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Mesa boogie heartbreaker No reverb

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  • Mesa boogie heartbreaker No reverb

    So this amp came in with no reverb. I check the tank and find one of the small wires broken off at the jack. Soldered it back in place but no reverb. I check the transducers and find one open. Change tank with a similar one, an ‘AB’ type. Still nothing. Changed the RCA cable, and again no verb. Now I start changing tubes and cleaning sockets and re-tensioning the sockets. No luck. Even though the transformer measures Out fine with the ohm meter I swap in a new one and still nothing. Oh forgot to mention the voltages are looking good. Got high voltage on pins 1 and 6. Got low voltage on pin 3 and 8.
    When banging on the tank there’s the usual crash but not that loud.
    The end of the input wire to tank there’s a hum when touched.
    Tried hooking up a speaker to the input RCA cable, no sound.
    I’m running out of things to check.
    Can someone shed some light on this problem?
    Attached Files
    Last edited by pontiacpete; 12-23-2019, 03:52 PM.

  • #2
    You could have some problem with the grounding scheme of the tank (fifth digit of the code). Many times, in Roadster, Road king and others, using Fender type tanks I have been forced to connect the grounds of RCA plugs to each other internally.
    Without that connection these tanks (4AB2C1B, for example) don't work in them.

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    • #3
      Thanks Pedro that did it!!

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