1. briangibson

    briangibson Member

    Messages:
    44
    Joined:
    Jan 19, 2006
    So I just wired up this Gemini VI with a 3 prong cord and didnt blow myself up. Oh god, it sounds great, even better than my GV-22 somehow. (Some minor motorboating at max levels but I'm gonna replace a couple more caps/resistors and see if it goes away) So far I've replaced the 20/20 multisection cap with a 33/33 multi, the 100uf bias cap, and a couple resistors. I'm trying to wire up a replacement LED lamp because the original was lost years ago. When I put it in the circuit I get additional hum- is there a good place to put it in the schem?

    [​IMG]
     
  2. VacuumVoodoo

    VacuumVoodoo Member

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    Jan 9, 2005
    Location:
    Gothenburg, Sweden
    Heater winding is a good place. LED with 180 to 270 ohm resistor in series and 1N4001 diode in reverse parallell with the LED.
     
  3. briangibson

    briangibson Member

    Messages:
    44
    Joined:
    Jan 19, 2006
    that would explain a lot of my headaches. thanks OTM. that 270k resistor on the schem needs to be replaced, too- i just measured it and it's reading way way below its rating. I'll give it a shot where it's supposed to be on the schematic and post again if i have another issue.

    Brian
     
  4. TheAmpNerd

    TheAmpNerd Member

    Messages:
    1,062
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    Sep 23, 2004
    Location:
    Tejas
    Don't feel stupid.
    It is part of the learning process.
    No one knows everything.

    There are some very bright and experienced folks here.

    It is great that they share their knowledge,
    tricks of the trade, know what works,
    know some work arounds to common
    problems, etc.

    Everyone benefifts too.
    And we get to keep these wonderful
    old tube amps working for generations to come.

    At what other point in history could man,
    from his home, ask a technical question
    and within hours get a host of solutions.

    Back in the day, it took months if ever.
    You'd have to write to the publication.
    Then the editorial staff would sort through it.
    They'd have a pow wow of the best stuff.
    Vote on what to include in the next publication
    (probably a couple of months off) Research the
    answer with their SME (subject Matter Experts)
    Edit it all down (and hope they got it right).
    Then vote again and submit for review,
    approval, and layout, printing etc.
    If they missed the submission deadline,
    it might go into the next monthly, quarterly issue.

    So if you were lucky, you got an answer in a
    couple of months. If not, you had to keep blowing
    things up until you figured it out or died trying. : )




     
  5. TheAmpNerd

    TheAmpNerd Member

    Messages:
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    Sep 23, 2004
    Location:
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    It's ok OTM,

    You just pic that tele of yourn
    on that rockin' chair on the
    front poach.

    Feel free to
    crack that thar
    volumen knob on
    that JBL loaded Super.
     
  6. donnyjaguar

    donnyjaguar Member

    Messages:
    4,243
    Joined:
    Nov 4, 2005
    Location:
    Canada
    Here's a silly question. Why does that amplifier have four inputs? Is that so you and three friends can play guitar together? :) Come to think of it, why do some guitar amplifriers still have more than one input? I dunno 'bout you, but its sure easier to flick a switch to change input settings than pulling out a plug and re-inserting. Kinda precludes one from foot-pedal switching too.
     
  7. VacuumVoodoo

    VacuumVoodoo Member

    Messages:
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    This is to let you have 4 guitars plugged in at once on stage. Change guitars without unplugging. Six guitars anyone?
     
  8. brad347

    brad347 Member

    Messages:
    4,817
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    Feb 8, 2006
    Location:
    Brooklyn, NY
    i think multi-input amps were more common back in the day.

    I know in my high school jazz band days playing through a silverface "bassman ten" we had two guitars and a bass all plugged into it for purposes of rehearsal. It never blinked :)
     
  9. TheAmpNerd

    TheAmpNerd Member

    Messages:
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    Sep 23, 2004
    Location:
    Tejas
    If you want Six guitars to be plugged in at once,
    then you'll need the six input Vox AC30.
     
  10. VacuumVoodoo

    VacuumVoodoo Member

    Messages:
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    Jan 9, 2005
    Location:
    Gothenburg, Sweden
    6 inputs? Oh well....where do I plug in my tambourine?
     

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