13 Aug
2014
13 Aug
'14
10:09 p.m.
On 08/13/2014 06:54 PM, Brent Hilpert wrote:
Of course, the notion of using more than one grid for
control goes back to heterodyne mixers, and other apps, well before computers.
Sure, the pentagrid converters, improved version over the old autodyne
mixer.
There was also the 7A8, 6-grid octode and well as the 6K8, triode-hexode
sharing the control grid.
Lotsa variety.
--Chuck