[GreenKeys] 1203

[Jeff G]

I think on mine, which is a SB-2244 that was intended for crypto gear, I
wired the set terminals to the corresponding misc port, so I could then
plug in a fixed teletype from the front, then I have both looping jacks OR
I can easily patch the machine to another loop without removing the main
cable.

If anyone has parts from one of these (specifically the knobs and
rheostats) I'd love to convert the crypto loops on mine to standard loops.
I'd need 3 rheostats and 3 knobs, then it basically becomes an SB-1210.

Or if one of these are still available I'd be interested in one.

Jeff



On Tue, Apr 4, 2023 at 12:45 AM Tom Hunter <tomhenryhunter at gmail.com> wrote:

> For anyone who buys a 1203 from R.H. Goff make sure to download the book
> from navyradio. It is a small book but it is essential.
>
> Even with the book it took me nearly a week to install my 1210 and work
> the bugs out.
>
> Now I like it very much.  I have loops 1, 2 and 3 wired for remote power
> from three terminal units with built-in loop supplies. 4, 5 and 6 use local
> loop power. I plan to key two of those with relays, I have a 120 VDC power
> supply that is capable of running those three loops with ease.
>
> I always keep one locally powered loop free for testing individual
> Teletypes,
>
> For remotely powered loops be sure to short the appropriate fixed
> wirewound  resistors. The remotely powered loops must be wired the reverse
> of the locally powered ones to have the meter read  to the right on all
> loops.
>
> I wired my Teletypes to the "set" jacks. The abiIity to patch is amazing.
> I also chose to wire my "misc" jacks into each vertical loop to give me an
> extra patch point. I have two excellent external meters that I patch there,
> so I can meter three loops at once. They also show me that the meter on the
> my 1210 is not very accurate. It reads low.
>
> Test each loop as you wire it. Then kill all loop supplies as you wire the
> next Loop.
>
> A few Tips learned the hard way!
>
> Tom N3CRK
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