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Amplified Parts
+  Ceriatone Forum
|-+  American Style
| |-+  BF Champ, Vibro Champ
| | |-+  squeling tremolo
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Author Topic: squeling tremolo  (Read 3700 times)
palehorse
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« on: October 02, 2008, 04:34:57 AM »

Hi, i'm a new guy at the forum.

I recently bought a used vibro champ and it sounds lovely, but the tremolo makes a loud squealing noise when i turn it on.  I can turn the noise off when using the foot switch, but i can get it back by turning the intensity back.  (when on full the squeal is gone, but passing twelve on the way down it comes on again)  My first guess is to change the tremolo tube, but if any of you guys have some suggestions on where i should start i would be very glad.

It is also a hum that i would like to get rid of, any suggestions on what to look on would be great.
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wyatt
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« Reply #1 on: October 02, 2008, 05:38:19 PM »

Original Vibro-Champ?

If it's a real Fender, it's old; replacing the filter caps will fix the hum.  It'll also tighten up the bottom end and really add some punch back into the tone.

The 12AX7 tube closest to the 6V6GT power tube controls the tremolo.  if you have a spare, swap it out, otherwise try swapping the two 12AX7's. 

If it is an old Champ, then it may be time for retube anyway.

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palehorse
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« Reply #2 on: October 03, 2008, 04:52:39 AM »

no it's not a fender, it's an orginal Ceriatone  Grin

I've tested with new tubes, but that didn't help.  I got a tip to replace one of the electrolytes (i don't know if that's the correct english term...) I get my soldering iron and post here if it helps.

thanks anyway.

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mrkly
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