The New GB3UT Repeater

currently under construction

Latest AO-100 Dishes

1.2m +helical feed 2.4GHz Tx 1m + pll lnb 10.4GHz Rx 30 Watt 2.4GHz remote controlled PA, 3W driver in radio room in house.

The building of a replacement GB3UT repeater proceeds. It will be a DATV transmitter primarily, but with Analogue reception as well as Digital. Will use initially a DTX-1 which I have, for 4mS /sec Mpeg2 transmission and various receivers including a BATC Ryde for narrow band reception. Arduino Uno used for repeater logic , including speech Info, and morse Ident , plus “K” when state changes etc.

I have tested the Tx using the on-board Sandisk photo sequencer input, signal decoded on a local DATV rx. Switching A/V Arduino unit ready for lock signal from receiver box . I have bought yet another 3d Printer, but this time it is virtually plug and play , a Flashforge Dreamer NX, and is working well, printing first time, without spending a day trying to get a decent print.

The transmitter enclosure , shown below is working . May need a few tweaks to the logic sequence once I have talked to G8DRK.

Getting on well now with receiver enclosure, got most parts fitted. I have built the A/V switch and Pi boards , loaded Ryde software, now to write and test Arduino Uno A/V selection software. Active A/V will be fed out to the Tx enclosure along with a lock signal. I am now considering just a Comtech and a Ryde Rx and limit DATV reception to 2Ms/sec or less on reception. Most people I believe ,now use a Portsdown for transmitting and DBV S2. But those using a DTX-1 can use 2Ms/sec mpeg 2.