Rogers A100 volume control issues

[rdpx]

Hi -

I was round at a friend's house today and he was playing me some music through his old ROGERS A100 amplifier that sounded pretty good, apart from whenever you moved the volume control there was a bad interference/hissing kind of noise. This settles when the volume is left alone and the amp plays fine.

He was worrying that he needed to get a new amp or that getting it fixed was going to const him an arm and a leg, and I said I would ask the wisdom of the forum what it thought. I am guessing this is a fairly simple/cheap issue that could maybe even be very quickly DIYed? Also maybe the thing just plain needs a service after 30+ years? I thought I should ask on here before taking his amp apart and accidentally rendering it totally broken.

Thanks in advance for any help.

Robert

Please excuse the nasty photo

[mik_rik]

A quick squirt of Servisol switch cleaner/ lubricant onto the control [ may be lucky and can take the
knob off and squirt the base of the shaft without taking the lid off]This will hopefully cure it ,but if it comes back then a new vol pot is needed.WD40 will also work but is not strictly ideal. Mick

[zanash]

its dirt or corrosion on the tracks ....should be easy to sort as previous post states if not its prob only a few pounds for a drop in replacement or tens of pounds for a better one

[rdpx]

its dirt or corrosion on the tracks ....should be easy to sort as previous post states if not its prob only a few pounds for a drop in replacement or tens of pounds for a better one

Thanks guys I'll give it a shot with some servisol/wd40 next time I see him, and if that doesn't work I'll come back and ask where I can get him a new volume pot.

R

[rdpx]

A tiny squirt of WD-40 and some frantic twiddling with the machine pointing up in the air and the volume is now back to being smooth as silk, and my friend thinks I am a hi-fi geniousse!

Thanks both.

Good job though as it looks like a real PITA to open up.



There is a very low frequency humming now when vol turned up high on the TT channel - I am guessing this is something to do with mains cables? He is running an entry level Pro-ject and I am pretty sure that it isn't a grounding type crackle. I have told him to experiment with moving his TT cables away from other ones sprouting behind the back of his system.

R