EF12 Telefunken Germany used/tests like new, stamped top 1940's (sold out)
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EF12 Telefunken Germany used/tests like new, stamped top 1940's
3.4ma
Gm=2300
Tested on Amplitrex
Vplate=250V
Vscreen=100V
NOS Iplate=3.0mA
NOS Gm=2100
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