Ryde receiver at GB3HV -
Posted: Sat Apr 03, 2021 6:49 am
I recently installed a Ryde Mk1 receiver on 437MHz at GB3HV and to be honest, the results are amazing!
The system comprises of a small 5 element beam on a rotator with a web interface so users can set the direction. A 2 mt length of Times 400 co-ax feeds a Pye bandpass cavity followed an SPF5043 pre-amp at masthead.
In shack, the 450 co-ax goes into a set of bandpass helicals from an old Key Radio 450 base station and a notch on 433.375 to try and reject GB3FN, the 70cms repeater located less than half a mile away. This then feeds the Ryde rxr set to scan 2MS and 333kS and has replaced an old Comaq SL30 STB.
The system is far more reliable when receiving the locals on 2MS, who used to regularly drop out with interference from a local PMR system.
G4CPE, who could not access HV previously, can reliably access the system over an 82km path and Mike G0MJW can get in with less than 1 watt over a 54km definitely non line of site path.
One further modification to be done is to add a method to enable users to trigger the OSD remotely - probably via DTMF.
The Ryde was a simple drop-in replacement for the old set top box and the performance is beyond expectations - if you haven't installed one yet at your repeater, I would really recommend it, and don't forget you can apply for BATC funding https://batc.org.uk/club-info/bursary-fund/
73 Noel
The system comprises of a small 5 element beam on a rotator with a web interface so users can set the direction. A 2 mt length of Times 400 co-ax feeds a Pye bandpass cavity followed an SPF5043 pre-amp at masthead.
In shack, the 450 co-ax goes into a set of bandpass helicals from an old Key Radio 450 base station and a notch on 433.375 to try and reject GB3FN, the 70cms repeater located less than half a mile away. This then feeds the Ryde rxr set to scan 2MS and 333kS and has replaced an old Comaq SL30 STB.
The system is far more reliable when receiving the locals on 2MS, who used to regularly drop out with interference from a local PMR system.
G4CPE, who could not access HV previously, can reliably access the system over an 82km path and Mike G0MJW can get in with less than 1 watt over a 54km definitely non line of site path.
- mjw hv.JPG (43.2 KiB) Viewed 3368 times
The Ryde was a simple drop-in replacement for the old set top box and the performance is beyond expectations - if you haven't installed one yet at your repeater, I would really recommend it, and don't forget you can apply for BATC funding https://batc.org.uk/club-info/bursary-fund/
73 Noel