2x BRIMAR 12BH7 Valves

Date Code: 4L5/585 (1955), 4G5/585 (1955)

Tested by AVO VCM Tester


Valve 1
Ia1 = 12(mA), gm1 = 3.2(mA/V)
Ia2 = 13.4(mA), gm2 = 3.3(mA/V)

Valve 2
Ia1 = 10(mA), gm1 = 2.9(mA/V)
Ia2 = 10.5(mA), gm2 = 3.1(mA/V)


NOS specification: Ia = 11.5(mA), gm = 3.1(mA/V)


*** This valve has also been tested in amplifier without any noise. ***



Postage Costs
I am happy to post this item to worldwide and combine postage cost on multiple purchases.
















20260803L006