (USPS First-Class) within the US. - Same business day handling. Orders placed by 2:00PM US Pacific Time on weekdays are posted on the same day, otherwise the next business day. - Combined shipping available. Please request invoice for total before making payment or receive shipping credit after order ships. - Customers outside the US please pay extra attention: International shipping is through USPS First Class Mail International by default. Its the least expensive option (even cheaper than eBay International Shipping) but may take longer than other carriers. If you prefer to use a different carrier please contact us before you buy so we can get you the correct shipping rates. Return Policy - Please READ carefully First of all, returns are acceptable as long as you are reasonable. Soundlumia sets extremely high quality standard for the products we deliver. Tubes we sell are guaranteed to work because we run professional tests and sound evaluation before they are approved for listing AND before we ship them to customers. So the defective item case doesnt exist and please do not bother trying - this type of returns will NOT be accepted without proof that tubes do not work and we will open a dispute with eBay. Sound experience is a very subjective thing, and lets be real its not that easy to run into compatibility issues between amps and tubes (so that one wont fly, either.) Please contact us to work things out before submitting return requests claiming item is defective or item not as described. We would really appreciate your respect to the professional work we have done (sourcing, testing & matching tubes, evaluating tube sound, sharing our sound experience with you, packing and shipping) to make these wonderful vintage tubes available to you at reasonable prices. Secondly, if you are a tube roller looking to game the return system, Number One STOP. Soundlumias founder is a seasoned sound professional who has advised orchestras and music studios in sound production in USA for over two decades, and knowing sound is the minimum skill requirement of our team. No tricks here please. Abusive behaviors will be reported to eBay immediately and negative feedback will be left to your account - thats guaranteed. We have already reported several abusers and eBay has ruled in our favor the dispute cases. We are more determined than ever to continue working with eBay to help rid of these unprofessional, unjustified, unkind, unfair and unacceptable abuses that are detrimental to the eBay marketplace, the vintage tubes market and the audiophile community.

2 balanced old stock special quality philips e188cc/7308 pro audio tubes, hifidelity tone!legendary dutch house resolve musicality and transparent imaging, linear tall stage great basspremium e88cc/6922 upgrade w/ more low/top end reach, more rugged design lower noiseaudio grade and full mutual gm % match 116/116~118/122 % (100+nos/65+good)authentic delta code philips! special comms grade nhk editions (rare!) ~see our other listings for alternate listening positions, bid/buy/best offer~~vintage hifidelity tone / vacuum tube pro audio / warm bright lofi hifi~caliacoustics instagram / caliacoustics dot com (soon!)~~cali acoustics~ ~6dj8 7dj8 6922 7308 / ecc88 pcc88 e88cc e188cc cv2492 cca ~~12ax7 12au7 12at7 / ecc83 ecc82 ecc81 ~ ~6bq5 el84 ~ 6267 ef86 ~ 6aq8 ecc85~ 6ca7 el34 (new!) ~preamps stereos vocals instruments mics rode k2/ntk audio technica at-4060 bluemics wooaudio liquidplatinum aesthetix cat audiotesearch arc echo ear herron decco lector manley horizons conrad frontiers pathos marantz vac psaudiobhk +more apps~

balanced old stock pinched waist e188cc/7308 audio tube, hard to find precision euphony detailunique leaf spring getter hifidelity lowest noise before distortion, rugged 6922/e88cc upgradeless ear fatigue vs dgetter?! superb for a variety of music styles vocals instruments+ultra rare collectible tele comms grade! fragile original label w/ box (not a relabel)full gm and audio test, ships worldwide! well packed, best offer always enabled ~see our other 6dj8 7dj8 12ax7 12au7 12at7 listings for alternate listening positions~~cali acoustics~ ~stereos amps vocals instruments tubemics lofi hifi rode k2 ntk and more e88cc 6dj8 ecc88 e188cc warm tone apps~ ~rodemics echo liquid platinum woo audio aesthetix cat audioresearch arc ear herron decco lector manley horizons bluemics conrad frontiers pathos vac and more~

