It is planned to add additional SDR hardware to receive the 432-435 MHz part of the band in the future.
The 23cms system uses a 13 element yagi with a mast head narrow pass band filter followed G4DDK VLNA preamplifier. This feeds an Airspy SDR which is locked to a 10MHz Leo Bodnar GPS frequency reference.
The main purpose of this SDR is to monitor for tropo propagation to the south of the UK via the Azores high pressure zones, (the antenna heading is 213deg.)
GB3MCB, the Cornish 23cms beacon, can be heard on 1296.860MHz (actually 1296.856MHz in September 2022).
The 13cms system uses a 21 element yagi with a mast head SSB Electronics 2320 to 144MHz down converter with an external 90.66667MHz local oscillator signal generated by a Leo Bodnar frequency reference locked to GPS. This feeds an AirSpy SDR which is locked to a 10MHz Leo Bodnar GPS frequency reference, (shared with the 23cm system).
Like the 23cm system the 13cm system is to monitor tropo propagation to the south of the UK via the Azores high pressure zones, (the antenna heading is 213deg.).
Under normal conditions no beacons are within range, the nearest is GB3SCS on 2320.905MHz.
More information about the WebSDR software can be found on www.websdr.org