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See_Mos · 3rd Mar 2019, 4:24 pm

Nothing much to worry about on this set. It does not have a capacitor across the mains and the output valve grid capacitor does not cause a problem even if it is a little leaky.

The only ones that may cause a problem are the HT electrolytics C24 and C25.

The resistance of the main transformer is about 19 ohms but that only gives an indication of how good it may be.

Others might suggest having a filament light bulb of 100 watts in the mains lead to limit the current but I personally would connect a meter across chassis and C25 and power it up while watching V4 to see if it is stressed. If C24 / C25 or the mains transformer start fizzing then switch off quick

Oh, and don't change anything unless the component has been proved to be at fault

3rd Mar 2019, 4:24 pm	#71
See_Mos Hexode Join Date: Nov 2003 Location: Ossett, West Yorkshire, UK. Posts: 483	Re: PYE 15A volume Nothing much to worry about on this set. It does not have a capacitor across the mains and the output valve grid capacitor does not cause a problem even if it is a little leaky. The only ones that may cause a problem are the HT electrolytics C24 and C25. The resistance of the main transformer is about 19 ohms but that only gives an indication of how good it may be. Others might suggest having a filament light bulb of 100 watts in the mains lead to limit the current but I personally would connect a meter across chassis and C25 and power it up while watching V4 to see if it is stressed. If C24 / C25 or the mains transformer start fizzing then switch off quick Oh, and don't change anything unless the component has been proved to be at fault Last edited by See_Mos; 3rd Mar 2019 at 4:30 pm.