[Elecraft] W2 Meter Question

[K8JHR]

Greetings -

I recently assembled and installed the W-2 SWR/wattmeter.


Background:

I have several antennas.  I have an A/B switch to select either a 
vertical, or one of several dipoles further selected using a remote coax 
switch.  The sensor is on the branch with the vertical.  I use a linear 
amp at 500 watts when net control for a Brand X rig owners' net.


Question/Problem:

When using the vertical, the meter works on the A side of the switch 
works properly.  But, using any of dipoles, on the B side of the switch, 
it goes crazy and all the diodes light up.  It only does this when the 
amp is on line.  I tried re-routing the sensor cable with no advantage.

Any ideas?   Thanks in advance.


=====================  K8JHR  ========================