[Elecraft] ant port isolation

[Eric Scace K3NA]

FYI --

   I made a quick test of antenna port isolation on a K3 here to look 
for a benchmark.

Main RX:
   Signal injected at RX IN BNC connector of -98 dBm.
   Pre-amp on.
   160m 1820 kHz: When the main RX was switched to Ant1 or Ant 2, and 
additional 64 dB of signal was needed to get equivalent output.
   10m 29750 kHz: When the main RX was switched to Ant1 or Ant 2, and 
additional 41 dB of signal was needed to get equivalent output.

These 64 and 41 dB isolation figures are typical for a single stage 
relay switching matrix.

When I have time, I'll do the same for the sub-RX.

-- Eric K3NA