12 Jul
2007
12 Jul
'07
3:25 p.m.
From: "Tony Duell" <ard at p850ug1.demon.co.uk>
Yes, I've used these for a few experiments with oscillators and frequency
dividers - never seem to get much effect from the second grid though - I
suspect I need better regulated supplies, but it may come into its own in
ring counter circuits.
Jim.
> You can also look out for tetrode thyratrons -
these have an extra
electrode
that can be
used to control the trigger point to some extent. The are
available as heated and cold cathode versions.
IIRC, the very common 2D21 (EN91 in Europe) is a hot cathode tetrode
xenon thyratron.