Andy,
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?
73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County
On 7/7/2018 12:27 PM, hawley, charles j jr wrote:
If you have ever disassembled an alpha delta, you can see what it takes for an
attempt at isolation.
Chuck Jack
KE9UW
Sent from my iPhone, cjack
On Jul 7, 2018, at 2:13 PM, ANDY DURBIN <[email protected]> wrote:
I've been using Alpha Delta model Delta-4 switches for manual antenna
selection. I thought that having the ability to auto select the appropriate
antenna with my KAT500 would be a significant improvement for my station. I
don't have a K3 so I created a band decoder that drives the KAT500 band inputs
and now have automatic antenna switching. However, I'm unimpressed by the
isolation between antenna ports.
With the KAT500 switched to the dummy load I'm still decoding a local FT8
station on 6 m. The difference in the FT8 signal between dummy load and
antenna is about 19 dB. I have not found a specification for KAT500 port
isolation. Is what I'm seeing typical?
Thanks and 73,
Andy k3wyc
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