[GreenKeys] Heathkit HD 3030 Terminal Interface

[Jeffrey Golas]

One thing Ive found a lot with TTY gear is that for receive, the  TU device is often expecting a high-level "amplified" signal, basically from a speaker output. Dont ask me how many times Ive hooked something up to a "data out" port on the radio which is fixed 1v 600ohm and pull my hair out because its deaf as can be (while occasionally copying a word or two to add to the confusion.)

The output on the other hand is often low level and OK.

Another thing to check: On your radio, FSK mode might be wrong; with AFSK its regular audio youre sending, so try leaving it in SSB mode instead.

Jeff KC3GJX



> On Jan 4, 2025, at 1:15 PM, Aidan Riley <w9pog73 at gmail.com> wrote:
> 
> 
> Good morning all! 
> 
> I was hoping to get my station ready for the RTTY Roundup today, but I don't think I'll be making it in time. I'm having some issues trying to use a Heathkit HD 3030 to connect my model 19 to a Kenwood TS440 and I'm not sure if they stem from equipment issues or just improper connections. 
> 
> I've connected pins 12 and 13 to the AFSK IN and AFSK OUT on the Kenwood, selecting the FSK mode. I tuned into the ARRL RTTY bulletin last week and was unable to get the TU to detect the signal - neither mark nor space lit up on the display and the teletype connection did not move. 
> 
> I've also had issues with the connection for the model 19. When I turn the TU to "Send", it indicates Mark with the closed circuit but does not change to space when the circuit is opened. 
> 
> I'm not sure where to start with this and would appreciate any advice! 
> 
> 73 and thanks, 
> Aidan W9POG
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