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

Chris55000 · 23rd Feb 2021, 8:40 pm

Hi!

I had a P75 when I was younger, and the correct h.t. rectifier should be an EZ40 if an EL41 output valve is in use as the 60mA maximum current rating of the EZ41 is only just adequate to cover the h.t. current of the set, however, if you reduce the anode current of V4 (EL41) by inserting a 5k6 2W resistor between pin 5 (g2) of V4 and the main h.t. line, this will reduce the total h.t. current to within the EZ41's rated 60mA with a bit to spare!

Chris Williams

23rd Feb 2021, 8:40 pm	#8
Chris55000 Nonode Join Date: Aug 2007 Location: Walsall Wood, Aldridge, Walsall, UK. Posts: 2,874	Re: Pye 75 valve line up Hi! I had a P75 when I was younger, and the correct h.t. rectifier should be an EZ40 if an EL41 output valve is in use as the 60mA maximum current rating of the EZ41 is only just adequate to cover the h.t. current of the set, however, if you reduce the anode current of V4 (EL41) by inserting a 5k6 2W resistor between pin 5 (g2) of V4 and the main h.t. line, this will reduce the total h.t. current to within the EZ41's rated 60mA with a bit to spare! Chris Williams __________________ It's an enigma, that's what it is! This thing's not fixed because it doesn't want to be fixed!