Date sent: Mon, 18 Sep 2000 19:04:27 -0700
From: measures <2@vc.net>
> >As I mentioned to Jeff, g-g would not be considered for this tube.
> >Neither would upper HF (these things are only rated for 30 Mhz max
> >anyway).
>
> Perfect. No VHF suppressor needed.
Not necessarily true.
Tubes with low operating frequency limits are almost always the
worst tubes to stabilize.
The reason the max operating frequency is so low is because the
leads are long and somewhat thin and elements sometimes large.
Long leads with lots of stay C makes a nice oscillator, and may
require 1930's suppression technology.
73, Tom W8JI
w8ji@contesting.com
--
FAQ on WWW: http://www.contesting.com/FAQ/amps
Submissions: amps@contesting.com
Administrative requests: amps-REQUEST@contesting.com
Problems: owner-amps@contesting.com
|