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Does it matter if the diplexer goes before the Amazon powered box or after.
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Yes, do it like my diagram in post 23. If the UVSJ diplexer went between the Amazon antenna and its power control box, you would need a special power passing UVSJ diplexer and you would still have only one output for a TV, so you would still need a splitter.
Some UVSJs pass DC power on the VHF side, and some pass DC power on the UHF side for a preamp. It so happens that the RS UVSJ passes power on the UHF side, but I still think you should put the UVSJ diplexer AFTER the Amazon power control box.
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If I go after, I would have only one Output from the Amazon Able antenna powered box
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That's all you need for the diplexer UHF input.
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then add a splitter after the diplexer to go out to both TVs.
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That's the correct way to do it.
If your 150 mile Antenna control box looks like the one in the attachments, then it does have two outputs. I still suggest you do it like the diagram in post #23, but you can try it at you own risk like this:
Code:
Amazon Ant > coax > 15 ft coax > Olevia
\ UHF DC pass /
RS UVSJ diplexer > control box >
/ VHF (15-2586) \
CH6 Dipole > coax > 75-100 ft coax > Samsung
If you can't find a Radio Shack store that has one, there are some 15-2586s on ebay; check the model number and age. Antennas Direct also sells a UHF/VHF diplexer that passes DC power on the UHF side:
https://www.antennasdirect.com/store...Combiners.html