3pcs Beijing 6N11 J Grade replace 6922 ECC88 6DJ8 E188CCTubeTV-7 Tested *** I WILL COMBINE SHIPPING COSTs ON MY ITEMS FOR SALE - SAVE BIG $$ !!! Tested to be in guaranteed working conditionI tested these on a High Quality Professonal Hickok TV-7/U Tester:TUBEs TEST RESULTs: TUBE #1: 105/97 - {Minimum Rating of 40/40 for TV-7 Testers are equal to 65% of average new ratings.}TUBE #2: 90/73 - {Minimum Rating of 40/40 for TV-7 Testers are equal to 65% of average new ratings.}TUBE #3: 71/68 - {Minimum Rating of 40/40 for TV-7 Testers are equal to 65% of average new ratings.} ** NOTE: Here a rattle at the bottom of the tube. If you have Questions or Comments contact me on eBay Check out the photos! TESTED WITH a (TV-7/U) FOR GAS, SHORTS, AND MUTUAL CONDUCTANCE! I Combine ShippingBefore You Pay. I accept PayPal and Postal M O. Please see click to enlarge photos for condition and quality.Check out My Other Items For Sale!WILL BE SHIPPED OUT FAST! Before bidding please read my shipping and return policy. I WILL COMBINE SHIPPING COST ON MY ITEMS!!! NOTE: International buyers - THE BUYER IS RESPONSIBLE FOR SHIPPING FEES. INTERNATIONAL BIDS WELCOME. I WONT CHANGE DECLARED VALUE ON CUSTOM FORMS AND INTERNATIONAL BUYERS ARE RESPONSIBLE FOR ALL TAXES, CUSTOM FEES, and additional shipping fees. NO RETURN!*TESTED ON Calibrated HICKOK TV-7 B/U*{Minimum Ratings for TV-7 Testers are equal to 65% of average new ratings.}ALL tubes will be ran through a Daniel Nelson calibrated HICKOK TV-7 B/U for a full mutual conductance test. This is a world class tester that is calibrated by the Hickok doctor. Its test results are dead on and you can buy with confidence. If you want to know what the exact Gm rating of the tube is please message me.

ECC88 6DJ8 E88CC E188CC PHILIPS HEARLEN MATCHED QUAD 2 Pcs NOS ECC88 6DJ8 E88CC E188CC PHILIPS HEARLEN MATCHED QUAD 2 Pcs NOSCode: all GAE / triangle 0K1Tested for Neuberger RPM370A,Ua=100V,Ug=-1.2V Ia=16ma=100% Ia1=16/16 mA and Ia2=17/16.mA

E88CC E188CC 6DJ8 ECC88 6922 SQ PHILIPS two stars MATCHED PAIR NOS 2pcsGold pins,10000 h,grey anode plates,D geter,testedEXTRA RARE MATCHED PAIR !!!! EXTRA TUBES GREAT SOUND!!!!!!Many e88cc tubes needed to pair this pair matched to several criteria: date of production - same series and electrical characteristics. such pairing is rare !!!All the tubes that were sold worked for 72 hours on the aging device to stabilize and in order to capture the characteristics. otherwise, in practice, some tubes quickly change the characteristics that deviate from the given values of the anode current Ia. there can be a misunderstanding. so the tubes are allowed to work 72 hours in order to get as much to their proper characteristic.They are also tested for gas, short and leakageNote: The measurements were carried out with Neuberger RPM370 saw and guarantee for this measurement. The tester has its technical and electrical characteristics that participate in the activities and measuring tubes. Each tube is a special electric circuit that works in conjunction with the saw and this gives measured values. Power saws with classic rectifier and everything else and it has its own impedance, etc ... Digital testers can not give the same measurement results as the classical tester for impedance, reactance, capacitance, conductance, the mode power supply - Switching etc .Date code: All tubes 7L4 / triangle8J and etched for glassTested for NEUBERGER RPM370,Ua=100V,Ug=-1.2V,Ig=16mA=100% Ia = 16/15mA and Ia = 16/15.5 mA

