The fact that a 2SB718 is a totally different transistor than a 2SD718.OK so what am I missing here ?
The fact that a 2SB718 is a totally different transistor than a 2SD718.OK so what am I missing here ?
.. you could see they are pulls from units by the condition of the leads ..
Define 'does not work'.Stay tuned for the (smoke test) power up .. just a hint ... does not work with the diode and pot in it ..
I've never built it, I only posted a schematic that I thought ought to work.
Look something like this?
Popping is usually a sign of a failing transistor. I'd power up on a 100W DBT (for safety's sake) and use some freezespray to hit some of the transistors and diodes one-by-one and see what it does to the noise. And remember that these devices in this schematic are really the least likely to have such problems...there's a bunch more semiconductors on that factory PC board,
I'd be careful about shooting the input FET with freezespray, as offset will go bonkers for 15 seconds or so.
Ha! Missed your reply a month ago. Yep...a bit of a stutter-step there. Fixed...The trimmer should be between base and emitter, Glenn did a double base-collector. Oops.
Craig