Help for novice - faulty amp

Hodgie · 9th January 2011, 09:14 AM

Hi all,
I am a novice in terms of most things audio, but have been lucky enough to acquire some vintage components over the last few years.
One is a Phodis CE-6000 amp, which I believe to be a relatively short run Japanese item - more readily found in the southern hemisphere, especially Australia and New Zealand....(I'm starting to sound like David Attenborough!!)
The problem I have is with distortion / crackling at low volumes as I turn the volume knob.
Once I get past a certain point in volume (quite loud), the crackling disappears and the sound is beautifully clear in both channels.
The problem is most noticeable in one channel, but does affect both channels.

I have checked all the obvious things like loose wires etc, and cleaned the RCA jacks etc, but this is the limit of my DIY skills at the moment.

I understand that this may be difficult to answer for such a relatively unknown amp, but I suspect (hoping!!) that it may be a generic issue rather than one specific to this brand/model amp.

BTW - any one with knowledge of Phodis? Not much out there in the ether, so any clues would be good.

Cheers,
Hodgie

Bone · 9th January 2011, 09:29 AM

Sounds like the volume pot is worn. You can try squirting switch cleaner in it but the noise will come back again after a while. Best to change it for a new one.

Tony

Hodgie · 9th January 2011, 10:47 AM

Thanks for such a quick response Tony.

As a rank amateur, one other question - what would a "volume pot" look like?

Is this a diode/resistor/capacitor or other such electrical component that I'm trying to identify, or something elese entirely?

Apologies, but I really am new to this stuff.

Cheers,
Hodgie

jaycee · 9th January 2011, 12:42 PM

It's the control itself - pot is short for "potentiometer". It'll have 6 terminals which means it's really 2 potentiometers in one (one for each channel).

Hodgie · 25th January 2011, 06:53 AM

Hi all,
sorry for the delay, but just wanted to update on the successful cleaning of the pots with switch cleaner - easiest 'repair' I have ever done!
Many thanks for the advice.
Hodgie

9th January 2011, 09:14 AM	#1
Hodgie diyAudio Member Join Date: Jan 2011 Location: Sydney, Australia	Help for novice - faulty amp Hi all, I am a novice in terms of most things audio, but have been lucky enough to acquire some vintage components over the last few years. One is a Phodis CE-6000 amp, which I believe to be a relatively short run Japanese item - more readily found in the southern hemisphere, especially Australia and New Zealand....(I'm starting to sound like David Attenborough!!) The problem I have is with distortion / crackling at low volumes as I turn the volume knob. Once I get past a certain point in volume (quite loud), the crackling disappears and the sound is beautifully clear in both channels. The problem is most noticeable in one channel, but does affect both channels. I have checked all the obvious things like loose wires etc, and cleaned the RCA jacks etc, but this is the limit of my DIY skills at the moment. I understand that this may be difficult to answer for such a relatively unknown amp, but I suspect (hoping!!) that it may be a generic issue rather than one specific to this brand/model amp. BTW - any one with knowledge of Phodis? Not much out there in the ether, so any clues would be good. Cheers, Hodgie

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9th January 2011, 09:29 AM	#2
Bone diyAudio Member Join Date: Jun 2004 Location: Dorset, UK	Sounds like the volume pot is worn. You can try squirting switch cleaner in it but the noise will come back again after a while. Best to change it for a new one. Tony

9th January 2011, 10:47 AM	#3
Hodgie diyAudio Member Join Date: Jan 2011 Location: Sydney, Australia	Thanks for such a quick response Tony. As a rank amateur, one other question - what would a "volume pot" look like? Is this a diode/resistor/capacitor or other such electrical component that I'm trying to identify, or something elese entirely? Apologies, but I really am new to this stuff. Cheers, Hodgie

9th January 2011, 12:42 PM	#4
jaycee diyAudio Member Join Date: Apr 2004 Location: Norwich, UK	It's the control itself - pot is short for "potentiometer". It'll have 6 terminals which means it's really 2 potentiometers in one (one for each channel).

25th January 2011, 06:53 AM	#5
Hodgie diyAudio Member Join Date: Jan 2011 Location: Sydney, Australia	Hi all, sorry for the delay, but just wanted to update on the successful cleaning of the pots with switch cleaner - easiest 'repair' I have ever done! Many thanks for the advice. Hodgie

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