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  • Brand New Here

    Hello, looking to learn a lot and contribute when I can help. Ive done probably 30 hours of personal study on amps. I've got experience in guitar wiring. BIG point!---> I'm looking forward to getting hands on in my amp. I want to do it safely above all else! Perhaps someone can point me to a great online read of the various risks.

    I've got a 68 Pro Reverb with AA165 schematic, supposedly. I've had it for 10 years. Great late amp maker in town revived it, so I believed it's been 'blackfaced'. So far I've pulled V1 and disconnected 1 of the 2x12 speakers. (Stock config. Sounded great, volume lv10 was best but insane volumes. With the newer config. Great tone at 5-6, but past 7 the amp gets unwanted fizz breaking through. Anyways, I want to start jumping in the amp, I figured a start would be- change filter caps(stock spec/or more tweedish), check bias. I am of the assumption that both of these repairs are very dangerous. I've seen all the steps, but still this is all theoritical at this point.

    Thanks for listening and any advise,
    Dalton

  • #2
    You might see what this has.
    DIY: Amp Safety 101 | Premier Guitar
    GL,
    T
    "If Hitler invaded Hell, I would make at least a favourable reference of the Devil in the House of Commons." Winston Churchill
    Terry

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    • #3
      Another good place is the tube amp faq at geofex.com, which covers some safety aspects, then the tube amp debug page at same site.
      Originally posted by Enzo
      I have a sign in my shop that says, "Never think up reasons not to check something."


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      • #4
        A lot of the amp kits have good fire up instructions.
        Heres a manual for a Tube Depot JTM45+.
        Page 34 has some good test info.
        https://d1sjrnpi226dnf.cloudfront.ne...pdf?1391458294
        When I built my scratch builds, I read every manual I could find.
        GL,
        T
        Also in case you have a fuse blowing condition, a Variac or a simple dim bulb tester can make life easier, and save some expensive fuses.
        https://www.google.com/search?q=dim+...w=1366&bih=600
        I have a dim bulb tester and wouldn't fire up an unknown amp without it.
        "If Hitler invaded Hell, I would make at least a favourable reference of the Devil in the House of Commons." Winston Churchill
        Terry

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