I started a new thread for this as the most relevant was from 2010
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I have a site with a couple of highband vhf repeaters as well as a ham machine on 145.210 -600. One of the highband repeaters is on a duplexer at the bottom of the string with the other highband repeater and the ham repeater(ve6aah) using 2037 multicouplers.? My hope is to use another 2037 to allow APRS on 144.390 which is 220 kHz from the ham repeaters input.? rx/tx would be nice but I would settle for a rx only if I had to.? It has pretty good coverage already with an antenna on the roof of the building but the main antenna would be great.? The 2037 tunes up nicely to 144.390 after changing to 24" inter-cavity cables, with 3.7 dB loss.
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While tuning, I did not adjust the coupling loops although did check the notch depth of each cans port with the other being unterminated, being ~10.5 dB.? Thanks to the various posters from 04/21/10 who suggested that factor and much more.
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As its a mountaintop site, its pretty hard to test and tune in place but I do have a spare 2037 to emulate the repeaters input on the workbench.? Thats getting cabled up now.
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Is what Im trying to do even possible? Excessive losses on the APRS is tolerable.?
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Ross
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