View Single Post
Old 5th Feb 2019, 8:36 pm   #18
buggies
Heptode
 
buggies's Avatar
 
Join Date: Jan 2009
Location: West Lothian, UK.
Posts: 760
Default Re: Marconi Valve Voltmeter TF1041C - repair thread

The circuit portion you have shown looks like part of page 2 of the pdf that wme-bill provided. His circuit had the ac voltage on the transformer secondary and the total dc on the diodes and caps. I could not quite make out the values but think the dc is 300V - so your 276V is a bit low to start with.
Other than that - and just of interest - what is the variation on the anode-grid junction as you change the preset end to end?
__________________
George
buggies is offline