Matched Pair JJ 6BQ5 EL84 6P14 6P14P Vacuum Tubes With Boxes March 28 2023 This Tung-Sol 0B3 / OB3

This Tung-Sol 0B3 / OB3 tube tested to spec on our Paul Hart-calibrated TV7/U

excellent flashing and what appears to be a US Navy logo on the base

new in box Zenith 6LE8 tube tested to spec on our Paul Hart-calibrated TV7/U

Sorry about the nibbled corner

Matched Pair JJ 6BQ5 EL84 6P14 6P14P Vacuum Tubes With Boxes March 28 2023 This Tung-Sol 0B3 / OB3This matched pair of JJ 6BQ5 EL84 6P14 6P14P output tubes was tested on our Maxi Matcher 2 with 325 volts on the plates and a bias of 14 volts for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 7440 micromhos for Tube One and 7400 for Tube Two. Plate current draw was 29. 5 and 30. 7 milliamps, respectively. (New EL84s typically test from the mid 20s to mid 30s with transconductance from 7000 micromhos.) These