Paleo-Electronics

Clueless Idiots and High Voltage Vacuum Tubes Really Do Mix!

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Entries Tagged as 'Cap Can'

Replacing the Cap Can

February 20th, 2012 · 8 Comments · Amp Repair, Medalist Debug

The first things to go generally on these old amps is the power filter capacitors and these are often all rolled into one single ‘Cap Can’. Here’s mine in place in a GA-5 Medalist. These are (IIRC) wax paper and foil capacitors and are sealed with wax. It is electrolytic but has a single ground […]

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Debugging the Medalist – Power Supply Filtering

March 28th, 2011 · 2 Comments · Amp Repair, Medalist Debug

As you might recall from two posts ago (“Scoping the Power Supply”) we were unable even to scope the power supply ripple at TP3 and saw a hideous deformed thing at TP5. The lack of filtering certainly indicates that C4A (the 20μF from the cap can) was blown. Since that big funky cap can itself […]

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