Dual CS 505-3. Burning smell and fluctuating speed. - Page 2 - UK Vintage Radio Repair and Restoration Discussion Forum

Michael Maurice · 4th Apr 2021, 11:30 pm

Quote:

Originally Posted by ben

It is too easy to change the obvious thing like an overheating resistor, and neglect a possible underlying cause.

The lubricant going sticky is the cause of the overheating resistor. I've never had to change one and I've serviced loads of them

Electronpusher0 · 5th Apr 2021, 12:40 pm

Likewise, I have refurbished 5 of these decks, changed the capacitors on them all (all Rifa, all blown) but never had to replace a resistor.

Peter

Welsh Anorak · 6th Apr 2021, 3:09 pm

Agreed. The resistor runs fairly cool when it's feeding a nice free motor. A slight smell and you know what to expect.

5th Apr 2021, 12:40 pm	#22
Electronpusher0 Nonode Join Date: Jun 2016 Location: Bognor Regis, West Sussex, UK. Posts: 2,296	Re: Dual CS 505-3. Burning smell and fluctuating speed. Likewise, I have refurbished 5 of these decks, changed the capacitors on them all (all Rifa, all blown) but never had to replace a resistor. Peter

6th Apr 2021, 3:09 pm	#23
Welsh Anorak Dekatron Join Date: Apr 2005 Location: North Wales, UK. Posts: 6,920	Re: Dual CS 505-3. Burning smell and fluctuating speed. Agreed. The resistor runs fairly cool when it's feeding a nice free motor. A slight smell and you know what to expect. __________________ Glyn www.gdelectronics.wales