Quote:
|
Originally Posted by Dave S
I ran across an ancient 5" DuMont scope at a hamfest a couple of weeks ago. --Dave
|
When still in my early/mid twenties there was a "Huge, heavy, steel rail frame" Dumont scope with a
1-microvolt vertical sensitivity setting I used to check the residual noise of mercury batteries that supplied reference voltage to mandrels (sp?) in plotters. IIRC, the scope had a 100-kc vertical bandwidth. After cutting my teeth on 545's with CA plugins, it was quite an impressive hi-sensitivity performer.