Question about Fender Hot Rod Deluxe Guitar Combo Amplifier

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I've got a Honey Laquer(tweed) deluxe.Bought it new about three years ago. While it's powered up, there's a whine sound coming out, almost like a mid frequency feedback that doesn't change with the volume on clean channel and sometimes goes away temporarly with the drive channel buttom in but it comes right back. Gets louder with the master volume though on drive channel. Played maybe 30 gigs with it but never roughed up or dropped. Any help would be great. Phil at pcarias@carolina.rr.com

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I suspect a bypass capacitor for the preamp section has failed. It needs to go to the shop and be tested with an oscilloscope to pinpoint the problem.

DO make sure the feedback is NOT from something you have plugged into it... make sure it is there with NO input cable plugged in. Often external devices can introduce ground loops an noise like this. Lamp dimmers (even stage lighting dimmers) can be a source of interference.

The sound you hear MAY not be the full loudness as the oscillation MAY be above your hearing range. This COULD cause overheating and damage so get it fixed before using.

Posted on Oct 05, 2009

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