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How do I test my amp's loop?

Discussion in 'Amps [BG]' started by LongHairFreak, Feb 27, 2014.


  1. LongHairFreak

    LongHairFreak Supporting The Gold

    Aug 7, 2006
    Twin Cities - MN
    Hey TB

    My amp's from '71/'72 and I've no way to get skematics, so I've no idea if it's fx loop is series or parallel. Is there an easy way for me to figure this out w/o taking it to my tech?

    Thanks
     
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  3. LongHairFreak

    LongHairFreak Supporting The Gold

    Aug 7, 2006
    Twin Cities - MN
  4. Jazz Ad

    Jazz Ad Mi la ré sol Gold Supporting Member

    Plug something into the fx loop out. If you hear no sound, it's serial.
     
  5. LongHairFreak

    LongHairFreak Supporting The Gold

    Aug 7, 2006
    Twin Cities - MN
    Hmm. So,series cuts off the signal to get in line and parallel walks along side and I'd still have sound, right? Cool! Thanks.
     
  6. You mean FX in, that's usually a switching jack; most FX out are not switching so they can be used as an additional preamp out.

    The preamp schematic is here by the way:

    http://westlabs.com/PreampSchem.HTML

    It's series.
     
  7. LongHairFreak

    LongHairFreak Supporting The Gold

    Aug 7, 2006
    Twin Cities - MN
    HA! Yes, Google is great. I just feel ...'needy'? if I state the following every time I post something.
    I am blind, so I miss a lot on web searches and obviously I wouldn't be able to read a skematic if I did find it.


    Thanks very much for obtaining that information for me.
     
  8. BassmanPaul

    BassmanPaul Gold Supporting Member

    Aug 25, 2007
    Toronto Ontario Canada
    It would be nice if only we could look at a pre-amp schematic that wasn't identical to a Fender!
     
  9. LongHairFreak

    LongHairFreak Supporting The Gold

    Aug 7, 2006
    Twin Cities - MN
    So is this West a Fender knock-off of sorts? I thought it was West's answer to Ampeg.
     



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