Amp/Preamp Asylum

Less "noisy" ? (nt

143.109.148.201

peppy m.

In Reply to: RE: Think about the power supplies posted by niws on November 25, 2024 at 19:51:39

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Follow Ups:

RE: Less "noisy" ? (nt - farfetched 06:41:03 11/26/24 (4)
I hear yeah.

I turn my preamp to 75% and I cannot hear a thing at the speakers.

I put my ear against the amps, I can't hear anything.

I put my ear against the power supplies, no noise.

So am assuming this noise is non-audible noise, which I guess I would say, then show me a measurement. Right?

When I use my toroid-powered amps, I can hear them slightly humming if I put my ear against the chassis. That's noise.
/ optimally proportioned triangles are our friends
- Do you have a phono section or AM radio? - Ralph 08:05:32 11/26/24 (3)
  If so crank up the volume on the phono section and see if you can hear it. Put the power supply (which is on a cable so easy to move) near the phono section. If you hear anything from it or there is a change when the power supply is unplugged from the wall, its a problem.
  
  If you have an AM radio put the power supply near that and tune across the dial. You're looking for noise that appears in certain places on the dial that isn't a radio station. Unplug the power supply- does it go away?
  - phono at 75 - nothing still - farfetched 08:03:52 11/27/24 (2)
    I did the phono section test. I play record around ~25 on the volume and I turned that, too, up to 75. (no record playing of course)
    It might just be an old audiophiles tale, that such noise matters are intractable and/or inherent.
    These amps themselves are an affront to convention.
    
    / optimally proportioned triangles are our friends
    
    Edits: 11/27/24
    - You can't be playing a record when you have the volume up - Ralph 08:05:54 11/27/24 (1)
      And the power supply should be close to the phono section.
      
      I get a distinct tone out of it.
      - So it is audible? - farfetched 07:25:39 11/29/24 (0)
        
        In Reply to: RE: You can't be playing a record when you have the volume up posted by Ralph on November 27, 2024 at 08:05:54
        
        In which case I'm not getting it.
        
        My tt isn't in my listening room. Run wires through wall, turntable room doesn't share the same foundation, it's just an addition.
        
        More people should put their turntables in a diff room. Not hard to set the cue to be very slow. I can dance while playing an LP.
        
        Amount spent on isolation: zero
        
        / optimally proportioned triangles are our friends

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