[Boatanchors] Johnson Electronic T/R Switch.

[Ken Hickman]

Hi Gang,

I obtained a Johnson T/R Switch, Catalog No. 250-39 about a year ago.
Haven't had
a set-up to use it until now.
The case get too hot to touch after a short time on! I used one many years
ago and
although it got pretty warm, I could pick it up.
I seem to recollect the gating tube was a 12BL7. This one which looks almost
new
has a 6BL7 in it.
Anyone have an manual and/or schematic? Help!
Take care,

Ken   N5CM