Hello and greetings from Germany,
bought a Trace Elliot 1215 combo-amp yesterday off Ebay quite cheap, just 50€.
It's GP12, 200W, Series 6.
Everything works quite fine, BUT: there's a 50Hz cycle noise in the speaker all the time, even when master is turned down and no instrument connected.
Bought the manual online, took the amp apart. It's divided into a preamp- and a poweramp-board and even with the preamp-board disconnected the hum is still there, so i think it's the poweramp-board that causes the noise.
There's just a very minor hum-voltage on the 4700uf main capacitors which i think is unlikely to cause the hum, but i ordered a new pair anyway.
Any other ideas or experiences ?
Thank you,
Ralf