[GreenKeys] 1203

[Tom Hunter]

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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