• From: Qc,Canada
  • Registered: 2009-01-24
  • Posts: 27

Topic: Little Trouble with my rivera fandango

There's a noise who come occasionnaly from my rivera fandango 2X12 combo amp. IT's a kind of crepitements or something  like a popcorn or a bad radio frequency. It can be hour and hour without appear and suddenly appear and I don't know why. It's all new preamp and power tube, all new weld and the noise still appear. Someone can help me ???

I don't believe in psychology....I believe in good move - Robert James (Bobby) Fischer
  • From: N. Little Rock, AR.
  • Registered: 2007-03-02
  • Posts: 463

Re: Little Trouble with my rivera fandango

Are the Tubes seated fully into their sockets?

     Are there other electronic items in the room? Computers, etc.? There could be some "interference" happening.

    Sometimes dirty Input and Output Jacks, or Potentiometers can make noise from dirt and dust.

    Even brand new Tubes can be bead. Ditto for Solder Joints. There could still be a cold/broken solder joint, even though the amp is new. Especially after shipping.
    Sometimes, there's even a bad part. A bad resistor or capacitor, etc. Not as common, but it does happen.

    Is the speaker wire fully connected, at both ends?

    Is there a ground lift switch? If so, try it's center position, first. Then, try up and down positions.

Early 80's 1957 U.S. Vintage Reissue Stratocaster (Surf Green)-Warmouth Soloist  Pearly Gates Neck, Pearly Gates Bridge- Larrivee D-03 (Mahogany/ Spruce)
Carmen Ghia Head- Marshall 112 Cab W/G12H 30  or  Custom 4 X 6v6 Head  or  Budda Twinmaster Plus Head-Traynor 212 Cab w/Eminence Texas Heats. 
Mo'D-Eternity-Blues Pro- Timmy-BYOC Chorus/Vibrato- TC SCF- Korg DT 10 Pedal Tuner
  • From: Detroit
  • Registered: 2006-06-02
  • Posts: 5,807

Re: Little Trouble with my rivera fandango

I tried out for a band once in some warehouse with my Rivera, and was getting weird radio frequencies or something. Once I left, I couldn't duplicate it. Was the weirdest thing.

- Nic from Detroit... posting on JB's Forum since 6-2-2006
Ask me about my handwound Great Lakes Guitar Pickups
Since 2010, Bonamassa fans have taken advantage of my JB friend discount = my cost + shipping. cool
  • Registered: 2007-09-30
  • Posts: 556

Re: Little Trouble with my rivera fandango

I usually find that happens when there is a ground issue.  If you isolate your amp from other ground sources (computers, tv's, radios on the same circuit) it should stop.

  • Registered: 2007-09-30
  • Posts: 556

Re: Little Trouble with my rivera fandango

PS - Almost forgot.  I've cut down on all noise from now using an isolated power conditioner.  I never get any electrical noise or frequencies w/ all of the mentioned stuff plugged into the same circuit.

  • SgtB
  • Platinum
  • Offline
  • Registered: 2009-03-08
  • Posts: 309

Re: Little Trouble with my rivera fandango

Make sure you have a good ground. Tubes going bad is often a huge cause of noise.
If your cable is shielded at one end make sure that side goes into the amp and not the guitar. It will reverse the effect and act as an antenna.

Make sure your guitar is shielded well too.

Gibson Collectors Choice #6
Joe Bonamassa Custom Shop Goldtop Unaged 1st run
Alvarez Acoustic '95
Gibson Skylark GA5-T '65, Marshall JTM45 Reissue, Fender Princton Reverb '72, Modded Bugera V5, Fender Bandmaster '68, Marshall Silver Jubilee 2558