[GreenKeys] ST-6 stuff

[telegrapher@att.net]

Thanks to all who responded to my comments about the levels to and from
the radio out of the ST-6.

I know that there are supposed to be a pair of RCA jacks on the back of
the unit marked 20 mV and 150 MV for AFSK output.  I t does have an FSK
jack tho.  My first ST-6 had that and i used the 20 MV output to drive
the Drake t-4X.  Fine transmitter for Rtty i might add as was the R4B
for reception.  Should never have sold that pair.  Anyway......

Strangely on the back of this unit there are no RCA jacks or anything
else for AFSK output.  How about them apples!  Yep, i agree that there
have been numerous versions of the unit, some with and some without. 
This one doesn't even have a SN stamped or marked on the back
dataplate.  Makes me wonder.  However it does have an RS-232 connector
mounted just under the lip of the lid on the back panel.  Thats probably
where the AFSK comes out although i haven't chased any wiring to/from it
yet.  Actually never gave it a thought.  I'm sure there is an AFSK board
inside the unit.  It was the board farthest to the left when looking at
it from the front.  

I do have the manual for i think at least 2 different versions of it abd
an extra XTK-100 board if it turns out that i need it.  In the meantime
i'll have to pull it out of operation (receive only at this time) to
chase the wiring from the AFSK board to see where its going.  At the
very least if necessary i'll drill a hole in the back panel and mount an
RCA jack then run a piece of coax to it like its supposed to be.  Be
interesting to see what the RS-232 jack is wired to and how.  

Like i said before, if worse comes to worse i'll run FSK instead of
AFSK.  You'll never know the difference.

Thanks all for the responses and suggestions.

On another note, i did find a store locally in Phoenix that has the
fuses necessary to repair the IRL-FSK-1000.  They are a 3AGX 1/4 amp X
250V 8AG.  DIgikey also has them.  Next will be to get an adapter of
some sort to convert the Dovetron loop keying circuit from + - 12V to
the HV 60 ma loop current.  Then i'll be TU poor!!!!!!

Larry
W0OGH