*Serviced* Sony TA-8650 VFET Integrated Amplifier | Works Flawlessly !!. If youre looking at this ad, chances are you know what youre looking at. This thing is a beauty! It was just serviced by one of the best technicians in town. All service notes are available in the photos. The amp was working prior to the work, most thing that were done were preventative. He spent over 10 hours working on it, as well as letting it play for 5 days to ensure there are no problems whatsoever. What youre getting is a perfectly functional rare amplifier that any collector would be proud to own! We will be extremely diligent when it comes to shipping this unit. Box will be padded with thick foam sheets, and the unit will be wrapped in so much bubble wrap that it will be nearly impossible to see it through the layers. Full insurance coverage is included for peace of mind of both parties. Signature will be required upon delivery. The wood paneling on the side is swappable, if you wanted to change for a different color panel or repaint the current one, its quite easy to do. *** Send us an offer, we respond to them very fast! *** All of our items have been tested (if applicable), and are in working condition unless stated otherwise. The main items on the pictures are the exact items you will be receiving. In the case of a listing with a stock quantity, they will be in very similar condition. We strive to fully satisfy all of our customers. If an item were to arrive Defective on Arrival (DOA), we will issue a full refund of the item unless the item was sold in As is condition. Once a purchase is completed, the item will be shipped within 2 business days. Customer service is our top priority: We work hard to ensure every buyer is satisfied with their purchase. Our reputation is the most valuable thing to us. Please do not leave negative feedback, contact us directly should you have any issues with your purchase and we will make it right! :) As it is against eBay policy to ship to a different address than the one associated to your eBay account, please ensure your shipping details are up to date before confirming a purchase. Thank you for choosing us, we are a small family-run online store and your business means the world to us :) Feel free to contact us if you have any questions about an item prior to purchase and we will get back to you within 1 or 2 waking hours.

First Watt ClassA amplifier VFET. Limited edition of 200 units. Like new condition. US only.

This is probably Sonys best VFET integrated amp, the very rare TA-F7. A phenomenal piece from the glory days of Japanese audio design. The amp has been serviced, mostly to protect the amp and especially the VFETs against failure. - The output cascode BJTs (common failure point on these) were replaced with modern D44H11/D45H11. - The fusible resistors were replaced with superior modern replacements. The originals are known to drift. - High quality Bergquist silicone thermal pads for the VFETs. - General maintenance/servicing—bias adjustments etc. One thing we overlooked was the VU meter bulbs—they need to be replaced. At some point, you could also fully recap it—my tech considers full recaps very much optional, so he didnt do it. Some caps were replaced in the power supply though. Cosmetic condition is very good with only a few small marks. I think its a nice example overall. Its a 100V unit so youll need a stepdown transformer. Local pickup or Ill ship it safely packed with lot of protection. I can ship it internationally—message me for a shipping quote.

The C-1 Preamplifier seems to be exceedingly rare. If you’re been looking for one of these, now‘s your chance to experience this engineering masterpiece and its signature VFET sound! Here’s a snippet from a review:‘…Like the B-1 V-FET masterpiece, the C-1 is one of the few preamplifiers that became an instant landmark in audio design. Inside All-FET, with small-signal V-FETS in some of its stages, constant-current / constant-load / current-mirror / fully-stabilized ±100V / ±33V EQ section, metal film, styrol and mylar caps, separate amp for headphones and a 4-gang volume control. Front Variable loudness, acoustic & presence tone shaping plus regular bass/treble with 2-position center/turnover frequencies for all, 4-frequency tone generator plus pink noise position, front pre-out and tape i/o, MIC inputs, 6-position phono impedance trims for inputs 1 & 2 (separately !), pre-out or rec-out meters switch with attenuator - and then some. Back Three phono inputs, three tape loops, three line inputs, input level trim pots for all, three pre-outputs, one input to use the meters with an external source, one oscillator output with level pot.” Note this is the original 100v model from Japan, so you’ll want to use an adapter (transformer) which I’m including in this sale. Happy to answer any questions, take additional pictures, etc.I will package this like an overprotective parent (see my feedback as a seller) to ensure it arrives safely! If you live in AK or HI, there will be a shipping surcharge depending on the carrier - message me for details. Check my feedback and buy with confidence!

