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Effects chain volume boost problem Vintage Dyna Comp

Discussion in 'The Stomp Box' started by ReadmyTele, Sep 28, 2011.

  1. ReadmyTele

    ReadmyTele TDPRI Member

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    Belgium
    Hello all!

    Could someone explain to me what is going on?

    Here is the problem :

    I have an original Block logo 80's Dyna comp (no mods), sounds great.
    If i switch it on in front of my truebypass boutique overdrive switched on or off i get a huge volume boost and fizzy noisy sustain even with knobs at 9 oclock on the dyna. No problem if the Dyna is switched off.

    If i place the Dyna after the Overdrive it works normally just like when it is alone in the chain. :confused::confused:
     
  2. 68thinline

    68thinline Tele-Afflicted

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    I think you are over-driving your overdrive. :)
     
  3. ReadmyTele

    ReadmyTele TDPRI Member

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    boosts alone in the chain now

    Ok now my old dyna had the same problem again but with just a guitar-comp-amp setup.

    So it looks like my pedal has a random bug that makes it twice as gainy than normal, it hums loud and has fizz and noise in the sustain... I opened it and all looks ok, so i tried it again and it was normal again. I'm sure next time it will do the same joke.

    I use a 1966 vibro champ and a highway 1 tele.

    If any body can tel me what specific parts could cause this gain problem would be very nice ;)
     
  4. ReadmyTele

    ReadmyTele TDPRI Member

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    cold solder

    So it may be a cold or dry solder, i resoldered the bottom right component of the circuit and for now it seems to be ok!

    How can i delete this thread?
     
  5. vjf1968

    vjf1968 Poster Extraordinaire

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    You can't. It's here till the end of time.
     
  6. ReadmyTele

    ReadmyTele TDPRI Member

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    Belgium
    problem was the volume pot

    Ok so in the end it seems like i had just a dirty volume pot causing the random volume boost and fizzy windy sound on the sustain...

    So after spraying contact cleaner and turning the pots everything is ok.

    Only problem is that i find the pedal brighter and clearer than it use to be with the dirty pot. It has no more mojo. Weird.

    Glad the problem is fixed so i can sell it as a fully functional pedal.
     
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