[Elecraft] [KAT500]schematic

[Phil & Debbie Salas]

"..Ah, so you measured loss directly from, say, port 1 to port 2 with a VNA
(vector network analyzer)...."

I should have been clearer.  I connected the VNA output to Port2, the VNA input to the radio port, and I selected Port 1.  So isolation measured was Port2 to common when Port1 was selected.  Then I did the same measurment, but connected the VNA output to Port3, and the VNA input to the common with Port1 selected so I could see isolationf from Port3 to common with Port1 selected.  Email me and I can provide those scans if you'd like.

Phil - AD5X