Removing tubes?

Discussion in 'Amps/Cabs Tech Corner: Amplifier, Cab & Speakers' started by redmax61, Aug 11, 2006.

  1. redmax61

    redmax61 Member

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    A friend of mine is wanting to use the preamp in Fender Pro Reverb, but he doesn't want the amp to drive any speakers. I recommended the use of something like a Hot Plate to keep a load on the power section. The tech at a local store told him to just pull the power tubes out of it and not even worry about a load.

    This sounds like a crock to me. How safe is this practice?
     
  2. AdmiralB

    AdmiralB Silver Supporting Member

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    Is this a BF/SF Pro, or one of the recent 'Pro-Tube' models? I ask because I wonder how the preamp in a BF/SF is going to be accessed, otherwise, unless it's through the reverb send.

    In any case, pulling the power tubes will do the job.
     
  3. wgs1230

    wgs1230 Fully Intonatable Silver Supporting Member

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    No crock, completely safe. Jerry Garcia ran a preamp-tapped Twin, no power tubes, into a Macintosh 2300 power amp for ~15yrs.

    Take a look:
    http://www.dozin.com/gear/preamp/mod.html
     
  4. Blue Strat

    Blue Strat Member

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    What WGS said, though you may want to monitor the plate voltage on the preamp tubes which will increase without the load from the power tubes.
     
  5. redmax61

    redmax61 Member

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    Let me rephrase the question. The guy knows little or nothing about tube amps. You mentioned monitoring plate voltages on the preamp tubes.

    Can this be done safely by a "tube moron"?
     

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