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FDP Forum / Fender Amps: 1985 - Current / DRRI buzz

Contributing Member


All I need is one more guitar
Jan 9th, 2019 01:00 PM   Edit   Profile  

My DRRI started buzzing as soon as I plug anything into it.
I tried different cables
I looked at and tapped on the power tubes and all seems OK.

Is this when I should try replacing preamp tubes?

FDP Data Goon

I am still

the reason for the season!
Jan 9th, 2019 02:04 PM   Edit   Profile  

When in doubt, swap them with your backups.

You have backups, right?

(i.e. even if it's not the problem, and you don't have some, get 'em!)

Past that, I'd try different outlets/locations/whatnot as well.

Lug it to a music store to "Test some guitars" or effects they have in stock. Does it do it there?

Or at a friend's? Etc.

Contributing Member

Ocala, Florida

pwn me like it's 1999
Jan 9th, 2019 02:07 PM   Edit   Profile  

Maybe a bit more info too. Buzz, as in no other sound but the buzz? It's quiet when volume is up but nothing else plugged in? Same result with the single coil/humbuckers listed in your profile?

Contributing Member


All I need is one more guitar
Jan 10th, 2019 07:15 AM   Edit   Profile  

The amp is quiet with volume up but nothing plugged in.
Buzz starts when i plug anything in, even a patch cable without guitar.
With a guitar plugged in the buzz stops when i zero the volume on the guitar or the amp.
Happens on both channels, all 4 inputs.
Maybe i should try the amp in a different wall outlet.
All advice is helpful


Too Near Atlanta GA

Amp Tech Emeritus
Jan 23rd, 2019 11:44 AM   Edit   Profile  

Sounds somewhat atmospheric or due to some type of appliance or RF emitting device or circuit in the proximity of the amp. Try the amp in a different location and see if the symptom persists.


FDP Forum / Fender Amps: 1985 - Current / DRRI buzz

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