stevem Messages: 4733 Registered: June 2004 Location: NY
Senior Member
3 ways to go about this without a Transistors matching / testing rig.
1) get a fist full of 2n3055 Transistors and install them one at a time while measuring and noting the D.C. Voltage on the speaker jack with no speaker hooked up .
The lowest D.C. Voltage seen will be a decent combination of matched Transistors.
The other way is to just buy 2 matched pairs of NTE130MP Transistors .
The 3rd way is that some folks offer a matching srervice that you can find online.