Not sure about the history of this amp, but I'm guessing a master volume was installed in the external speaker jack at one time, then removed. The preamp had also been hacked up a little bit, but nothing major. I believe the transformers were original, but the appeared to have been removed at some point.
I reverted the circuit to stock, replaced the electrolytic capacitors, and tidied up some of the spaghetti, glue, and burnt wiring. I also added some voltage spike protection features, and installed a power amp input jack so the owner could use it as a slave amp.
