[Elecraft] - K3 INTERFACE WITH LDG Z100A

[Dave B]

Morning...

Sounds like a job for an Arduino or PIC Micro, to interface between 
radio and ATU, and possibly with additional indicators/buttons etc...

ATU on one side (two I/O lines from the sound of things, with maybe some 
voltage level changing) and radio CAT interface on the other on a serial 
port (or whatever a K2/K3 or ??? needs.)

That is the sort of project where you may find someone else has already 
done something similar for other needs, so part way there, that you can 
adapt and build on.  (Google is your friend of course.)

Best of all, the needed development software is freely available (for 
zero cost) and the hardware is low cost too.  Plus...  LOTS of tutorials 
on-line to point you in the right direction...

 From the below, it sounds like the needed event sequencing is already 
known too, that helps enormously.

A nice winter project...

73.

Dave G8kBV



On 13/09/2022 20:03, elecraft-request at mailman.qth.net wrote:
> On 04/09/2022 09:37,elecraft-request at mailman.qth.net  wrote:
>> I looked up the Owner's Manual for the Z100A and it does not have
>> a "Molex" connector on the tuner.  The radio interface cable is a
>> miniDIN6.  The manual also does not list a cable for K3 (or any
>> Elecraft transceiver) - only the "IC106" cable for connecting power.
> The DIN connector has 4 active pins it seems - plus and minus power, a
> signal that should trigger the transceiver if you press the tune button
> to trigger the radio to make RF, and a signal that indicates the tuning
> process is complete.
>
> None of the indication signals directly interface with the K3.
>
> As others already said, I don't think the K3 has an interface for either
> of these signals. The procedure would then be:
> 1. reduce output power on K3
> 2. press TUNE on K2 to start generating RF
> 3. Press TUNE on tuner to make it start a tune cycle
> 4. Tuner will indicate completion of cycle
> 5. Press TUNE to stop K2 generating power.
> 6. Restore RF power setting.
>
> There is no integration between the K3 and the Z100A unfortunately.
>
> LDG makes many tuner models, some actually talk to the radio to do part
> of the above process automatically.
>
> My suggestion is to join the LDG group at
> https://groups.io/g/ldgelectronics
>
> 73, Geert Jan PE1HZG

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