[TinCanAlley]

Originally Posted by DaveWM

diode check base to collector check it like a diode
diode check base to emitter check it like a diode
Ohm check emitter to collector should read open both ways (switch leads).

if if doubt just do a you tube search on checking transistors with DVM there are plenty of demos.

I use a analog meter that has a built in reversing switch in the resistance mode.

Got it. So now I must wonder why the transistor I replaced on the NOS horizontal board doesn't work in the board, but checks out good when tested. I've gone back and forth with it a few times in the board and it sure doesn't work. The transistor from the old horizontal board works perfectly.

I know I'll get it. I've made quite a bit of progress and gained quite a bit of knowledge in the past month.

Thanks