[GreenKeys] Dovetron 1000T

[Tom Hunter]

I was given a Dovetron 1000T last summer. (That is the military version
with all BNC connectors.) I finally got room on my bench to  check it out.
I am getting tones through the level pot but no cross pulse on the LED
display.

I badly need a schematic for it but cannot find one. Is there any chance a
greenkeyer can help me with a pdf of the schematic

The new loop current meter on my bench helped me get my old Dovetron
working. That is the one that after operating 24/7 for about a year burned
out a plate-through in the loop circuit. A couple days ago I could not get
more than 50 mils out of it. I finally tracked it down to my loop which
measured about 1000 ohms.
I finally broke it down to a model 15 pulling magnet - 200 ohms, a 15
holding magnet -  50 ohms, my newly  installed SB-1210A - 600 ohms and the
loop wire - 150 ohms. Of course the big problem was the SB-1210A which has
a 600 ohm wire-wound resistor and 1500 0hm pot in every  channel. My
channels 1, 2 and 3 are remotely powered by TU's so I shorted the resistors
int those channels and made sure the pots were set to 0 ohms. Problem
solved. Old Dovetron re-asssembled and ready to be re-installed.


If ITTY goes down, my news stream should still be up.
http://n3crk.ddns.net:8000/tty


Note to Harold: I have an NOS model 15 re-inker with a little instruction
sheet. I have been looking for it for several days. If I ever find it, I
will scan the instructions and post it to the group.


Tom N3CRK
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