[Elecraft] K3 and Band Data

[Don Wilhelm]

Charles,

There are no CONFIG settings related to the band data outputs.

What are the characteristics of the inputs of your external device?
The K3 band data outputs have pullup resistors to provide +5 volts or 
zero volts to an external device.  If that device requires +12 volts and 
zero volts, it will not work.
I might also point out that some early K3s do not have pullup resistors 
internally, but provide an open drain output.  Those need external 
pullup resistors to +5 volts in the external device or installation on 
the internal resistors in the K3 - the internal resistors are documented 
as part of the K3ALC Mod.

Do you have any other device (such an the KPA500 or other amplifier) 
connected which also wants to use the band data lines.  That can 
complicate the addition of another device on the band data lines.

73,
Don W3FPR

On 12/21/2015 8:20 AM, Charles Yahrling wrote:
> hello all and merry xmas!
>
> For various reasons I need to interface an external device with Band Data
> from my k3-100 via the ACC port.  The cable I have is sending the correct
> pin signals to the device, which expects Yaesu Band Data compatible
> protocol. AFAIK and can verify on the web Elecraft 0123 band data is the
> same as Yaesu ABCD.
>
> But so far no joy at the device.
>
> According the my late-model K3-100 manual (Feb 2015) I have all the
> necessary mods from the factory.
>
> I  want to verify I have not omitted any CONFIG settings.  I have left
>   KIO3 to the default of normal, tho I tried he others with no success. .
> AUTOINF is not relevant as I am  not using serial port rig cat, so it is
> left at the default of normal.
>
> Have I missed any settings?
>
> tnx in advance