On Aug 14, 2014, at 1:09 AM, Chuck Guzis <cclist at sydex.com> wrote:
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.
And then to stretch your greek, Philips had an ?enneode?. I don?t remember the part
number or its purpose, but the name is distinctive.
paul