Attenuator doesn't attenuate. Not enough impedence?

CigarBoxAudio · 29th July 2009, 02:51 PM

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?

Thanks.

pacificblue · 29th July 2009, 04:29 PM

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.

tinitus · 29th July 2009, 08:08 PM

Last time someone presented a similar problem it was wired wrong

AndrewT · 29th July 2009, 11:49 PM

you may have it wired as a variable resistor rather than a volume control (attenuator).

Wavebourn · 29th July 2009, 11:58 PM

Center tap shunts input. 2 wires need to be resoldered.

29th July 2009, 02:51 PM	#1
CigarBoxAudio diyAudio Member Join Date: Jul 2009	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? Thanks.

29th July 2009, 04:29 PM	#2
pacificblue diyAudio Member Join Date: May 2008	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)

29th July 2009, 11:58 PM	#5
Wavebourn diyAudio Member Join Date: Sep 2006 Location: Pleasant Hill, CA	Center tap shunts input. 2 wires need to be resoldered. __________________ If I disappear suddenly, that means I finally created a time machine and pushed wrong button that brought me to Stalin's Russia. In any experiment any result is the result. Even if it is negative.

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29th July 2009, 08:08 PM	#3
tinitus diyAudio Moderator Join Date: Nov 2005	Last time someone presented a similar problem it was wired wrong

29th July 2009, 11:49 PM	#4
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	you may have it wired as a variable resistor rather than a volume control (attenuator).

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