MULLARD EL37 PENTODE, BROWN BASE, WHITE PRINT Wowee, a lovely EL37 here today for you to try n buy. Rarely offered oft desired but here to sell today
Against the nominal AVO specification for 100% emission of :-
Ia =100 mA; gm = 11.0mA/V @ Va = 250V; Vg = -15V
Obtained results were:-
Device 1: Ia = 99 mA; gm = 10.5 mA/V
As you can see, these results are slightly lower than nominal but should give superlative performance in Push-Pull output applications.