(09-11-2012, 05:53 PM)Andrewausfa Wrote: Al,
I've just been looking at the pin connections for the TV4 and EM1 valve and the pin outs per the data on the National Valve museum site differ to what you've offered above which is maybe what's causing confusion. They say;
1. -
2.h
3.h
4.k
5.-
6.g1
7.t
8.a
This ties up with the connections on 'my valve, whatever it may be! I've taken the valve out and there's absolutely no markings on it. I've done a nice close up of the valve base. Which ever valve it is I'm wondering if I could pay my mortgage off with it.
Andrew
Hi Andrew, looking at that picture it looks like an EM1 type connections ie:
Target at ht, pin7.
Anode to ht via a high value resistor (2 or 3 meg), pin 8.
Cathode to deck, pin4.
Grid to grid leak (10 meg) and SW, pin6.
pin 5 n/c, pin 1 n/c (?)
Heaters, pins 2 & 3.
Lawrence.
