• Re: AN Pre - rentiap 22:40:39 08/20/04 (0)
  In Reply to: AN Pre posted by tgorham3 on June 23, 2004 at 19:45:43:

  Hello;
  I had a poroblem with my M-2 it started humming real bad about a month ago.
  I found that a solder connection had gone bad at both ends of what looks like a thick resistor(I can't tell exectly what this piece is!)If somebody knows please enlighten? that is connected to the ground wire that is at the grounding post at back of case with a wire going to the 6sn7 board.
  I.m not sure what this piece is but the solder joints seem to have shorted (burnt at both ends).
  I cleaned both ends and resoldered it back in place, at the same time I replaced the wire it is connected to with a solid silver 4ns 24awg wire.

  Now the humm is completely gone I have to put my ear within an inch of the speaker drivers to hear any line noise.

  I hope this helps.
  Regards.
  Craig
  
  

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• Re: AN Pre - RGA 13:54:24 06/27/04 (1)
  In Reply to: AN Pre posted by tgorham3 on June 23, 2004 at 19:45:43:

  Another culprit can be television cable. Both my Sugden and Arcam amps hummed very loudly and the problem was that the cable company doid not ground the wire - this caused interference of some kind which made the amp hum. They fixed it and no more hum from the amp!! :-)
  
  

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  • Direct TV - Direct TV 14:31:55 11/29/04 (0)

    Sorry... That message number is not valid.
• AN Pre - markmac 15:10:49 06/25/04 (0)
  In Reply to: AN Pre posted by tgorham3 on June 23, 2004 at 19:45:43:

  Are there any power company transformers close to your new listening location? Wiring in the wall could be an additional culprit. Perhaps you can vary the physical placement of the pre-amp to determine if the character of the hum changes. Are you using tube shields in your pre-amp?
  The chopper sound that you describe seems more like oscillation than hum.
  Good Luck and keep us posted,
  mark
  
  

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• Re: AN Pre - AudioNoteKits 06:11:18 06/25/04 (0)
  In Reply to: AN Pre posted by tgorham3 on June 23, 2004 at 19:45:43:

  TG,
  You may want to look around your room and find out what other electrical devices are in the area , lamps , computers etc... You may want to try turning off all the other devices that are in the room to see if thats the source of the problem. The second thing we could look at is re-orienting the mains transformer - changing its angle for example

  Regards
  Brian Smith
  
  

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