Introducing the Sony TA 4650 VFET, an exceptional audiophile integrated stereo amplifier that delivers an unparalleled sound quality. This rare and fully serviced piece of audio equipment boasts 2 channels and a variety of audio inputs including AUX, Phono/Turntable, and Stereo L/R RCA. The brand, Sony, is synonymous with quality and this model, in particular, is highly sought after by music enthusiasts. This is TRULY RARE! FULLY SERVICED !! NOT BASIC SERVICED WITH JUST SWITCHES AND CONTROLS CLEANED UNIT. Here is what has been done to give you and idea! How this is different from all others : The full service took nearly two month to complete!. 1. Power supply completely rebuild with NEW better than orginal electrolytic capacitors including the two large main 4700uf/50v capacitors , all capacitors are quality nichicon FG , UKA, UKT made specially for audio use . The coupling capacitors are German WIMA film capacitors . These capacitors are used in only the finest audio components . Every single diode and transistor and resistors replaced with quality new ones again better then the tired old ones . The power supply had the double diode mod in place of D413 the center of this diode tied to the common ground power supply for rock steady +- 55 source voltage for the VFETs. Bourn and vishay precision multi turn 2.2k potentiometers installed in power supply board and F power amp driver board . All transistors on power amp board are new. The 2SA705 transistors replaced with BC556B transistors in differential amp and closely matched in hfe gain for ultra low DC OFFSET. 2. There are 3 infamous double diodes in The F power amp These are also called death diodes as they are know to take out the precious VFETs when they go out of order without any reason , these death diodes have be replaced with twin 1N5148 diodes for each of these diodes. THIS IS A MUST DO IN ANY SERVICE OF ANY SONY VFET AMP! PERIOD! Just cleaning the switches and controls is not enough! All electrolytic and almost all coupling capacitors are new on this board , the power supply and the various pre amp board . The 4X 0.47ohm/5w power resistors on power amp board are new quality vishay ones. 3. J113 N channel JFET transistors installed in place of 2SK24A in pre amp for superior sound , the phono section has2 original Sony minature 2SK63 VFETs for truly awesome phono sound from your quality turntable . 4. New Teflon wires installed were necessary. 4X new 470 ohms resistors in headphone board . The speaker relay points cleaned and polished . All controls and switches cleaned for maximum performance . 5. The four VFETs are original vintage SONY all tested . Before VFETs were installed the DC bias adjust pots were adjusted to show maximum voltage reading in this case +- +- 79 to +- 80Vdc on each gate of eachVFET. 6. So much work was done that it would take a book to list all , the above is just a digest of things done. NOTHING WAS LEFT TO CHANCE! To bring you a truly exceptional SONY TA 4650 RARE VFET Amp. As you might already be knowing VFET transistors were developed by Sony to sound like a vacuum tube sound without the heat of a vacuum tube . THEY ARE RARE AND HIGHLY SOUGHT AFTER AS THEY HAVE WARM MAGICAL MIDRANGE SOUND WERE MOST OF THE MUSIC IS . This fully serviced unit sound SIMPLY SOUND AWESOME ! I have a video in the listing with sound of bob Jane’s fantastic live jazz music track called” TOPSIDE” PLAYING from my apple ipad the headphone socket of the iPad connected with a custom made monster cable with mini stereo headphone connector on one end and the other end having left /right RCA standard phono male connectors which then connected to AUX 1 of the amp. The phono section was also tested with a quality vintage Sony PS 1800 A Historic vintage professional belt drive turntable with pitch control . The sound again truly superb with great stereo separation and details in music. There is some cosmetic wear which to be expected after 40 years since new in form of scratches in chrome of the front panel and a bend in the gray metal top cover rear left bottom corner and some cosmetic wear in gray finish and in the bottom side which was touched with matching gray paint . None of these distract from it good looks as can be seen in the video any many high resolution pics. The power Indicator bulb is blue led which is much better looking and long lasting then the regular bulbs Whether you are a novice or an experienced audiophile, the Sony TA 4650 VFET is a must-have addition to your home audio system. With its powerful and clear sound, this integrated amplifier is perfect for listening to your favorite music, watching movies, or playing video games. Don't miss out on the opportunity to own this exceptional piece of audio equipment. It will be packed well for safe arrival. YOU WILL ????LOVE IT! NICE! FRIENDLY! AND SERIOUS! BUYERS ONLY! Thanks for your PURCHASE! and for your BUSINESS! , both of which are GREATLY APPRECIATED!!You are a VALUED! CUSTOMER.

