[R-390] R-392 tubes

[AI2Q]

Here's a note I sent in January of 2002:

"I confess! I've poked JFETs into both 26C6 mixers on my R-392, and those
24-V stages work really well. I used a Dremel tool cutter to scribe the
glass of 7-pin miniature tubes, cracking them open and removing the innards.
I then soldered the JFETs with drain source and gate connected to the old
plate, cathode, and grid leads, respectively. After inserting a label with
my callsign on it, I then glued the glass envelopes closed. I popped 'em
into the R-392, where these solid-state jobbies perform flawlessly. ..."


Vy 73, AI2Q, Alex in Kennebunk, Maine
http://users.adelphia.net/~alexmm/ai2q.htm

 .-.-.