[Elecraft] KAT500 antenna port isolation

[Fred Jensen]

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?"
>
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> 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.
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> 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.
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> For now I'll enjoy the automatic antenna switching.
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> 73,
>
> Andy k3wyc
>