garnet questions

Discussion in 'Amps/Cabs Tech Corner: Amplifier, Cab & Speakers' started by axolotls, Dec 8, 2005.

  1. axolotls

    axolotls Guest

    i have a garnet pro, and this thing eats tubes. i cant leave it on for much more than a half hour without the entire plate turning red.

    im not real sure what the deal is, i was told that these amps run really hot and there wasnt a whole lot to be done about it.

    i was wondering if there was a good pair of 6ca7's that could stand a higher plate voltages that i should look into putting into this beast.

    also, i was searching stuff on garnets in these forums and i saw a mention of a mod that could be done to make the fuzz useable at lower volumes.

    is there a schematic or a layout or instructions somewhere on this, because, i love the fuzz on this amp, but it just doesnt work until its turned up insanely loud. if you dont get it opened up it just sounds like you have a bunch of screws on your speakers.

    thanks.
     
  2. drbob1

    drbob1 Silver Supporting Member

    Messages:
    21,583
    Joined:
    Aug 9, 2004
    You should be able to bias the tubes to be safe (although I suppose if the plate voltages are just off the scale) but that should be adjustable too by putting a resistor in series? I'm sure there's a solution to this problem, John Phillips probably has it all wired... A couple of things you could try while you're waiting to hear from them:
    1. If you have access to a Weber bias probe check the plate voltage and plate current...
    2. Talk to Lord Valve about which 6L6 type tube'sll hold up the best...
     
  3. axolotls

    axolotls Guest

    ill check the bias this weekend, and it takes el34 type tubes.

    would it be wise to look into kt88's?
     
  4. VintageJon

    VintageJon Member

    Messages:
    155
    Joined:
    Nov 3, 2005
    Location:
    Austin TX
    Just worked a Garnet today- complaint was massive oscillation. Turned out to be lack of decoupling in pre-amp due to original cap-can dried out.

    Noted original Bias-Supply cap also...

    Needs a complete cap job. Garnet amps seem to use a lot of cans so it's gonna be expensive and some difficult than a Fender with axial-lead caps.

    Would bet on Bias-Supply cap...

    -Jon
     
  5. axolotls

    axolotls Guest

    damn that sucks.
     

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