Combined Volume tone off/on - UK Vintage Radio Repair and Restoration Discussion Forum

BigClick · 28th Jan 2016, 4:43 pm

Hi folks,

I was listening to the football on my restoration project (Regentone A.155) and I noticed sharp changes in volume especialy when putting any pressure on the volume control.

Its a combined knob (vol, tone, and on/off). I have read here that they can be taken apart to repair the internal gubbins so I set about de-soldering the resistors, capacitors and hook-up wire.

Thing is, as I was removing the last few connections I noticed a resistor that was straddling the pot and a tag board was loose on the tag board end, so now I think this was probably what was doing the jumps in volume. I carried on anyway and removed the control.

It is behaving impeccably with a DMM attached to volume and tone with no sudden changes in resistance if I tap the controller or press on the spindle.

My question is should I still dismantle it for the sake of preventative maintenance or leave well alone?

Kind regards

Goldie99 · 28th Jan 2016, 4:50 pm

Considering the pot may well be 'unobtainium' now, and that the loose resistor is a likely candidate for the source of the original problem, I'd adopt the 'if it ain't broke, don't fix it' philosophy, and just give it a gentle clean & lube, reassemble, and see how it goes.

Alan

BigClick · 28th Jan 2016, 7:34 pm

Thanks Alan, I think that is a wise move on reflection

28th Jan 2016, 4:43 pm	#1
BigClick Hexode Join Date: Dec 2015 Location: Walsall, West Midlands, UK. Posts: 327	Combined Volume tone off/on Hi folks, I was listening to the football on my restoration project (Regentone A.155) and I noticed sharp changes in volume especialy when putting any pressure on the volume control. Its a combined knob (vol, tone, and on/off). I have read here that they can be taken apart to repair the internal gubbins so I set about de-soldering the resistors, capacitors and hook-up wire. Thing is, as I was removing the last few connections I noticed a resistor that was straddling the pot and a tag board was loose on the tag board end, so now I think this was probably what was doing the jumps in volume. I carried on anyway and removed the control. It is behaving impeccably with a DMM attached to volume and tone with no sudden changes in resistance if I tap the controller or press on the spindle. My question is should I still dismantle it for the sake of preventative maintenance or leave well alone? Kind regards

28th Jan 2016, 4:50 pm	#2
Goldie99 Heptode Join Date: Jul 2014 Location: Boston, Lincolnshire, UK. Posts: 995	Re: Combined Volume tone off/on Considering the pot may well be 'unobtainium' now, and that the loose resistor is a likely candidate for the source of the original problem, I'd adopt the 'if it ain't broke, don't fix it' philosophy, and just give it a gentle clean & lube, reassemble, and see how it goes. Alan

28th Jan 2016, 7:34 pm	#3
BigClick Hexode Join Date: Dec 2015 Location: Walsall, West Midlands, UK. Posts: 327	Re: Combined Volume tone off/on Thanks Alan, I think that is a wise move on reflection