[Milsurplus] [MMRCG] Considering GO-9 Transmitter Power Options.

[Robert Downs]

It is possible at least theoretically.  The first models of each were built
by Westinghouse, the TBW in 1939 and the TDE in 1942.

Robert Downs

-----Original Message-----
From: milsurplus-bounces at mailman.qth.net
[mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of Ray Fantini
Sent: Sunday, September 1, 2019 19:36
To: milsurplus at mailman; MMRCG at groups.io
Subject: Re: [Milsurplus] [MMRCG] Considering GO-9 Transmitter Power
Options.

The original 800 cycle power supply keying was very stiff for the day with
little variation between key up and key down.  Building a modern supply at
60 cycles results in having to use larger filter capacitors and a very
annoying chirp along with a mysterious chirp after letting the key up. I had
to use -120 volts where the red circle is shown to cut off the tube when the
key is let up. Very similar to what goes on in the TDE; always thought the
TBW/GO was a striped down TDE, wonder what came first?

Ray F/KA3EKH