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RE: delta 100 hum

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In Reply to: RE: delta 100 hum posted by PaulMC on June 19, 2010 at 06:29:43

sorry i didn't explain better. i bought the second amp because the original one had the hum. the hum only occurs when both input channels have an rca connector plugged in. the older post that i copied described the same problem. my question was/is does anyone know the fix. i sent it to a shop in the new orleans area but no luck.

Follow Ups:

RE: delta 100 hum - PaulMC 07:58:16 06/21/10 (4)
Did you try my suggestion? Take a single RCA cable and connect the two inputs together and see if it hums. Let me know what you find.
- RE: delta 100 hum - tdbr8de 15:45:51 06/22/10 (3)
  sorry for the delay. i had to assemble things.
  
  the amp still has the hum/buzz with inputs linked together. i had a shop in the new orleans area inspect the amp and they eliminated some of the buzz/hum but not all of it. (it was more pronounced in one channel)
  
  i suspect power supply caps. this looks like the earliest model delta 100. i know there are at least three design changes. all three have different placement of the caps and rectifiers with the oldest being closest to the circuit boards. i guess i have to call cullen...
  - RE: delta 100 hum - PaulMC 16:31:36 06/22/10 (2)
    Why don't you have the caps replaced?
    - RE: delta 100 hum - tdbr8de 16:47:32 06/22/10 (1)
      i'll probably have that done but i'm getting to the point of diminishing returns.
      
      this version of the amp is the one with four 6800uf 63vdc caps per channel soldered directly to the circuit board. replacement may drive the price of the amp above the threshold however what is it worth as is?
      
      thank you very much for your time and advice. it means a lot when someone with your credentials takes the time to help with questions.
      
      tim
      - RE: delta 100 hum - PaulMC 05:12:58 06/23/10 (0)
        
        In Reply to: RE: delta 100 hum posted by tdbr8de on June 22, 2010 at 16:47:32
        
        Thanks. I just like to make sure all of our products continue to bring enjoyment to people for many, many years. Let us know if we can help.

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