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idigg said:
Yes, but for your HR21-700 / AM21 combo, you need to move the BBC before the diplex .
You do not use BBCs when a SWM is installed.

Remove them from all IRDs.

...and yes your diagram should work. But, you can add the OTA directly to the SWM, and use that for the diplexer, if you'd like (as stated above).
 

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Stephens24 said:
The reason that I wasnt using the OTA input from the SWM is that my antenna will be an indoor attic mount inside and the swm will be outside.
The OTA Diplexor on the SWM isnt as good as the external ones. Or at least i recall a discussion on that. Your setup looks alot like mine I just use a power passing diplexor between the SWM and the PI since my Antenna wires are outside as well
 

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spidey said:
The OTA Diplexor on the SWM isnt as good as the external ones. Or at least i recall a discussion on that. Your setup looks alot like mine I just use a power passing diplexor between the SWM and the PI since my Antenna wires are outside as well
Just FYI. I did not see any real evidence the SWM diplexer was worse than a separate one. What people were forgetting is that the SWM already has a two-way splitter for OTA so if you use a four-way splitter on one of the SWM outputs you are essentially doing an eight-way split. If instead you put a two-way splitter on each of the SWM outputs each tuner would see one quarter of the signal. My own experience, with of course only my sample of one, is that doing this gives the same signal strength as putting a stand-alone diplexer in one of the SWM output lines and then a four-way splitter.
 

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texasbrit said:
Just FYI. I did not see any real evidence the SWM diplexer was worse than a separate one. What people were forgetting is that the SWM already has a two-way splitter for OTA so if you use a four-way splitter on one of the SWM outputs you are essentially doing an eight-way split. If instead you put a two-way splitter on each of the SWM outputs each tuner would see one quarter of the signal. My own experience, with of course only my sample of one, is that doing this gives the same signal strength as putting a stand-alone diplexer in one of the SWM output lines and then a four-way splitter.
Well...pre-SWM, I was using a 4 way splitter before diplexing after the BBCs.

After using the SWM with SWM1 split twice and SWM 2 split twice and had a 10%-20% drop in OTA "signal strength".
 

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idigg said:
Yes, but for your HR21-700 / AM21 combo, you need to move the BBC before the diplex .
BBCs are not needed and cannot be used when the SWM is used.

If the power spliters cover the frequency range (5-2100MHz I think), this should work. The splitter ports left unused should have a matching cap.
 
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