Quick Q for those who have used one of these before (as i have previously mentioned here am a bit of a newbie)...and is probably most of you!
So able to happily set it all up, and have taken as a bit of a test a Mullard EF91 New from the box (still sealed with the Wrapping around it). Settings according to the book are...
6.3v heater, 250v Screen, 250v Anode, 2v Grid. selectors set to 412 361 500 000. It shows the Ia as 10mA and the Mutual Conductance as 7.6.
So - Valve in, Here's the question. The test selector has multiple different settings...
Rect 1
Rect 2
Diodes
Fil cont
Cath leak
gm 3 a/v
gm 15 a/v
From what i can tell looking at some online videos for the 45C, this would be set to gm 3 a/v, you then fire it up and leave the valve to warm up... (20-30 secs). needle starts to move up... and stops. (see attached)
ok. so what have i missed...
Please excuse the newbie... any pointers gratefully welcomed at this stage!