[Elecraft] K3 band data lines
Bill Frantz
frantz at pwpconsult.com
Sun Feb 7 12:47:38 EST 2016
I have built a similar switch controller. If anyone wants a copy of the details, please ask.
Specifically:
- Just connect te band lines directly to the Arduino inputs. It works fine.
- Don't know about cross band split. However K 3 power off and 60M look the same.
- I don't bother. I don't change bands while transmitting. I'm not sure if the K3 even supports it.
73 Bill AE6JV
On 2/7/16 at 3:38 AM, pf at tippete.net (Pierfrancesco Caci) wrote:
> Hello,
> I'm trying to make my own interface between the band data lines on the
> accessory connector of the K3 and the remote antenna switch.
> I have a few questions that I hope you can help me with:
>
> - is it safe to just poll the band lines with the arduino digital input
> pins? I understand that my K3 is new enough to have the internal pull
> up resistor. Should I put an isolation device inbetween?
>
> - does the band data as provided by the K3 always track the TX VFO?
> Should I expect some weird situation if I ever try to do cross-band
> split?
>
> - should I bother with asserting TX Inhibit and keep it set for a few
> milliseconds when I detect a band switch?
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Bill Frantz | I don't have high-speed | Periwinkle
(408)356-8506 | internet. I have DSL. | 16345 Englewood Ave
www.pwpconsult.com | | Los Gatos, CA 95032
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