Yes the repeater does work well with split antennas, no problems now
except for reduced TX coverage and a nice null towards the tower
opposite from the side mount..
Yes the dummy load was connected to the antenna port of the duplexer,
simulating the antenna. I am believing the antenna is near a perfect
50 ohm match because the VWSR is excellent and of course the PD-340-3
is made for the 140-150 band. I even have an isolator in line with the
transmitter to reduce the chances if stray signals coming back down the
antenna line and mixing with components in the PA.
I also don't think it's the duplexer making noise because it's nearly
new, or at least it was one of the last models made by Wacom (so what,
several years old?) When running full power and injecting a signal
through a Bird directional coupler, I can wiggle and shake all duplexer
interconnect cables, bang the plungers around and beat the dummy load
and not get any duplex noise.
I had the antenna on the ground laying on some plastic saw horses.
Dumped 100 watts into the thing and wiggled all the phasing harness
outputs and nothing. Took the old PD-220-2 Stationmaster and did the
same thing, flopped it back and forth a dozen times, not and squeak or
crack. Nothing loose on the tower. Isolators on all other
transmitters at the site.. Only does it when conditions are right.
Beats me. Mysterious garbage floating in the air.
Thanks for replies,
73, KC4FWC
> > The original post did say it worked OK on split antennas,
> > but also mentioned it worked OK into a dummy load (I assume
> > he meant connected at the antenna port of the duplexer, but
> > I don't think that was specifically stated).
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