GB3TV

GB3TV is situated on Dunstable Downs at 21 meters above mean sea level, IO91ru. The PA is a ‘20 Watt Block’, throttled back to about 12W. The antennas are full wave, silver plated Alford slots protected by some plastic drain pipe! A live stream of GB3TV can be viewed at the BATC.

Transmit

1318.5 MHz, with 1000ks/s symbol rate, 7/8 FEC, DVBS MPEG-2.

Local stations use 144.550 MHz for talkback.

Receive

• 1249 MHz, 1000 ks/s or 333 ks/s into a Ryde receiver via a 23cm Dual Alford Slot antenna.
• 437 MHz, 1000 ks/s or 333 ks/s, into a Ryde receiver, via a G8ADM Horizontal Loop

As of mid-2024, GB3TV also has a 70cm input on 437 MHz. It is hoped that the lower input frequency will make the repeater accessible to a wider range of users. An internet stream input is also in progress, making it possible to transmit signals through the repeater without needing any RF gear.

Access is achieved with a video signal with reasonable line syncs an a video level above black. Fading to black will cause the repeater to drop out.

Users

Stations that have been seen on the repeater include:

• G4CPE Arthur, Luton
• G3VZV Graham, Potsgrove
• G8XTW Phil, Leighton Buzzard
• G6JIE Dave, Luton
• G4WYO Ken, Kensworth
• G6OUA Bob, Luton
• G4ENB Clive, Luton
• G1JCC Ian, Luton
• G0WFT Don, Toddington
• G6RHL John, Shefford
• G7JTN Chris, Hemel Hempstead
• G8BQH, Aylesbury
• M0SKM Steve, Houghton Regis
• GB2BP Bletchley Park Club, Bletchley
• 2E0EAZ Ted, Dunstable
• G4IYT Matt, Leighton Buzzard