[GreenKeys] HAL ST-6000 help needed

[Greg Miller]

Hello all,
    I'm trying to get a Hal ST-6000 up and running here for my newly 
acquired 28KSR.  After troubleshooting a bad IC, I have the 6000 working 
just fine for receive and it drives the 28 FB.  However, when I try to send 
with the 28 and the 6000, something odd happens:  The moment I press a key 
on the TTY, the 6000 shifts to space (I think) and just sits there.  Also, 
the TTY free-runs.  If I recycle the power to the 6000 a few times, the 28 
gets happy again and sits patiently for the 6000 to send it something.
    Am I doing something wrong here?  Like I said, it receives great so I 
think I have everything setup correctly.  I'm guessing it's another bad IC 
somewhere, but I thought I'd ask before diving in with the logic probe 
again.  Any suggestions?  BTW, I've already replaced all of the electrolytic 
and tantalum caps (I've had a lot of bad experiences with tantalums!)
    Could the 28 have a problem?

    Thanks and 73,
    - Greg K2GTM