[GCARC] Need some antenna help

[Lou Bonaventura]

Hi all,

I'm looking for the antenna gurus here hi hi.

In my attic (yeah, HOA) I have (1) 2mtr vertical, (1) 2mtr/70cm 
vertical, and (1) 6/2/70cm vertical antennas.

The 2mtr is connected to a FTM-200D for Wires-X PDN (50w, on 144.975 MHz).

The dual band is connected to a FTM-6000R (50w).

The triband is connected to a 991A (50w).

Whenever the PDN is active, the other radio's tx/rx is reduced to 
practically nothing, even if the PDN is just receiving. I use my HT to 
connect to the PDN, or my mobile in my Jeep when I'm not at the house.

If I have the PDN in Direct Mode there is no issue, just when it's in 
Access Point Mode.

I'm pretty sure it's some type of antenna coupling, one feeding into the 
others, but I'm not sure how to resolve it other than getting rid of 
some radios, but I don't want to do that.

The 2mtr Wires-X antenna is 10+ feet from the dual band and about 25 
feet from the triband.

The dual band is about 10+ feet from the triband.

Yes they are all in a line from each other due to the roof peak in the 
attic.

The 991A has no interference on lower bands and that is on a tuner 
connected to my outside gutters, so no problem there, but I'm sure it's 
still feeding RF into the radio.

Any thoughts on resolving this issue before I burn something up? I don't 
like that it's feeding into the other radios.

Thank you and 73!
Lou


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Savannah, TN / Sewell, NJ
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