[aprssig] APRS UHF freq?

Bob Mueller bob at funautical.com
Tue Jan 24 14:25:50 EST 2017

I wish a national UHF channel would get established for APRS.  I think it
would be great to run 9600 baud on UHF.  I would really like to build a
digi that cross band digis from 1200 VHF to 9600 UHF.  Both directions.  It
seems that everyone is drawn to 2m FM for phone.  Whether it's club nets,
ARES nets, or Public Service nets.  They seem to always land on 2m.  I
think it'd be great to have a 70cm APRS option.  That way FM phone on 2m
does not de-sense APRS operations.  Or full duplex dual banders such as the
TM-D710G can continue to receive packets on the other band, while
transmitting FM phone.  Or transmit packets while listening to a net on FM

I'm not calling for every digi to get replaced with a cross band digi.  But
it would be nice to have a national 70cm frequency established.  So a 70cm
option can potentially be added to some of the digi's that are out there.
I think it would be very useful in certain cases.

--... ...--
Bob Mueller
bob at funautical.com

On Tue, Jan 24, 2017 at 1:08 PM, Robert Bruninga <bruninga at usna.edu> wrote:

> The UHF freq for APRS comes up every now and then.  Here is what I know.
> 1)      We  use 445.925 on UHF for both APRS voice channel and APRS UHF
> for events.
> 2)      Using operator-to-operator voice here avoids interference with 2m
> 3)      Also for some events, operating APRS combined with Voice Alert
> has value.
> 4)      I don’t think we want any dedicated permanent UHF links on 445.925
> 5)      445.925 is NOT an APRS frequency in southern California due to
> other uses
> 6)      There is no national UHF or 9600 channel that I know of.
> 7)      The only permanent APRS UHF net I know of is in the Pacific
> Northwest on 440.800 (or 440.875?) at 9600 baud.
> Bob, WB4APR
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