Magnatone M8 from back in the day. These were made in 1963 and 1964. Has two channels with reverb and vibrato. Vibrato is special because it uses a varistor that by production process and composition does not behave at all like varistors of today. You can mimic this type of vibrato design but the sound cannot truly be copied without the varistor of the era. It has a very unique sound. There is an excellent technical article on this by Tim Robbins that describes this vibrato circuit and why it is unique — Magnatone Vibrato Design
The top pops off and all the electronics are on one side of the chassis while all the tubes are on the other. All components are mounted to tag strips or to the tube sockets or pots.
Power supply is propped up on the left of the chassis but it actually sits at the bottom of the enclosure screwed down into the cabinet. Amp had a torn speaker, AC cord inlet was broken, and had a wrong tube in the 12DW7 position. It’s basically an untouched old relic but it still works once these little problems were tackled.
Magnatone M8 schematic. Like a lot of old gear the schematic is pasted inside the chassis so a service person can reference it one day.
The magnatoneamps.com site has a wealth of knowledge on this and other Magnatone amps. More info and better schematic for the Magnatone M8 here.
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