[Elecraft] [KAT500]schematic

[ab2tc]

Hi,

How did you measure that? They are very different from my measurements. Here
is what I did:

Put radio TX in Test mode to protect the XG3.
Connect XG3 to antenna 1 at -74dBm on 10m.

Measure:
port 1: -76dBm
port 2: -107dBm (port connected to another antenna switch which presents a
short circuit).
port 3: -110dBm (port connected to dummy load from Ridge Electronics).

The measurements are taken with LP-Pan/NaP3. That's a mere 34dB in the best
case. BTW the numbers confirm what I can easily observe during normal
operation. What are other people seeing? 

AB2TC - Knut


Phil & Debbie Salas wrote
> “...I have noticed that the port-to-port isolation between the 3 antenna
> ports is rather poor...”
> 
> I measured about 42dB isolation on 6M from port 1-2.  And this stays
> pretty constant down to 15M and then gets better fast.
> I measured about 61dB isolation on 6M from port 1-3.  This gets better
> very fast, going to 75dB on 10M.
> 
> I use ports 1 and 3 for my two HF antennas (43ft vertical and 20/15/10M
> rotatable dipole), and put my 6M beam on port 2.
> 
> Phil – AD5X
> <snip>





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