John, Thanks for the suggestion. However this is NYC, every allocation is in use, and we will be extremely close distance wise to the lower adjacent, even at 12.5.
I can get into more details off list if you wish. Gary KB2BSL From: dstar_digital@yahoogroups.com [mailto:dstar_digi...@yahoogroups.com] On Behalf Of john_ke5c Sent: Thursday, May 27, 2010 6:58 PM To: dstar_digital@yahoogroups.com Subject: [DSTAR_DIGITAL] Re: Radios needed > The Staten Island Digital Group is looking to purchase a few > spare/replacement radios for its WG2MSK D-Star (G4ULF) repeater system. > > One of the radios in use seems to be a bit flakey, and the SM-50's I > purchased at Dayton turn out to NOT be narrow band. I've been thinking about this for an upcoming project. Unless you have a nearby adjacent channel repeater, in this application - one fixed channel operation, why do the radios need to be narrow band? You can throttle your transmitted bandwidth by adjusting your modulator drive, and your S/N may be very minimally degraded by adjacent spectral noise, but that may well be imperceptible. The only issue might be synthesizer steps falling off your frequency, but that can be remedied by a VCO adjustment. Thoughts? 73--John
