27 Apr
2016
27 Apr
'16
4:57 a.m.
On Apr 27, 2016, at 12:49 AM, Jon Elson <elson at
pico-systems.com> wrote:
On 04/26/2016 09:47 PM, William Donzelli wrote:
There were also "Compactrons", 12-pin tubes kind of extending the 7-
and 9-pin submini tubes.
Some of them had at least 3 elements in one envelope.
European tubes are easy to evaluate in that respect because the letter codes designate
what's inside. I remember the EABC80 (not sure that's the correct number), which
is a diode plus double-diode plus triode. Intended application, if I remember right, was
FM detector (discriminator, double diode), AGC detector (single diode) and audio preamp
(triode).
paul
What was
the highest level of integration in a single envelope?
Perhaps Selectrons.