Attenuator doesn't attenuate. Not enough impedence? - diyAudio
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Old 29th July 2009, 03:51 PM   #1
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Default Attenuator doesn't attenuate. Not enough impedence?

I have a 10k ALPS RK097 (the little green one) on my preamp, and It doesn't really do much. It certainly doesn't stop the sound when it's turned all the way down.

Is that because its only 10k? Should I get something like a 50k?

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Old 29th July 2009, 05:29 PM   #2
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Sounds more like a wrong connection. If you look at the potentiometer from the front (knob) the left pin goes to ground, the right to the RCA connector and the center pin to the amplifier's input.

If that does not cure the fault, post a schematic of your amplifier.
If you've always done it like that, then it's probably wrong. (Henry Ford)
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Old 29th July 2009, 09:08 PM   #3
tinitus is offline tinitus  Europe
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Last time someone presented a similar problem it was wired wrong
sometimes we know very little, and sometimes we know too much
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Old 30th July 2009, 12:49 AM   #4
AndrewT is offline AndrewT  Scotland
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you may have it wired as a variable resistor rather than a volume control (attenuator).
regards Andrew T.
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Old 30th July 2009, 12:58 AM   #5
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Center tap shunts input. 2 wires need to be resoldered.
The Devil is not so terrible as his math model is!
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