CCa E88CC E188CC 6922 SIEMENS HALSKE MUNICH GERMANY MATCHED QUAD 4 Pcs NOS Code: tubes A6 / 4G and A6 / 3I and A6 /4I and A6 / 4CO-getter,A-frame ,The chrome shieldMany e88cc tubes needed to pair this pair matched to several criteria: date of production - same series and electrical characteristics. such pairing is rareEXTRA MATCHED QUAD !!! EXTRA RARE!!!This version with gold pins is professional and allows work of 10000 hours !!!!It is very difficult to pair 4 tubes and to keep each of them balanced. Before recording the characteristics, all CC tubes are aged for 72 hours in a specially made device and then tested and selected. For these 4 tubes it took over 50 tubes to select a that, you will admit it is very difficult. and theres no need to brag about those tubes - take a look on the net and everything will be clearwhy do I have to age them for 72 hours. Since I give the electrical characteristics of the tubes and for that to be correct, the CC tubes must be forced to work for at least 48 hours in order to equalize the working mode and only then the characteristics are recorded. the current Ia measured on that occasion does not have to be 16 mA and that is 100%, they can be higher and lower, within some limits - there are some on the NET, but it is important that the triodes in the balloon tubes CCa are as uniform as possible . And thats except Ia - mA quality which is primary for me and as a third reference, if I can, give the code .its nice to be harmonized due to the later exploitation of tubes-10000 hours.They are also tested for gas, short and leakageNote: The measurements were carried out with Neuberger RPM370 saw and guarantee for this measurement. The tester has its technical and electrical characteristics that participate in the activities and measuring tubes. Each tube is a special electric circuit that works in conjunction with the saw and this gives measured values. Power saws with classic rectifier and everything else and it has its own impedance, etc ... Digital testers can not give the same measurement results as the classical tester for impedance, reactance, capacitance, conductance, the mode power supply - Switching etc . Tested for NEUBERGER RPM370,Ua=100V,Ug=-1.2V,Ig=16mA=100% two tubes Ia = 15/14 mA and two tubes Ia = 15/15 mA

E188CC E88CC 6DJ8 ECC88 6922 PHILIPS MATCHED PAIR NOS 2pcsGold pins,10000 h,grey anode plates,o geter,tested,with boxThe Philips Holland SQ E188CC / 7308 Gold Pin is the holy grail of lush 6922 tone. These are right up there with Telefunken CCa and Siemens 7308 when it comes to rarity. To our ears these sound more musical than the Siemens or Telefunken. These have a large round getter and beautiful construction.EXTRA TUBES GREAT SOUND!!!!!!EXTRA MATCHED!!!EXTRA BALANCED!!!All the tubes that were sold worked for 72 hours on the aging device to stabilize and in order to capture the characteristics. otherwise, in practice, some tubes quickly change the characteristics that deviate from the given values of the anode current Ia. there can be a misunderstanding. so the pipes are allowed to work 72 hours in order to get as much to their proper characteristic.They are also tested for gas, short and leakageNote: The measurements were carried out with Neuberger RPM370 saw and guarantee for this measurement. The tester has its technical and electrical characteristics that participate in the activities and measuring tubes. Each tube is a special electric circuit that works in conjunction with the saw and this gives measured values. Power saws with classic rectifier and everything else and it has its own impedance, etc ... Digital testers can not give the same measurement results as the classical tester for impedance, reactance, capacitance, conductance, the mode power supply - Switching etc .Date code VR7??? / delta8K? and VR7???/delta8I4Tested for NEUBERGER RPM370,Ua=100V,Ug=-1.2V,Ig=16mA=100% Ia = 16/16mA and Ia = 16/6mA

