Tested on a fully restored TV7-DU, by Dan Nelson, pictures of evidence for this included in the listing. Tubes are tested for shorts. PC= Plate Current DC= Date Code Please note, TV7 data minimum is equal to 60%. For example, (insert model number here) min value 60. If the tube tests at minimum 60, that is equal to 60%. The number over (/) is the minimum test data result as described in the TV7 DU tube testing manual. So 60/ (min) 60 = 60% 52.3/30 PC 5.8 slightly loose top cap 50/30 PC 5.5 slightly loose base I mark all my tubes, so please dont waste your time seeking to send me back your old dead tubes. All testers read differently. I have sought to have my tester as accurate as possible. I will not be giving partial refunds because you have received different test result. All tubes will be shipped well, an example of how I pack is pictured in the listing. (obviously these tubes are not included) I wont be lying on a customs form I combine shipping. If the tubes are of significant value, the postage will be extra due to insurance.

Tested on a fully restored TV7-DU, by Dan Nelson, pictures of evidence for this included in the listing. It was restored and calibrated on October 21st 2021. Tubes are tested for shorts. PC= Plate Current DC= Date Code Please note, TV7 data minimum is equal to 60%. For example, (insert model number here) min value 60. If the tube tests at minimum 60, that is equal to 60%. The number over (/) is the minimum test data result as described in the TV7 DU tube testing manual. So 60/ (min) 60 = 60% strong testing slightly loose top hats 1. 47.5/30 PC 5.3 2. 47/30 PC 5.1 I mark all my tubes, so please dont waste your time seeking to send me back your old dead tubes. All testers read differently. I have sought to have my tester as accurate as possible. I will not be giving partial refunds because you have received different test result. All tubes will be shipped well, an example of how I pack is pictured in the listing. (obviously these tubes are not included) I wont be lying on a customs form I combine shipping. If the tubes are of significant value, the postage will be extra due to insurance. If the valves sell for significant money, additional insurance shipping charges will be applied. Combined postage available

Tested on a fully restored TV7-DU, by Dan Nelson, pictures of evidence for this included in the listing. It was restored and calibrated on October 21st 2021. Tubes are tested for shorts. PC= Plate Current DC= Date Code Please note, TV7 data minimum is equal to 60%. For example, (insert model number here) min value 60. If the tube tests at minimum 60, that is equal to 60%. The number over (/) is the minimum test data result as described in the TV7 DU tube testing manual. So 60/ (min) 60 = 60% Rare matched pair one tube top cap is slightly loose, hair line crack in base 53/30 PC 5.9 53/30 PC 5.8 I mark all my tubes, so please dont waste your time seeking to send me back your old dead tubes. All testers read differently. I have sought to have my tester as accurate as possible. I will not be giving partial refunds because you have received different test result. All tubes will be shipped well, an example of how I pack is pictured in the listing. (obviously these tubes are not included) I wont be lying on a customs form I combine shipping. If the tubes are of significant value, the postage will be extra due to insurance.

Tested on a fully restored TV7-DU, by Dan Nelson, pictures of evidence for this included in the listing. It was restored and calibrated on October 21st 2021. Tubes are tested for shorts. PC= Plate Current DC= Date Code Please note, TV7 data minimum is equal to 60%. For example, (insert model number here) min value 60. If the tube tests at minimum 60, that is equal to 60%. The number over (/) is the minimum test data result as described in the TV7 DU tube testing manual. So 60/ (min) 60 = 60% 1. 22/30 PC 2.4 2. 23.2/30 PC 2.5 I mark all my tubes, so please dont waste your time seeking to send me back your old dead tubes. All testers read differently. I have sought to have my tester as accurate as possible. I will not be giving partial refunds because you have received different test result. All tubes will be shipped well, an example of how I pack is pictured in the listing. (obviously these tubes are not included) I wont be lying on a customs form I combine shipping. If the tubes are of significant value, the postage will be extra due to insurance.

One STC 4310A (Western Electric U.K.) measures almost 100% @44/30 in my Hickok TV-7 B/U tester, about NOS. Play-tested in WE 91A replica SET, WONDERFUL sound! Firm socket, no rattles, no lose glass inside et al. Getter looks very good. You only buy what you see in pics. Ship worldwide. Please note, EVERY tube tester (namely Hickok TV-7) might test different from mine, there is NO guarantee that you get exactly the same test results. If you disagree, DO NOT BID!

STC 4310A mesh plate measures @60/30 in my Hickok TV-7 B/U tester, hence better than NOS. Play-tested in WE 91A replica SET, WONDERFUL sound! Firm socket, no rattles, no lose glass inside et al. Getter looks very good. You only buy what you see in pics. Ship worldwide.

One STC 4310A mesh plate measures @60/30 in my Hickok TV-7 B/U tester, hence better than NOS. Play-tested in WE 91A replica SET, WONDERFUL sound! Firm socket, no rattles, no lose glass inside et al. Getter looks very good. You only buy what you see in pics. Ship worldwide.

One STC 4310A mesh plate measures @60/30 in my Hickok TV-7 B/U tester, hence better than NOS. Play-tested in WE 91A replica SET, WONDERFUL sound! Firm socket, no rattles, no lose glass inside et al. Getter looks very good. You only buy what you see in pics. Ship worldwide.

STC 4310A mesh plate measures @60/30 in my Hickok TV-7 B/U tester, hence better than NOS. Play-tested in WE 91A replica SET, WONDERFUL sound! Firm socket, no rattles, no lose glass inside et al. Getter looks very good. You only buy what you see in pics. Ship worldwide.

One STC 4310A mesh plate measures @60/30 in my Hickok TV-7 B/U tester, hence better than NOS. Play-tested in WE 91A replica SET, WONDERFUL sound! Firm socket, no rattles, no lose glass inside et al. Getter looks very good. You only buy what you see in pics. Ship worldwide.