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Hammond M2 HELP!
Old 19th March 2010
  #1
Gear Maniac
 
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Hammond M2 HELP!

motor runs smoothly, amp works (just got it repaired), speaker hums a bit, but no sound from any of the keys...
Old 19th March 2010
  #2
ktf
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What about the preamp?
Old 22nd March 2010
  #3
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wheres the pre-amp? within the amp?
Old 22nd March 2010
  #4
Lives for gear
 

If it's where it is on a B3, located behind the tonewheels. At least the B3/C3 had a separate preamp cabinet with a few tubes in there, and the pedal linkage went to it as well. The preamp is in there, and the vibrato amplifier, and the percussion gate/amp as well. I don't remember the feature set of the M2, but anyways, that's what's in it in a B3, and where it is.

See if you have signal at the output of the mixing transformer. If you have signal there, then the preamp isn't working right. If there isn't then you need to figure out where it's stopping. Do you have good connections through the drawbars? If there are bad connections or opened resistors, you'll can get the 'quiet' preset 000... (silence). Normally if you pull all the bars out at least one should contact even if you do have drawbar problems.
Old 23rd March 2010
  #5
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there are no pre's on a M, and i have it narrowed down to the two tube circuits where the keys go in and come out.
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