16-01-2019, 01:17 PM
(This post was last modified: 16-01-2019, 01:22 PM by ppppenguin.)
The Trader index says sheet 858 for the Pye 47X but the sheet itself says Invicta 200. Could you please clairify? Is there another sheet that's specifically for the Pye?
That dropper has a lot of dropping to do. There's only 94V on the heater chain so for 230V mains in a 150mA chain that's over 20 watts. A capacitor dropper would work out at around 2.2uF. Perhaps a smidge higher because you've got a 50L6GT in there but it's not going to be that critical.
As devout coward, and mainly playing with TVs rather than radios, I believe in getting the heater chain working first, before gently applying HT. Perhaps not so vital for a radio.
PS: I hope that the charity shop was selling the set for display only with the mains lead cut off. It wouldn't be legal to do otherwise unless it's properly safety tested which would mean signifcant resotoration too.
That dropper has a lot of dropping to do. There's only 94V on the heater chain so for 230V mains in a 150mA chain that's over 20 watts. A capacitor dropper would work out at around 2.2uF. Perhaps a smidge higher because you've got a 50L6GT in there but it's not going to be that critical.
As devout coward, and mainly playing with TVs rather than radios, I believe in getting the heater chain working first, before gently applying HT. Perhaps not so vital for a radio.
PS: I hope that the charity shop was selling the set for display only with the mains lead cut off. It wouldn't be legal to do otherwise unless it's properly safety tested which would mean signifcant resotoration too.
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv
