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

Pete_kaye · 13th Sep 2017, 2:05 pm

I have measured voltages at the volume control which has been replaced at some time. It is nominally 470K but mine measures 400K cold. I gave it some Servisol.
When working well , the voltage on the top of the volume control is -2.1v but then drops to -.8v. The same thing happens at the wiper (-.100 to -.050). Switched off , the pot measures 400k again after several seconds as it rises on the DMM. I presume this is due to caps discharging ??
I am looking out for another 6EB6/EK90.
McMurdo did you try to repair the volume control or just replace it?

13th Sep 2017, 2:05 pm	#13
Pete_kaye Octode Join Date: Jun 2005 Location: Sheffield, South Yorkshire, UK. Posts: 1,227	Re: Toaster FB10 elusive fault I have measured voltages at the volume control which has been replaced at some time. It is nominally 470K but mine measures 400K cold. I gave it some Servisol. When working well , the voltage on the top of the volume control is -2.1v but then drops to -.8v. The same thing happens at the wiper (-.100 to -.050). Switched off , the pot measures 400k again after several seconds as it rises on the DMM. I presume this is due to caps discharging ?? I am looking out for another 6EB6/EK90. McMurdo did you try to repair the volume control or just replace it?