EL37 MULLARD FAT BOY ENVELOPE
Wowee, a lovely EL37 here today for you to try n buy. Rarely offered yet oft desired this is the big envelope 'fat boy' style.
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 = 90 mA; gm = 10.0 mA/V
As you can see, these results are slightly lower than nominal but should give superlative performance in Push-Pull output applications.