Spring reverb?

Discussion in 'Amps and Cabs [BG]' started by SurferJoe46, Dec 8, 2014.

  1. Got a really nice working older Peavey amp and the bathtub reverb is dead. It just hums, but dropping the cab doesn't produce the "spring-explosion" sound usually made when I do this to my Fender combo.

    Hopefully I'm asking this in the correct forum subsection, but is this a swap out repair or what?
  2. Bob-I


    Sep 12, 2014
    It may be a reverb driver problem.

    The way the reverb functions is that there is a small power amp that drives the signal into the tank. The tank then delays the signal and sends it into the output section of the amp.

    A simple test of the send section is to disconnect the tank input wire and connect it to a speaker. Turn the reverb up and see if you get some sound from the speaker. You already tested the return section effectively by listening to the sprong.

    If both the driver and return work, it must be the tank. They're cheep and available at tubesandmore.com
  3. Passinwind

    Passinwind I know nothing. Commercial User

    Dec 3, 2003
    Columbia River Gorge, WA.
    Owner/Designer &Toaster Tech Passinwind Electronics
    A broken wire right at the input or output jack on the tank is pretty common, and only a moderately difficult DIY fix. If the break's at the transducer end just replacing the tank is the call unless you're a real masochist. A fried opamp on either the send or receive side is quite possible too; that is a fairly technical repair unless it happens to be socketed. None of these takes all that much bench time for a decent tech. Occasionally the reverb switching circuit is at fault, have to know more details to comment on that possibility though.

    Are you sure you care enough about using the 'verb for a bass application to bother fixing it in the first place?
    Last edited: Dec 8, 2014
  4. Jeff Scott

    Jeff Scott Rickenbacker guru..........

    Apr 11, 2006
    Out there!
    I use my Flint quite a lot with my basses. Of course, it sounds way better than any sprinnnnnnnnnng reverb.
  5. Passinwind

    Passinwind I know nothing. Commercial User

    Dec 3, 2003
    Columbia River Gorge, WA.
    Owner/Designer &Toaster Tech Passinwind Electronics
    I use digital 'verb quite a lot in my own band, but the typical Peavey sproinger in many of their SS amps wouldn't be worth throwing much money at to me for a bass application. I could almost always fix 'em without having to do that though.
  6. I may have been somewhat misunderstood, as the amp is an 800 Series that I don't use for my basses. But I need the reverb as my other possible solution is to only get reverb on one of the twin amps that live in this unit by plugging it into the loop and into one of the two available post pre amp input, #1 & #2.

    That would kill the effect that I need.

    So I'll dive into this with my digital meter and check it out. Hopefully this will be a broken connection or a bad solder joint.

    I've already converted this old amp to the new modular female receptacle so the 120V cable doesn't have to be wound around those lame-o wire holders in the back.
  7. agedhorse

    agedhorse Supporting Member Commercial User

    Feb 12, 2006
    Davis, CA (USA)
    Development Engineer-Mesa Boogie, Development Engineer-Genzler (pedals), Product Support-Genz Benz
    Can't be the reverb driver if there's no return signal. It's probably going to be either the receive transducer, receive wiring, or return amp.
  8. I'll get some info as soon as possible back to everyone.

    Thanks all!