Two, Tung Sol USA 5U4GB, Matching Pair, 1950 ' S, 5U4GA/5U4G Equiv
Item History & Price
| Reference Number: Avaluer:51304767 | Model: 5U4GB |
| MPN: 5U4GB | Country of Manufacture: United States |
| Brand: Tung-Sol | Type: NOS Tube |
Two, new in original box, Tung Sol USA 5U4GB tubes. These are obviously, vintage, US made Tung Sol tubes and not the modern day Russian made reproduction/re-issue of Tung Sol tubes. The 5U4GB tube can of course be used in applications calling for the 5U4G and 5U4GA tubes. Black plates, dual getter/dual upper silvering. Tested on a Hickok TV-3 military tester that has been calibrated, just to make sure. Firm bases, excellent silvering. Tubes test at 168-167 and 167-166 ...where pass/fail is 80. These are relative numbers and do not indicate percentages. Tubes have the same exact structure inside and out, having date codes of "322NH3" and "322PY3", mid 1957 and late 1959. The photos show reflections on the bakelite bases, they are no usage scratches.Many other lots of tubes for sale this week.Shipping is free within the continental US. Elsewhere- exact postage only, no packing fee.
