km1h at jeremy.mv.com
Sat Dec 1 16:45:41 EST 2007
----- Original Message -----
From: "Barrie Smith" <barrie at centric.net>
To: "Discussion of AM Radio" <amradio at mailman.qth.net>
Sent: Saturday, December 01, 2007 2:27 PM
Subject: [AMRadio] Building
Well, I was building a new HV power supply, until I had my gallbladder taken
out last week! Not supposed to lift anything over 20 lbs for a month.
It's a resonant-choke supply. I was just to the point (with a bunch of
taking out and putting in of parts) of drilling the mounting holes and
finishing it up.
Now (due to a wonderful fellow on this list, whom I'll name if I get
permission), I'm going to start working on an RF deck using a pair of
These tubes are a cross between a 100TH and the 250TH in a small,
strangely-shaped envelope. Should be just right for 300 easy watts out.
They are a 100TH repackaged for radar use in WW2 and use a 250TH filament
for sustained peak emission. It was also designated the 100TS by Eimac.
An OT ham down the street from me in the 50's ran a pair at 1KW input on 20
CW, it was fun watching those plates glow!
Now I'm thinking about a modulator.
Why not 2 more 127A's? With a window in the rack panel you can watch the
plate color with modulation.
BTW, Hello Norm, up in Kalispell. I'm just down the road in Missoula,
73, Barrie, W7ALW
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