marconiins: TF2604 (TF 2604); Electronic Voltmeter

Tube Equivalents for the M8136, a Special Quality tube for critical application: CV4003, 6189, E82CC;   while the ECC82 = 12AU7 is close to it, but of lesser quality for such application.

Für diesen Post bedanken, weil hilfreich und/oder fachlich fundiert.