For Sale one vintage (1975-1977?) Sony TA-4650 in proper Euro spec (not Japanese / US 110v version) One could write reams on the benefits of Static induction transistors or Vertical Field effect transistors (V-Fets). Just do an internet search if thats new to you. (Too expensive to produce & too hard to use, seems to have been their death knell) But... V-FETs - Sony went off and developed a transistor that worked like a Valve/Tube = Result a transistor amp that sounds like a tube amp! So these are *bit* famous for their musicality, among other things. Only problem is, theres getting less and less of them because some common diodes in the associated circuit have a tendency to die, taking the whole merry show with them. Actually, Sony went off and re-invented the wheel several times. Not only is the Output stage V-fet; so is the phono stage, very specifically aimed at turntable users (I am not one) but the 2sk79s are similar to an ECC88 - So you get the idea by now... This amp has been subject to a full restoration. Documented on DIYAudio but in summary: Those diodes replacedElectrolytic caps replacedClippy speaker terminals changed for banana typesFilm caps in the signal pathPSU centre grounding Changes associated with the Dutch service bulletinPotentiometers CLEANED Above all, re-biasing of the output devices I cant post the link to the article dont think, (even though I wrote it) so message me for a link if interested. The TA-4650 is very similar to the TA-5650 but without the paralleled output devices (2SK60 & 2SJ18), so lower power, but potentially cleaner sound. TBH I cant tell the difference Downside - see photos of top edge of the facia, I hadnt really seen these, but not mint externally. Any questions please ask, this is already a long ad Andy The inevitable small print. (Please do read this before bidding, as unfortunately it can be necessary to spell this out) More information? Firstly, if you want any more info then please ask as many questions as you like before bidding, I want the winning bidder to be happy with their purchase. BiddersWe all have to start somewhere, so I welcome bids from people with 0 feedback but please e-mail me first so i know youre a real, live person. Same goes if you have a lot of negative feedback. Buy it now?If there is a buy-it-now price it means you can buy the item now (do it) ,If not then the auction will run its course once a bid has been placed. Please respect other e-bayers and don’t PM me with an offer unless the auction is set up that way. Non payersDon’t. It’s not clever, and I have to report it to e-bay to recover listing fees. Payment:Payments managed by e-Bay. Cash / Personal cheque / PO is fine but until the funds are successfully cleared the item remains my property and won’t be sent. As with most people I appreciate prompt payment of whatever type but insist that it’s made within 7days unless agreed. If you are mailing your payment please let me know Postage:I always send with insurance. No exceptions. It doesn’t add that much but covers everyone in the event of a mishap. I aim to post as soon as possible after cleared payment but sometimes working gets in the way. Worst case should be the Saturday after payment. Mostly itll be sent Parcelforce 48, or similar. Never seem to make any money on shipping Destinations:UK only. Why? because postage even to Europe is horribly expensive, complicated by customs and would be undertaken at your risk. I will not ship this item outside of “Europe” under any circumstances. Hey by all means ask just dont be offended when I ignore your message :) Warranty:No warranty is expressed or implied. I am a private individual, not a shop. I simply do not have the resources to back up any warranty. Take a look at my feedback I’m not here to rip anyone off. If you have any doubts ask questions before buying Im very happy to provide extra details. Returns:As with warranty, Returns are not accepted. All goods are checked for function before they are sent and serial numbers noted. Please bear this in mind when bidding. Feedback:In the unlikely event of the buyer having any problems please contact me BEFORE leaving feedback.

I bought this amp “as-is”. When I tried testing it, the amp sounds great on the left channel, but right channel doesn’t get very loud, and has distortion. I haven’t been able to test every feature, but the volume pots all seem to work smoothly with no static. I’ve carefully checked the VFETs (keeping them in their original matched pairs) and they test fine. I don’t know enough about working on VFET amps to feel comfortable going any further, so I’m listing this as parts/repair. Let me know if you have any questions! Check my feedback and buy with confidence! Note: If you live in AK or HI, there will be a shipping surcharge, message me for info. Note: This is the 100v model, so you’ll want to use an adapter. Note: I will package this very securely, so it arrives safely.

