Receiving GB3UHF

Monitoring the beacon using WSJT JT65B mode

The use of JT65B enables the beacon to be received and monitored at extreme ranges, even when inaudible in a conventional receiver bandwidth. The use of JT65B will ensure that the user at long distances from the beacon can see if there is any enhancement to propagation, or if propagation conditions have deteriorated. It thus also allows automatic monitoring of the beacon over a period of time.

Software to decode the JT65B is easily obtainable on the Internet at the WSJT website www.physics.princeton.edu/pulsar/K1JT/

To decode the JT65B identification, tune the carrier to obtain a tone of 1270Hz with the receiver set to USB, and the dial frequency reading 432.42873 MHz . The JT65B will then be tuned in correctly.

GB3UHF as received on JT65B by Colin G3SPJ

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