6EM7 GE Amperex NOS 1970”s (2.4ma/34ma)

6EM7 GE Amperex NOS 1970”s

2.4ma Gm=2200

34ma Gm=6000

Tested on Amplitrex

Good Ma Triode 1 = 1.5ma Gm=1500

Good Ma Triode 2 = 30-40ma Gm=6000-7000

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)