UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

TonyDuell · 13th Aug 2017, 5:54 pm

Yes, I noticed the tapered end on the switch slider.

Today I took the amplifier chassis apart again, dismantled all the pots and cleaned them Then took all the switch sliders out (one at time!), including the ones on the equalisation PCB (the speed control switch) and cleaned those. Put it all back together, and...

.. The amplifier now seems to work properly on both channels. So it was just bad contacts somewhere. I suspect I can't get much more done on this machine until I get a belt kit (they are available on Ebay).

13th Aug 2017, 5:54 pm	#47
TonyDuell Dekatron Join Date: Jun 2015 Location: Biggin Hill, London, UK. Posts: 5,208	Re: Philips N4450 Yes, I noticed the tapered end on the switch slider. Today I took the amplifier chassis apart again, dismantled all the pots and cleaned them Then took all the switch sliders out (one at time!), including the ones on the equalisation PCB (the speed control switch) and cleaned those. Put it all back together, and... .. The amplifier now seems to work properly on both channels. So it was just bad contacts somewhere. I suspect I can't get much more done on this machine until I get a belt kit (they are available on Ebay).