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  QSL image for GB3BUX

GB3BUX England flag England

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The GB3BUX VHF beacons are located just to the south of Buxton in Derbyshire, England, locator: IO93BF

GB3BUX operates on exactly 50.000.0 MHzand 70.000.0 MHz.

The antenna system is omnidirectional with horizontal polarization. The twin stacked turnstiles arecoupled via mast-mounted ATU's at about 15 feet above ground level. Each beacon operates at 25 watts ERP.

Both beacons transmit the same sequence, which is locked to the 60kHz MSF Anthorn (was Rugby) time and frequency standard. The keying sequence allows users to examine the signal at 10 sweeps a second on an oscilloscope for propagation studies. During each second, there is now a 10 millisecond carrier break every 100 milliseconds, with a 40 millisecond break on the second. The callsign identificationsare - "GB3BUX" on the minute and "GB3BUX IO93BF" on the five-minute mark.

Thebeacons are excited from the same RF source, which is a precision 5MHz frequency standard divided down to 10kHz for comparison and locked to the off-air60kHz carrier from the MSF station. The 5MHz is doubled to 10MHz and distributed to each beacon. The 50MHz beacon uses a x5 multiplier and the 70MHz beacon a x7 multiplier. This affords RF driver accuracy locked to the 60kHzMSF standard. In the event of a mains power failure, the system will switch over to standby batteries.

The beacon keeper is Nick, G7EKY, on behalf of the Buxton Radio Amateurs.

Latest News - March 2014

As a result of the Jan/Feb 2014 storms, the 50 MHz antenna system has sustained a large amount of damage. The beacon remains operational temporarily on very low power. Replacement materials are currently being sourced and it is hoped that the 50 MHz beacon will resume its normal status by May 2014.

The 70 Mhz system is currently operational as normal.

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Last modified: 2014-03-25 17:42:39, 2390 bytes

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