Ceriatone Stray Cat 30 Issues

[bal704]

The humdinger fixed it:

https://tubeamparchive.com/viewtopic.ph ... c&start=60

I unhooked my 6.3V Xfmr tap for the heaters, and powered up the heaters with a 6V lantern battery to see if it eliminated the hum, which it did. That's how I isolated it down to something with the heaters.

Hello, im having the same issue, buzz when master is engaged, the clean channel works good! i doubled checked everything and there is no mistake to the wiring!
did u solve your problem?
thanks in advance

[billyz]

What's with the 47 ohm resistor on one leg of the pilot lamp?

[Phil_S]

Edit: Oh, never mind. I see you fixed it.

[zelenko]

tried >( the same hum does not go away any other clue? i measuerd all voltages from the schematics and they ar all the same +- few volts!

[bal704]

DId you try the lantern battery or humdinger?

tried >( the same hum does not go away any other clue? i measuerd all voltages from the schematics and they ar all the same +- few volts!

[zelenko]

Humdinger and also two 100ohm resistors. i have already had a center tapped heating! lifted it tried these two metods and nothing!