CCa E88CC E188CC 6922 SIEMENS HALSKE MUNICH GERMANY MATCHED PAIR 2 Pcs NOSEXTRA BALANCED !!! EXTRA MATCHED !!!NOS Siemens Halske CCa = E88CC 6922 Grey-Shield HOLY GRAILS 1963 and 1964ACID CODES :Code: A? 1? 3A and A? 1? 4E O-getter,one stage geter ,gray shield ,The gray shieldSTA do you think how many CCa tubes of this type needed to be measured to select this pair?MUCH MORE THAN YOU THINK !!! Probably no one in this world has a pair of CCs like this because there are NO more of them !!This version with gold pins is professional and allows work of 10000 hours !!!!It is very difficult to pair 4 tubes and to keep each of them balanced. Before recording the characteristics, all CC tubes are aged for 72 hours in a specially made device and then tested and selected. For these 2 tubes it took over 50 tubes to select a that, you will admit it is very difficult. and theres no need to brag about those tubes - take a look on the net and everything will be clearwhy do I have to age them for 72 hours. Since I give the electrical characteristics of the tubes and for that to be correct, the CC tubes must be forced to work for at least 48 hours in order to equalize the working mode and only then the characteristics are recorded. the current Ia measured on that occasion does not have to be 16 mA and that is 100%, they can be higher and lower, within some limits - there are some on the NET, but it is important that the triodes in the balloon tubes CCa are as uniform as possible . And thats except Ia - mA quality which is primary for me and as a third reference, if I can, give the code .its nice to be harmonized due to the later exploitation of tubes-10000 hours.They are also tested for gas, short and leakageNote: The measurements were carried out with Neuberger RPM370 saw and guarantee for this measurement. The tester has its technical and electrical characteristics that participate in the activities and measuring tubes. Each tube is a special electric circuit that works in conjunction with the saw and this gives measured values. Power saws with classic rectifier and everything else and it has its own impedance, etc ... Digital testers can not give the same measurement results as the classical tester for impedance, reactance, capacitance, conductance, the mode power supply - Switching etc . Tested for NEUBERGER RPM370,Ua=100V,Ug=-1.2V,Ig=16mA=100% tubes Ia = 20/19mA and Ia = 19/20 mA

SIEMENS E188CC/6922 same code GREY PLATTE 0 disc getterValves are tested. I have a HICKOK TV-3C/U tube tester .The measurements are of mutual conductance.The measures are REAL and are the average of five measurements.The object is to get the picture. The 100% of the tube is equal to 2500 micromhos.TUBE A 2000/2100 TUBEB 1800/1950 The valves were selected and output coupled at the following frequencies 20, 56, 125,320,750.2 k, 5 k, 12 k, 20.2 k. See the photos Attention please Read the following carefully before making purchases. I do not accept the return of the object for any reason. I repeat no reason. If your intention is to buy you must accept this condition. At the end of the auction do not make the payment. I will send you photos of how your valves will be packed. If you think the packaging is insufficient You can ask for the cancellation of the transaction that will be accepted by me.

