[NLRS] 33CM
Doug Reed
n0nas at amsat.org
Tue Jan 28 00:35:09 EST 2020
Nope, no typo, but I did hit send too early.
<https://mnrepeaters.org/900bandplan.pdf>
You can rest assured that nobody is paying attention to that suggestion anyway.
The alternate FM Simplex frequencies at the top of the band is also
correct as written, in the 927 range. That is close to the 928
commercial band. The built-in RX filters start to fall off below that
and you probably will not RX anything below 920MHz. Unless you remove
the original filters and replace them with 900-930MHz filters, a
standard commercial FM transceiver will not RX near 902. All this is
discussed on various 900MHz FM web sites.
Some of the commercial radio conversion sites talk about making mods
to 800MHz trunking radios to bring them up into the 900MHz band, but
the conversion still requires replacing the RX front end filter. This
might have been common 20 years ago, but today there are usable radios
olike the Kenwood TK981 and others. OTOH, there are currently only a
few operating 900MHz FM repeaters in Minnesota and Wisconsin. They are
all up around 927MHz output with input 25Mhz lower as per commercial
standards. The amount of activity is very slight and I don't expect a
lot of overlap with the few UHF contests every year. Hams in the
Duluth area can say if there is any noticeable interference from the
927 repeater users.
73, Doug Reed, N0NAS.
--
I vote the Second Amendment FIRST!
The things they do not tell you are usually the clue to solving the problem.
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