10 Jul
2007
10 Jul
'07
10:47 a.m.
If you want to use a neon bulb (or a gas triode) as a
sawtooth
oscillator (one of the more useful aspects of a relaxation
oscillator), you can improve the linearity of the charge ramp by
using a very high 500vdc or more) supply voltage and a large series
resistor.
I have a number of new RCA 884 and 885 tubes for just this purpose, if
anyone needs them. I want to get rid of them, as they are really slow
movers. I may also have DuMont 6Q5Gs new.
--
Will