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I have got a H&K Trilogy head with an hard problem of microphonicity and feedback on the clean channel. I replaced all the tubes with new and NOS without results. I think in a bad filter cap but i need the schematic. I wrote to H&K Italian distributor but it's silent :-( Can anyone help me please?
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Life is difficult, play hard! -
...anyone?Life is difficult, play hard! -
I hope you gave them more than four minutes in the middle of the night to respond...
Try contacting H&K direct instead of the distributor.
If microphonics is the problem, power up the amp on the bench, and use a wooden chopstick or similar insulated object and tap on parts inside teh amp, looking for whatever might be sensitive.
bad filter caps usually result in hum, rather than microphonics.Education is what you're left with after you have forgotten what you have learned.Comment
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a quick search lists this thread
http://music-electronics-forum.com/t11947/
redneckgeek may still be around, cant hurt to try emailing him at the address in his post, and also PM the others who have asked for the sch to be sent to them, they may have it.Comment
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