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I have a question about antenna arrangement to minimize multi-band interference and band rejection.
I just purchased a 6700 and want to add a DEMI 2MLDPArC amplifier for 2m, a Q5 L222-28r2 Transverter for 220 MHz, and a Q5 L432-28r2 Transverter for 430 MHz operation. I have VERY limited room and would like to place all four antennas on top of the same 30 ft telescopic mast placed in a cross layout. Each arm of the cross is 1m from the center, for a total of 2m apart on each arm of the mount and 1.4m diagonally to the adjacent antenna. Based upon your knowledge and experience, will I have interference between antennas and transverters? Is there enough band rejection in these various transverters and 6700 to reject the fundamental and the harmonics of the other bands? Unfortunately I am not able to have vertical separation of the antennas and have limited ability to have horizontal separation. The telescopic mast is 8ft tall in it’s collapsed position and 30ft in the extended position.
I have not yet purchased the antennas, but am planning: the MFJ-1796 that operates on 40m. 20m, 15m, 10m, 6m, and 2m for HF, and Cushcraft antennas ARX-450B for 450MHz, ARX-220B for 220 MHz, and ARX-2B for 2m operation. I am already considering not installing the 2m components on the MFJ-1796 so I don’t over-load the HF if I am operating the 2m through the XVTR port/Rx ports.
The plan is to have a variation of the posted full duplex 2m/430Mhz that is posted on the website. The 2m would always be received through RX A and the 220 and 430 would be switched into the RX B port.
Do you think this will work and is the antenna separation and band rejection in the transverters adequate?
Thank you so much for your assistance!!!
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