Perfect matched & balanced pair of vintage Amperex USN-CEP 7308 audio tubes w/ Gold Pins - Made in USA (1964) - Strong NOS - Very Rare Tube Overview Built and tested according to military specs of the US Navy, Amperex USN-CEP 7308 has been rated one of the most reliable 7308/E188CC tubes known to the world: its quality is more than premium, although it doesnt carry the aweing PQ label like its more expensive siblings do; its performance is superb and in fact very few tubes in this price range can claim to be stronger; its low noise should only by judged by the most experienced sound experts because we are talking about the very tube built for and certified by the US Navy for mission-critical communication devices; its sound signature is phenomenal (I dont use this word very often to describe tube sound) and many audiophiles consider the Holy Grail (75 Reflektor 6N23P) the only possible upgrade path to go from here. Sound Qualities The clarity and sound detail on USN-CEP 7308s are second to none. These tubes deliver the same resolution and grip you get from the best German and Dutch tubes from the same league(7308/E188CC.) These tubes have a clean, incisive presentation, but are also euphonic and musical. Like the HGs they put all the differing and competing attributes together in one excellent package. As a result, theres no one area they are weak in so you can use them for most listening occasions - music, monitoring or movie watching. The sound stage is not only wide but also deep so every listening experience feels like at a live concert. The instrument separation is not done as beautifully anywhere else, as one would expect from tubes this quiet. The top end is smooth and airy and theres absolutely no brightness or harshness. The midrange presentation is very similar to the Amperex Holland 7308/E188CC tubes - large, expansive and transparent - with added thickness in the upper midrange, which makes your sound warm and intimate, especially on the vocals. The bass delivery is world-class, as one should expect from a military tube at this level of the game: accurate, full-bodied, dynamic and always present. Professional Sound Evaluation The pair worked wonderfully and sounded terrific in our professional studio setup for monitoring. - Input: Cambridge Audio CXC V2 dedicated CD transport + Schiit Audio Bifrost 2 Multibit DAC - Amplification: Liquid Platinum Tube Amplifier by Alex Cavalli - Output: Focal Clear MG Pro open-back headphones Our full tube sound review was written 100% based on the actual listening experience while this pair of tubes were running in the system described above. Appearance & cosmetic condition This pair is so rare because about 95% of the inscription (Amperex brand, Made in USA print and PQ logo) is intact. The identical date code etched on glass is perfectly visible on both tubes: VR5 *4D (* = Amperex New York, 4 = 1964, D = April.) Professional Tube Testing Both tubes tested Strong NOS (110%+ GM) on a Mercury 2000 tube tester with the following result (mutual conductance in uMhos): Tube 1: 14,000/13,900 Tube 2: 14,000/13,800 Good tubes start at 7000 and new tubes (incl. NOS/NIB) 12,500 - 13,000, and the Mercury 2000s rated mutual conductance (nominal) for new tubes is 12,500. Test result can also be seen in the pictures. In case you wonder what all these numbers mean to your sound experience, its actually quite straightforward: mutual conductance directly translates to a tubes ability to amplify sound, so the higher the numbers the stronger. Shipping Policy - Ship worldwide! Flat-rate shipping (USPS First-Class) within the US. - Same business day handling. Orders placed by 2:00PM US Pacific Time on weekdays are posted on the same day, otherwise the next business day. - Combined shipping available. Please request invoice for total before making payment or receive shipping credit after order ships. - Customers outside the US please pay extra attention: International shipping is through USPS First Class Mail International by default. Its the least expensive option (even cheaper than eBay International Shipping) but may take longer than other carriers. If you prefer to use a different carrier please contact us before you buy so we can get you the correct shipping rates. Return Policy - Please READ carefully First of all, returns are acceptable as long as you are reasonable. Soundlumia sets extremely high quality standard for the products we deliver. Tubes we sell are guaranteed to work because we run professional tests and sound evaluation before they are approved for listing AND before we ship them to customers. So the defective item case doesnt exist and please do not bother trying - this type of returns will NOT be accepted without proof that tubes do not work and we will open a dispute with eBay. Sound experience is a very subjective thing, and lets be real its not that easy to run into compatibility issues between amps and tubes (so that one wont fly, either.) Please contact us to work things out before submitting return requests claiming item is defective or item not as described. We would really appreciate your respect to the professional work we have done (sourcing, testing & matching tubes, evaluating tube sound, sharing our sound experience with you, packing and shipping) to make these wonderful vintage tubes available to you at reasonable prices. Secondly, if you are a tube roller looking to game the return system, Number One STOP. Soundlumias founder is a seasoned sound professional who has advised orchestras and music studios in sound production in USA for over two decades, and knowing sound is the minimum skill requirement of our team. No tricks here please. Abusive behaviors will be reported to eBay immediately and negative feedback will be left to your account - thats guaranteed. We have already reported several abusers and eBay has ruled in our favor the dispute cases. We are more determined than ever to continue working with eBay to help rid of these unprofessional, unjustified, unkind, unfair and unacceptable abuses that are detrimental to the eBay marketplace, the vintage tubes market and the audiophile community.

