The problem is on the user end, if there's only 10 Khz between both TX outputs, and you're within a few miles of the repeater site, likely any DC to daylight ham transceiver will cave in when both repeaters are active.
John/N4SJW --- In Repeater-Builder@yahoogroups.com, DCFluX <[EMAIL PROTECTED]> wrote: > > I'd go with 50 to 100 kHz spacing from the analog channel and use > circulators for the transmitters and a spliter to allow operation > through the existing antenna and duplexer system, Like IBOC. > > On 4/1/08, johnmichaelwelton <[EMAIL PROTECTED]> wrote: > > We are investigating the possibility of adding 2M/440 DSTAR. At the > > university, we currently have the following analog repeaters at ~175 > > ft HAAT (in/out): > > > > 144.850 - 145.450 > > 449.825 - 444.825 > > > > We will have access to the roof of the new hospital (about the same > > HAAT), about 1 mile away and would like to add a separate DSTAR suite > > without interfering with the existing analog site. SERA has 3 freq > > band options for VHF DSTAR for example (in/out): > > > > 144.800 - 145.400 (600 KHz split) > > 146.480 - 145.080 (1.4 MHz split) > > 147.460 - 144.960 (2.5 MHz split) > > > > UHF for DSTAR generally follows the analog band plans, e.g. 442- 444 > > out, +5 MHz in and DSTAR pairs are interspaced with the analog pairs, > > e.g. 449.9875 - 444.9875. > > > > Could anyone recommend a strategy to pick new 2M and 440 DSTAR pairs > > that would provide the least interference for the existing analog > > repeaters above. > > > > Thanks > > John/N4SJW > > Charleston, SC > > > > > > > > ------------------------------------ > > > > > > > > Yahoo! Groups Links > > > > > > > > >
