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Installing IC Sockets
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Kay 703-C View
the
Repair
60-Cycle AC Hum

This Kay 703-C guitar amp arrived in the shop with a low-level hum in the background.

Kay 703-C Guitar Amp, Front

Hum can mean that one or more filter capacitors are worn out in the power supply.

This would let a 60 Hertz ripple get past the power supply and into the amplifier.

 

Kay 703-C Guitar Amp, Rear
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