[R-390] R-392 solid-state mixer notes

[AI2Q]

A whole bunch of folks have e-mailed me asking about my solid-state mixer
"tubes" I put in my R-392. It's been awhile since I fiddled with these, and
a lot of project water has passed under the proverbial bridge since then.
But, if I recall correctly, I used El Cheapo Radio Shack MPF-102 MOSFETs, or
perhaps they were MPF-105 types.

Also, I used Sears/Craftsman No. 25024 cutoff wheels. I mounted the Dremel
motor in a vise, arranged so that the sparks fly away from you. I then
rotated the tubes by hand. I think the wheel as much melts the glass as cuts
it. You'll see the glass get red at the point of contact.

Good luck.

Vy 73, AI2Q, Alex in Kennebunk, Maine
       R-392, Collins R-390, Motorola R-390A

http://users.adelphia.net/~alexmm/ai2q.htm

 .-.-.