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Two, new in box, Tung Sol 5U4GB tubes. These are of course vintage, US made Tung Sol tubes and not the modern-day Russian made reproduction/re-issue Tung Sol branded tubes. The 5U4GB can be used in all applications calling for the 5U4G, 5U4GA, and 5U4GB. Black plates, dual-upper getter, top silvering, white printed logo base. Tested on a Hickok TV-3 military tester that has been calibrated, just to make sure. Firm bases, excellent silvering. Tubes test at 167-165 and165-164 where pass/fail is 80. These are relative numbers and do not indicate percentages. Tubes have the same exact structure inside and out, having matching date codes of \"322RR3\", November of 1960.
Many other lots of tubes for sale this week.
Shipping is free within the continental US. Elsewhere- exact postage only, no packing fee.
