[Elecraft] [KAT500]schematic

[Geoffrey Mackenzie-Kennedy]

Knut,

FWIW I found that the isolation between the ANT 1 and 2 ports of my KAT100 
on 15m was only approx 40db.  To increase the isolation between ports, not 
only did I have to add a relay to ground the port not in use, but I also had 
to replace the relay-to-port unshielded wiring with coax.

Sounds as though you could have a similar problem with the KAT500.

73,
Geoff
LX2AO


On January 01, 2013 at 6:53 PM, Knut AB2TC wrote:


> 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