Coral Stentor 100 help!
Hi, First post, helping a friend. Trying to repair the amp and I have a schematic. However, the transistor numbers don't make sense. I cannot figure out what a "9138" or a "3155" really are. Anybody been down this road? I think the 3155 is bad, since it fails on a transistor tester as Si or Ge, PNP or NPN.
The schematic shows the 3155 as PNP, and I can probably guess on acceptable parameters for the transistor specs, and finally, since the transistor was made in 1967 (mfgr date code), I'm guessing it is Germanium. So, I could hope I'm right and find something close, but it could get costly. Any ideas from the more knowledgeable folks?