[Elecraft] K3 band data lines

[Pierfrancesco Caci]

Thanks Bill. 
My point about the tx inhibit was that I plan to have a "manual
selection" button, and I was thinking that maybe it would be nice to
have a "fool avoidance" built in. The fool being me, of course. 

Pf


>>>>> "Bill" == Bill Frantz <frantz at pwpconsult.com> writes:


    Bill> I have built a similar switch controller. If anyone wants a copy of the details, please ask.
    Bill> Specifically: 

    Bill> - Just connect te band lines directly to the Arduino inputs. It works fine.

    Bill> - Don't know about cross band split. However K 3 power off and 60M look the same.

    Bill> - I don't bother. I don't change bands while transmitting. I'm not sure if the K3 even supports it.

    Bill> 73 Bill AE6JV


    Bill> 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?

    Bill> -----------------------------------------------------------------------
    Bill> Bill Frantz        | I don't have high-speed      | Periwinkle
    Bill> (408)356-8506      | internet. I have DSL.        | 16345 Englewood Ave
    Bill> www.pwpconsult.com |                              | Los Gatos, CA 95032


-- 
Pierfrancesco Caci, ik5pvx