30 Nov
2020
30 Nov
'20
7:30 p.m.
Fabrizio IU5GEZ wrote: "The R7a is indeed at 145.7875 Mhz with a bandwidth of 12 Khz there shouldn't be any interference (in theory). Have you checked which repeater is in your (our) zone ?" Remember due to Doppler shift the ISS signal can be as low as 145.7965 MHz.
While the Necessary Bandwidth of the repeater on R7a would be about 11 kHz the FM sidebands will extend beyond that and make it impossible for any local stations to receive the ISS downlink.
It is unfortunate IARU Region 1 chose to put a repeater channel so close. 73 Trevor M5AKA