Those were also my go to semis when making test fixtures for production electronics. Those and ua741's
Dan Kahn
On Tuesday, November 19, 2024 at 06:27:08 PM EST, wn4isx via groups.io <wn4isx@...> wrote:
I made a small fortune, OK small fortune to a high school student, building quasi-complimentary guitar amps. By today's standards they were pretty awful but, for the 1966~1970, probably not so bad.
This is close to the circuits I used, the exact semiconductors depended on what I could obtain, but the 2N3055 was standard. I built several with 2 per upper and lower and one (shudder, it had a nasty habit of oscillating about 30KHz, took me a month to tame) with 4 upper and lower.
I've used 2N3055 for every thing from power amps to pass elements in linear supplies. I even built sliced the tops off 2N3055 that failed the Vce breakdown test and used them as "solar cells". They'd produce about 0.6V @ 10mA. [Yea how powerful.]
I used "boatloads" of 2N3055, 2N22222, 2N2977 and even more 1N4004s.? ?
