[GreenKeys] Tube based loop supply

[Rdelgatto]

Hi Joe, Group,
I posted a good source for a bullet proof military loop supply. A few
of you already purchased some and I am sure you are happy as I know I am
with the ones I have. Joe you might want to give it a try to!
Just to let you all know while surfing the web I came across source of
USN 60 mil Teleprinter Power supplies. If you look up APEX ELECTRONICS
and scroll through the site you will find them. He is asking $50.00 ea.
and they are nice. I have 2 that I have been using for years.
Jack, K0TTY, you know where they came from!!
Enjoy
Bob
Message: 9
Date: Tue, 5 May 2009 22:51:42 -0500
From: "amourdutigre" <amourdutigre at kc.rr.com>
Subject: [GreenKeys] (no subject)
To: "greenkeys at mailman.qth.net" <Greenkeys at mailman.qth.net>
Message-ID: <000e01c9cdfd$f80c85c0$9c161e41 at win06v5>
Content-Type: text/plain;	charset="iso-8859-1"

Hi again,

One of my goals is to set up a completely tube (hollow state) RTTY station.
Got the ASR 28 and TT/L-2 (Courtesy of Jack K0TTY), and am in the process of
building a W2PAT AFSK device.

Now, I need to be aimed in the direction of a tube based loop powersupply
circuit without any solid state rectifiers. I have googled extensively and
have found nothing. (Presently, I am using a loop supply on loan from K0TTY,
and I have just bought a loop supply from Steve Hilsz. (I do not dislike
solid state, but I do want to have a completely EMP proof system, and I
simply like tubes.)

Once I get these things in place the next phase is a 40 Meter, single
purpose (RTTY) transmitter. I am thinking about a mono-band unit that would
simply be quite simple, without any audio circuitry. I am not an RF
designer, so I would need help with this from someone who is, but I was
wondering if a crystal controlled unit (rock bound) could be built with
enough of a fudge factor that it could be used for FSK.  It would be cool if
it could have a number of crystals to switch between. What is your thoughts
on this? Does anyone know if this has been done before?

Best and 73
Joe Herdler
KB0TXC
Greenkeys
TCI
/NNNN