Volume pot for Musical Fidelity F22 pre amp.

henkel · 29th May 2006, 03:13 AM

Hi! guys,

I hope you can help a newbie with a problem. I noticed the volume pot in my pre-amp buzzing(right chanel only) every time I turn the volume up or down, I've tried cleaning it with CRC contact cleaner but the buzzing came back after a few weeks.

Perhaps, I thought it's time to replace the volume pot?

I opened up the casing and the remote volume pot has and motor placed behind it. both the motor and pot are PCB mounted which is connected to main PCB board via ribbon connectors.

The volume pot looks like Alps blue velvet, but I can't tell which ohm value it's using, and I am hoping that some one here can help?

Thanks for looking.

henkel · 30th May 2006, 07:22 AM

Anyway, last night with some help of an experience friend, manage to find out. It's a 50K ohm Alps Blue Velvet pot.

Thanks for looking.

Geek · 30th May 2006, 11:54 AM

If it's hum or buzz and not a *kshhhhhcracklekshhhh*, I'd say a power or decoupling cap.... maybe even a tube (h-k leakage) rather than the control.

henkel · 30th May 2006, 04:14 PM

Hi!,

It's definitely, the *kshhhhcrakleshhhh* one. And it only happens when I turn the volume up or down.

Geek · 30th May 2006, 10:07 PM

Try a little bit of WD-40 in the control and work it for 20 seconds. Might be a cure

henkel · 31st May 2006, 04:28 AM

Thanks,

Will try WD 40 instead.

29th May 2006, 03:13 AM	#1
henkel diyAudio Member Join Date: Aug 2005	Volume pot for Musical Fidelity F22 pre amp. Hi! guys, I hope you can help a newbie with a problem. I noticed the volume pot in my pre-amp buzzing(right chanel only) every time I turn the volume up or down, I've tried cleaning it with CRC contact cleaner but the buzzing came back after a few weeks. Perhaps, I thought it's time to replace the volume pot? I opened up the casing and the remote volume pot has and motor placed behind it. both the motor and pot are PCB mounted which is connected to main PCB board via ribbon connectors. The volume pot looks like Alps blue velvet, but I can't tell which ohm value it's using, and I am hoping that some one here can help? Thanks for looking.

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30th May 2006, 07:22 AM	#2
henkel diyAudio Member Join Date: Aug 2005	Anyway, last night with some help of an experience friend, manage to find out. It's a 50K ohm Alps Blue Velvet pot. Thanks for looking.

30th May 2006, 11:54 AM	#3
Geek diyAudio Member Join Date: Sep 2004	If it's hum or buzz and not a *kshhhhhcracklekshhhh*, I'd say a power or decoupling cap.... maybe even a tube (h-k leakage) rather than the control.

30th May 2006, 04:14 PM	#4
henkel diyAudio Member Join Date: Aug 2005	Hi!, It's definitely, the kshhhhcrakleshhhh one. And it only happens when I turn the volume up or down.

30th May 2006, 10:07 PM	#5
Geek diyAudio Member Join Date: Sep 2004	Try a little bit of WD-40 in the control and work it for 20 seconds. Might be a cure

31st May 2006, 04:28 AM	#6
henkel diyAudio Member Join Date: Aug 2005	Thanks, Will try WD 40 instead.

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