[GreenKeys] Heathkit HD 3030 Terminal Interface

[Ian Litchfield]

Aidan,

Make sure you read the manual for the HD3030. I think it's described in the
build instructions. I haven't checked in a year personally.

I believe it can only be wired for RS232 or Current Loop not both and by
trying to connect the loop pins with rs232 wiring set. It will blow a
transistor.

Mine is nonfunctional and I have not gotten around to fixing it and
rewiring it for loop.

I believe the loop circuit should not lose a load lest it will blow stuff
too.

Others I'm sure have more experience however, and can give better input.

Thanks,
-Ian L.

On Sat, Jan 4, 2025, 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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