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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: Allied 333 tube receiver - volume doesn't go all the way down. posted by Clmrt on August 25, 2005 at 19:39:41:
And of the volume that remains when the control is all the way down to zero, all you hear is higher frequency information? As Soundbug already said, you have a dirty pot. The dust and grit and goo has accumulated down at the bottom of the travel of the wiper of the pot. Just operating the pot rakes it all there. And there is so much of it that it has, literally , lifted the metal wiper off the carbon track. So now, the metal of the wiper acts as one plate of a capacitor which is capacitively coupled to the signal running on the carbon track. But because the wiper/track is a lousy capacitor, only a couple of picofarads of capacitance, it nevertheless acts as a high pass filter to pass high frequency information and blocking low frequency signal. Try Deoxit R-5 to all the pots and signal switches and rotary switches and things should brighten up.
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Follow Ups
- Re: Allied 333 tube receiver - volume doesn't go all the way down. - corerosin 23:27:09 08/25/05 (0)
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