There were a few others, as well as some RF devices with the tuned parts inside the bulb. There were also some oddball types made for weather balloon use that had the whole transmitter circuit as one unit.
-- Will On Apr 26, 2016 6:30 PM, "Chuck Guzis" <ccl...@sydex.com> wrote: On 04/26/2016 12:40 PM, Paul Koning wrote: > This sort of stuff doesn't seem to be all that common; I haven't seen > it elsewhere. Multiple tubes, like dual triodes or triode/heptodes > are pretty common, but those are just the active part. The only "passive in the tube" examples I can think of in US manufacture are simple between-unit resistors, such as the 6N6. --Chuck
