5 US-Made 50B5 Vacuum Tubes Valves NOS NIB Lot Of Five January 19 2026 Transconductance measured 4100/3400 micromhos

Transconductance measured 4100/3400 micromhos

These mesh plate National Union number 78 tube were tested on our Paul Hart-calibrated TV7/U for shorts

1 milliamps' plate current / 1220 micromhos

These twelve twist-on

If you need robust EL34s

5 US-Made 50B5 Vacuum Tubes Valves NOS NIB Lot Of Five January 19 2026 Transconductance measured 4100/3400 micromhosThese five new old stock, new in box US made 50B5 tubes tested to spec on our Paul Hart calibrated TV7 U. BECAUSE OF THE BIZARRE, INTRUSIVE AND DRACONIAN GERMAN PACKAGING REGULATIONS AND THE SEVERE FINES AND PRIVACY INTRUSIONS ASSOCIATED WITH THEM WE NO LONGER SHIP TO GERMAN ADDRESSES. WE WILL HAPPILY SEND YOUR PACKAGE TO A NEIGHBORING COUNTRY OR MAKE SUITABLE ARRANGEMENTS. IN 2021 WE PURCHASED 150,000 VACUUM TUBES. IF IT'S NOT LISTED, WE PROBABLY