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Description
374A Western Electric gray plate used/good 1966
1) 17.2ma Gm=3100
Tested on Amplitrex
Vplate=135V
Vscreen=135V
Vgrid=-18V
Good used Ma range = 17-21ma
Good used Gm range = 2800-3000
(374A specs: Vfil=3V @ 530ma, Vplate=135V, Iplate=18ma, Mu=210, Gm=3000, Rp=70K ohms, Pout=1.3 watts)
