[Elecraft] A mod. request for the K3 Band0-Band3 output

[Don Wilhelm]

  Luigi,

The switch between HF and TRN band decoding is determined by the state 
of DIGOUT0 (ACC pin 6) - see the 2nd column of page 19 in the manual.  
Add a pullup to this line and use it to steer which band decoder chip is 
selected.

73,
Don W3FPR

On 11/17/2010 12:21 PM, Luigi Casari wrote:
> Regards to all
> I am building an interface to decode the present signals on the Band0-Band3
> output.
> This using an IC CD4067BE, the intention is to have a positive tension on
> the various bands (for switch some rx preampl. or switch some antennas), a
> general PTT for the HF band and a PTT for the 50MHz.
> On the 144MHz I need a PTT  and a +12V on RX for the external preamplifier.
>
> I have the K144XV module and I have too the PR6 preamplifier for the 50 MHz.
>
> So the DIGIOUT1 signal is already used for the preamplifier, the question is
> as know when the K3 is on the 144MHZ seen that the BAND0 to BAND3 goes to 0V
> and this is the same condition used for 60m band.
>
> It is not possible to use TRN1-TRN9 because even they go out on the same
> pinof the BAND3 to 0  and they have address used in HF.
>
>