wrote:

Failing that, converting the beasts to a transmitting tube of some
sort seems the only way to go,as sweep tubes are a thing of the past.
Apparently they take a lot of different internals from audio types,
which are the market today.

Yes, I grew up watching folks changing old surplus military gear to
take cheap commercial sweep tubes. Now I am watching people converting
cheap commercial gear to take surplus military sweep tubes....
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."