6BQ5 Cathode Bias

[bobloblaws]

I have a Kent Model A-60 amp here, I'm guessing built sometime in the '60s. Unfortunately, no schematic. My tube tester showed the 5Y3 rectifier as very weak...

[kelcy]

Does anyone know of a good electric paraffin wax heater to use for potting? All the ones I've found are for cosmetic use and it looks like they're intended...

[Don Ho]

I have a conn amp that I decided to acquire for conversion to a guitar amp. I had been communicating with a builder/converter in Ohio through emails but...

[HansVG88]

I built a 5f1 champ type amp and because it had hum issues I used a twisted pair heater from the 6.3 volt PT (green) wires. There was no center tap from the...