(!!!) 6EM7 IEC Servicemaster by Hitachi Japan NOS 1968 (1.1ma and 47.5ma)
By Tube World
$ 18.99
6EM7 IEC Servicemaster by Hitachi Japan gray plates NOS 1968
1.1ma Gm=1500
47.5ma Gm=6700
Tested on Amplitrex
Good Ma Triode = 1.4ma+ Gm=1500
Good Ma Pentode = 35-40ma Gm=6000-7000
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)
See more: vacuum tube
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 6EM7 IEC Servicemaster by Hitachi Japan NOS 1968 (1.1ma and 47.5ma) "Pin It")