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hi , ive been getting this high pitched squeal in my krankenstein when ever i start turning up master 2, gain or the sweep knobs, i have tried changing the preamp tubes one at a time with no luck, the power tubes were done (prior to me buying it) with Ruby 6L6's.... this only happens on the dime channel. have tried the amp in multiple places with multiple cables and guitars....any idea what the issue could be? thanks.
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It might be a bad decoupling capacitor on that channel.
Check for gross ripple on the preamp plates.
If you have a high voltage cap handy you could try clipping across any that are suspect. -
It's a design error. Many manufacturers of high gain amps leave the oscillation in the amp and sell it to poor unsuspecting people like you.Originally posted by dirtrocking View Post
Changing tubes does not fix the problem. However, a good tech could add snubber caps and the problem will be cured.
There's all kinds of amps out there with the same problems, factory installed defects.Comment
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What a load of bull. Your so sure there is no fault whatsoever in this amp so it must be a design flaw. Have you personally looked at this amp or are you just using your psychic abilities?Originally posted by soundguruman View Post
The problem is not that there are so many "factory installed defects" (as you constantly claim), rather there are too many self anointed "guru's" who would rather add parts or modify an amp than repair it because they can't track down the real fault.Originally posted by Enzo
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so when runnin through a thd hot plate today i noticed that when i use my tube screamer or a guitar loaded with active pickups it disappears....ground issue? ive heard grounding the input to the chasis is a common repair and fix to this problem among several high gain heads....what do you think? talked to tony "krank" today and if i cant resolve it by grounding to chasis, then i am going to send it back to him and have him refurbish it himself. thanks for all the help!
btw this thing sounds KILLER, seems to have more gain and a fuller sound than my 5150 II,,,,,,,and that amp is amazing as well!Comment
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Were you able to get thru to Krank? I have one here with a blown PT and they never return my calls.Comment
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Tony "Krank" has a new amp company called STiFF amps, you can go on their website and get contact info, or you can email tony directly at tonykrank@yahoo.com ..........Also, Krank amplification is now defunct, time to start taking care of these GEMS!Comment
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thanks! i actually noticed when running through an attenuator at super high volume/gain that if i use a guitar with active pickups and/or use my tubescreamer in the front end the problem goes away completely......grounding issue maybe? i have heard that with these amps and several other high gain amps that grounding the input directly to the chassis is a common fix to the problem.....any thoughts on that?Comment
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Thanks!!Comment
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