[Test-Equipment] HP 410C

[bonddaleena at aol.com]

Hi. I have a pretty nice HP 410C. I bought it several years ago, and it 
works ok on DC and Ohms. It did not come with the 11036A AC / HF probe. 
I have since acquired one. Although I 'swear' I have several EA53 tubes 
here (somewhere) I also have several NOS 2-01C tubes, in my hot little 
hands. I was reading the instruction sheet that came with the 2-01C 
tube and they describe 'adjusting R50' (this sheet only talks about the 
410B), for 5.0 Vrms. They DO describe adjusting R50 for 6.3 V when 
using the EA53.
OK, I have a Manual for my 410C, and nowhere do I see how to adjust the 
voltage.
I DO understand that the 410C supplies 6.3 VAC to the probe filaments 
when in modes OTHER than AC. When AC is selected, the filiment voltage 
is changed from AC to DC. It 'looks' like the probe filiment voltage is 
6.3 V. Period. Is the 410C limited to using JUST the EA53, where the 
410B could use both???
Sooooo, it would 'appear' that the 2-01C cannot be used with the 410C. 
Is this correct? Man, I DO NOT want to buy a EA53!! Can I just 'drop 
the filiment voltage to 5 V? How long will a
2-01C last at 6.3 V??????

HELP!!!

I know that 'somewhere here', I have a ton of info on these great 
voltmeters. However, a divorce and 3 moves can scatter yoiur 'stuff'.. 
ha ha

tnx
ron
N4UE