Members sillypuddy Posted April 3, 2013 Members Share Posted April 3, 2013 I bought a new Deluxe Reverb Reissue last year, it sounds great but has a little low sounding hum, not real bad but noticeable. More than I think it should, more than my other amps. I think it is coming from the power tranny, on stanby you can hear it just a little and thats seems normal, but as the amp warms after a few minutes of playing you can hear it more. As far as I can tell it isn't a tube, I tried replacing the tubes with other tubes, ones I know are good to see if it would go away or get worse, no change. FYI, I think the tubes that came with this amp are relabled JJ's with Groove Tube logo's. I switched the rectifier tube with a Weber SS replacement, Still no change. Ideas? Link to comment Share on other sites More sharing options...
Members strtdv Posted April 3, 2013 Members Share Posted April 3, 2013 Are you in Europe? If so then part of the problem might be the tremolo controller. Rather than using an old-fashioned optocoupler, the european version of the amp uses a complicated digital controller to comply with regulations for cadmium levels. This circuit adds a lot of noise. Removing it and putting an optocoupler in its place cures the problem. Here's what should be in the circuit: And here's what Fender used instead for the european market: Link to comment Share on other sites More sharing options...
Members sillypuddy Posted April 3, 2013 Author Members Share Posted April 3, 2013 Thanks for the reply. No that isn't it. It has the optocoupler in it. And the first thing I did was to fix the tremolo, install a .001 mf cap to reduce the tick. That worked good, but I may go to a .002 to smooth it out a little more. I've owned allot of Fender amps in the last 50 years, this is my first reissue, most were CBS and a few were originals. None had this hum. Link to comment Share on other sites More sharing options...
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