I've got a couple Valvo OC74 transistors, both not to bad on leakage.... No a lot of info I've found for them, tho. A couple of old posts on diysb
concerning using them in a rangemaster.
I wanna throw one in a tonebender for q3. Usually I've only noticed folks staying with the tried and true combos for TB circuits.
Since I only have a bunch of Russian GT403'S and some crazy oddball germanium's from antique radios handy, I figured I'll be the guinea pig.
Thoughts about the valvo, anyone?
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As long as the gain is the right range and the leakage is right (you don't want it too low in a TB), then go ahead and rock it. You're probably using a socket anyway, right? :)
Most of the OC7x series is pretty good, but I do prefer the black glass ones in general over the metal bullets as the leakage is consistently better on the later construction.
Thanks, Jon.
Tested with the keen germanium setup, so leakage is not too good, but not too bad either . HFE is near 110, so I'm going with 65, 75, 110. I'll experiment from there
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