[Elecraft] K3 - Accessory Jack - How Many Wye Cables?

[Don Wilhelm]

Rich,

Power up your planned band decoder standalone and measure the voltage at 
its band data inputs.  If you see zero volts (or very close to that), 
then it will be OK as long as those inputs will not source too much 
current when the K3 band data lines are low.

OTOH, if you measure a voltage with the band decoder standalone, it may 
cause problems.

In a system with pullup resistors at the drivers, there is always a 
concern for noise introduced on the signal line with additional 
receivers, so even if your added band decoder works OK, keep an eye on 
the KPA500 band selection long enough to be certain there are no strange 
behaviors introduced by the added decoder.

73,
Don W3FPR

On 5/12/2014 12:43 PM, Richard Thorne wrote:
> Thanks for all the replies,
>
> I plan on connecting a band decoder to the 2nd wye and it only 
> receives/monitors the band data, it doesn't send anything back to the 
> rig.  So it looks like a 2nd wye should do the trick.
>