On Offer one Fantastic Sony VFet 4650 This is orginal totalyand has the Orginal Vfets as shown with matching rank numbers If you are looking at this you know what I am on about This is totally orginal it does need the VD1221 changing It works well sounds well stunningly good The control are nosie ( balance ) but its not been used for a time Condition is good has a few marks but still very nice example THIS IS A COLLECTION IN PERSON ONLY I Will NOT PACK IT FOR ANY COURRIER COLLECTION So you can hear it working on collection and be happy with it Now becoming very rare The Vfets are not available so they alone are worth the money but you know that ... Any Questions Please Ask A very nice machine -Fet is the acronym for the newly developed vertical type field effect power transistors used in the TA-4650 amplifier.A V-Fet has extremely low output impedance and excellent high power capability, delivering an output current proportional to input voltages and assuring virtually distortion free amplification.Use of the V-Fets in the power output stage results in a quality of reproduction hitherto not available to audiophiles. SpecificationsPower output: 30 watts per channel into 8? (stereo)Frequency response: 10Hz to 100kHzTotal harmonic distortion: 0.05%Damping factor: 45Input sensitivity: 2.5mV (MM), 150mV (line)Signal to noise ratio: 70dB (MM), 90dB (line)Output: 150mV (line), 17mV (DIN), 1V (Pre out)Speaker load impedance: 4? (minimum)Semiconductors: 4 x VFET, 4 x FET, 36 x transistors, 26 x diodesDimensions: 460 x 168 x 323mmWeight: 12.4kg

On Offer one Fantastic Sony VFet 4650 This is orginal totalyand has the Orginal Vfets as shown with matching rank numbers If you are looking at this you know what I am on about This is totally orginal it does need the VD1221 changing It works well sounds well stunningly good The control are nosie ( balance ) but its not been used for a time Condition is good has a few marks but still very nice example THIS IS A COLLECTION IN PERSON ONLY I Will NOT PACK IT FOR ANY COURRIER COLLECTION So you can hear it working on collection and be happy with it Now becoming very rare The Vfets are not available so they alone are worth the money but you know that ... Any Questions Please Ask A very nice machine -Fet is the acronym for the newly developed vertical type field effect power transistors used in the TA-4650 amplifier.A V-Fet has extremely low output impedance and excellent high power capability, delivering an output current proportional to input voltages and assuring virtually distortion free amplification.Use of the V-Fets in the power output stage results in a quality of reproduction hitherto not available to audiophiles. SpecificationsPower output: 30 watts per channel into 8? (stereo)Frequency response: 10Hz to 100kHzTotal harmonic distortion: 0.05%Damping factor: 45Input sensitivity: 2.5mV (MM), 150mV (line)Signal to noise ratio: 70dB (MM), 90dB (line)Output: 150mV (line), 17mV (DIN), 1V (Pre out)Speaker load impedance: 4? (minimum)Semiconductors: 4 x VFET, 4 x FET, 36 x transistors, 26 x diodesDimensions: 460 x 168 x 323mmWeight: 12.4kg

Ich biete hier meinen Vintage-High-End Vollverstrker von Sony an. Fantastischer Klang, der auch von neueren Gerten kaum erreicht wird. Kann natrlich gerne vorgefhrt werden. Der Verstrker befindet sich optisch in einem neuwertigen Zustand. In diesem Zustand drfte es weltweit keinen zweiten geben. Das Terminal fr Speaker A wurde auf Bananen-Buchsen umgebaut. Original natrlich noch vorhanden und kann bei Bedarf wieder ohne Beschdigung zurckgebaut werden. Technisch absolut einwandfrei. Hier kratzten keine Regler oder Tasten. Alle Eingnge/Ausgnge funktionieren perfekt. Lieferumfang: Sony TA-8650 Neupreis ber 3.000.- DM (1978) Privatverkauf - Keine Rcknahme - Keine Gewhrleistung Versand nur innerhalb der BRD! Am besten natrlich Abholung!

SONY TAN-5550 VFET Endstufe & TAE-5450 Vorverstärker. Bei der Vorstufe funktioniert leider die (Tone) Klangregelung nur auf einem Kanal (Ein Kanal geht der andere ist leiser). Ohne Klangregelung funktioniert die Vorstufe einwandfrei. Sonst alles andere funktioniert. Phono Eingänge usw. Es wurden alle Elko‘s getauscht also die Vorstufe wurde recapt (Alle Nichicon Muse usw. ca 50 Stuck sind getauscht) Ich bin sicher das man die Klangregelung reparieren kann. Die Lampe in dem Ein/Aus Knopf leuchtet nicht. Die Endstufe funktioniert und klingt sehr gut, wurde aber nicht recapt. Es wird empfohlen die zu überholen. Die Geräte sind für das alter in gutem Zustand. Privatverkauf. Keine Garantie. Kein Umtausch oder Rückgaberecht.