Oldskoolfan's latest activity

Many folks think that since the B+ and B- voltages are +/- 80V that they only need outputs that can handle 80V Vce. Wrong! Each has to...

I’d replace all of them with fresh across the board. That popping was actually ticking… of a time bomb.

Took a chance and hooked up to my cell phone for input and a pair of cheap test speakers - All seemed well for about 15 minutes then I...

Took the DBT out of the circuit and brought it up on the variac. Rail volts are 75.4vdc and -75.4vdc Left channel bias at .475vdc...

I've got plenty of like drivers if that might be dragging down the rail voltage. Will the bias voltage be valid at this point? With the...

Well, I fired it up on my DBT just to see.... didn't blow any fuses, DBT worked like it should. No magic smoke. All seemed well so I...

You tend to get the hang of it after your first 30-40 backplane boards…

Hexis22, that's some NASA level soldering there!

Doug, I've read the whole thread over and your prose is very non-confrontational. Nothing to worry about there. And believe me...

Hi Doug This group is not bashful and would have criticized if it was due. So far your work looks very good. Nice solder joints and...

Dnspy007, You will really enjoy this build. Your 400 is a great one to start with, very clean. Be forewarned though, these...

By the way, anybody got a top panel they want to get rid of? Only issue is the top panel is missing.

Got another Linda today. Beautiful condition. Nary a scratch on the face. Seller said she is blowing fuses. Has 3 service tags on it...

10 amp with a big, black knob on top....

I would, it might prevent you from smoking expensive output transistors