3pcs Beijing 6N11 J Grade replace 6922 ECC88 6DJ8 E188CCTubeTV-7 Tested *** I WILL COMBINE SHIPPING COSTs ON MY ITEMS FOR SALE - SAVE BIG $$ !!! Tested to be in guaranteed working conditionI tested these on a High Quality Professonal Hickok TV-7/U Tester:TUBEs TEST RESULTs: TUBE #1: 105/97 - {Minimum Rating of 40/40 for TV-7 Testers are equal to 65% of average new ratings.}TUBE #2: 90/73 - {Minimum Rating of 40/40 for TV-7 Testers are equal to 65% of average new ratings.}TUBE #3: 71/68 - {Minimum Rating of 40/40 for TV-7 Testers are equal to 65% of average new ratings.} ** NOTE: Here a rattle at the bottom of the tube. If you have Questions or Comments contact me on eBay Check out the photos! TESTED WITH a (TV-7/U) FOR GAS, SHORTS, AND MUTUAL CONDUCTANCE! I Combine ShippingBefore You Pay. I accept PayPal and Postal M O. Please see click to enlarge photos for condition and quality.Check out My Other Items For Sale!WILL BE SHIPPED OUT FAST! Before bidding please read my shipping and return policy. I WILL COMBINE SHIPPING COST ON MY ITEMS!!! NOTE: International buyers - THE BUYER IS RESPONSIBLE FOR SHIPPING FEES. INTERNATIONAL BIDS WELCOME. I WONT CHANGE DECLARED VALUE ON CUSTOM FORMS AND INTERNATIONAL BUYERS ARE RESPONSIBLE FOR ALL TAXES, CUSTOM FEES, and additional shipping fees. NO RETURN!*TESTED ON Calibrated HICKOK TV-7 B/U*{Minimum Ratings for TV-7 Testers are equal to 65% of average new ratings.}ALL tubes will be ran through a Daniel Nelson calibrated HICKOK TV-7 B/U for a full mutual conductance test. This is a world class tester that is calibrated by the Hickok doctor. Its test results are dead on and you can buy with confidence. If you want to know what the exact Gm rating of the tube is please message me.

3pcs Beijing 6N11 J Grade replace 6922 ECC88 6DJ8 E188CCTubeTV-7 Tested *** I WILL COMBINE SHIPPING COSTs ON MY ITEMS FOR SALE - SAVE BIG $$ !!! Tested to be in guaranteed working conditionI tested these on a High Quality Professonal Hickok TV-7/U Tester:TUBEs TEST RESULTs: TUBE #1: 105/97 - {Minimum Rating of 40/40 for TV-7 Testers are equal to 65% of average new ratings.}TUBE #2: 90/73 - {Minimum Rating of 40/40 for TV-7 Testers are equal to 65% of average new ratings.}TUBE #3: 71/68 - {Minimum Rating of 40/40 for TV-7 Testers are equal to 65% of average new ratings.} ** NOTE: Here a rattle at the bottom of the tube. If you have Questions or Comments contact me on eBay Check out the photos! TESTED WITH a (TV-7/U) FOR GAS, SHORTS, AND MUTUAL CONDUCTANCE! I Combine ShippingBefore You Pay. I accept PayPal and Postal M O. Please see click to enlarge photos for condition and quality.Check out My Other Items For Sale!WILL BE SHIPPED OUT FAST! Before bidding please read my shipping and return policy. I WILL COMBINE SHIPPING COST ON MY ITEMS!!! NOTE: International buyers - THE BUYER IS RESPONSIBLE FOR SHIPPING FEES. INTERNATIONAL BIDS WELCOME. I WONT CHANGE DECLARED VALUE ON CUSTOM FORMS AND INTERNATIONAL BUYERS ARE RESPONSIBLE FOR ALL TAXES, CUSTOM FEES, and additional shipping fees. NO RETURN!*TESTED ON Calibrated HICKOK TV-7 B/U*{Minimum Ratings for TV-7 Testers are equal to 65% of average new ratings.}ALL tubes will be ran through a Daniel Nelson calibrated HICKOK TV-7 B/U for a full mutual conductance test. This is a world class tester that is calibrated by the Hickok doctor. Its test results are dead on and you can buy with confidence. If you want to know what the exact Gm rating of the tube is please message me.