6EA7 GE black base rebranded Zenith 1960 used/good (3.6ma/35ma)

6EA7 GE black base rebranded Zenith used/very good 1960

3.6ma Gm=2600 (triode)

36ma Gm=5450 (pentode)

Tested on Amplitrex

Good Ma Triode = 1.5ma Gm=1500

Good Ma Pentode = 40ma Gm=6500

for:

Joule Electra LA-100 MK3
Modwright power supply
Wright Sound phono wpp-200c
Wright Sound WLA12A preamp
Kenji Mizushima Kenso
Music Reference 6EM7 amp
Welbourne Apollo mono amps (KR/VAIC VV52B or 300B output tubes)