I did in fact misunderstand that a 6m antenna was still connected to one
of the other ports ... I read it that they were open. You could get a
rough idea by listening to the local and removing the antenna(s) from
the KAT500 and maybe terminating the unused ports in a PL-259 with a 47
ohm resistor. I don't know if the unused ports are shorted or grounded
by the relays, I never traced it out when I had my KAT500. I did like
the antenna selection capabilities however. [:-)
73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County
On 7/7/2018 3:32 PM, ANDY DURBIN wrote:
" From your explanation, it sounds like you've switched the active KAT500 antenna
port to a dummy load on which you're hearing a local 6m station. If that's correct, I
don't believe you're looking at port isolation, you're just receiving a local guy on your
dummy load, which wouldn't be at all strange. What did I misunderstand here?"
I don't think you misunderstood anything but I don't know how you decided the
signal is through the dummy load rather than coupling in the KAT500 from the
antenna port to the dummy load port. I don't remember hearing local stations on
the dummy load when using the Alpha Delta switch.
I suppose the only way to get good isolation data will be to do a sweep of the
KPA500 and Alpha Delta switch with the SA+TG. If I do that I'll share the
results.
For now I'll enjoy the automatic antenna switching.
73,
Andy k3wyc
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