RCA etc. ONE (1) 6A8G Pentagrid Converter tNOS TESTED Vacuum Tube black or grey glass 6A8 Audio 1935-1945
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This listing is for One (1) 6A8G Pentagrid Converter 6A8 vacuum tube in the ST (Coke Bottle) tube shape. It has a black bakelite octal base, nickel plate, and bottom getter. Labels in stock include RCA, Raytheon, NU, Zenith, Philco, Ken-Rad. If you're looking for a particular brand, please message right as you order - we pack and ship quickly!
Your tube has been fully tested on our Knight 600A tube tester with like new, NOS results (tNOS). Here's what that means: to qualify for this listing, several stringent conditions must be met: the emissions for each section must test within between 80% and 120% of bogey values, consistent with original 1935 RCA, Sylvania, GE, and/or Tung-Sol datasheet specifications for new tubes of this type. The tube must also show no shorts, no open elements, and no measurable heater-cathode leakage. The tube might have mechanical wear or have the label rubbed off - these are very old! Unbalanced and used-testing tubes are available in a separate listing at a significant discount. Every tube you receive from Sound By Doc is guaranteed against failure for 60 days after purchase, an industry extreme!
OPTIONS (use offer feature in Reverb):
Want a regular white box? $1 extra per tube
Want the test results recorded on your box, too? $3 extra per tube
Want two tubes that match one another within 5% for emissions and GM? $5 extra per tube
Most of our tubes are tested with one of our Amplitrex AT1000 tube testers, but these fantastic testers do not have built-in support for this tube type. Therefore, this type is tested on our Knight 600A tube tester from 1969. Most vintage testers use a proportional emissions test at 30VAC and extrapolate to real, working voltages, but not this one! The Knight tester is revered for its 250VAC, real-world emissions test and for its robust gas test. Since we have not calibrated your tester, we cannot guarantee that the test results on your tester will be the same.
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| Listed | 4 years ago |
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| Condition | Very Good (Used) Very Good items may show a few slight marks or scratches but are fully functional and in overall great shape.Learn more |
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