[Elecraft] W2 Meter Question

[Vic Rosenthal]

I understand that you have the sensor connected to the vertical 
permanently. But when you transmit on one of the other antennas, it 
reads a very high SWR, even though out of the circuit.

What it sounds like is that the vertical is picking up RF from the 
dipoles. When they are selected, the coax to the vertical is either 
shorted or open, depending on the switch. The coax to the vertical is 
operating at a high SWR -- it is just being excited by the RF pickup, 
not the transmitter.

One solution would be to put the sensor in the line from the transmitter 
to the switch rather than from the switch to the vertical.

Vic/K2VCO

On 6/4/2014 8:51 PM, K8JHR wrote:
> 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.
>