Titel: First UK QSO on 241 GHz Bericht door: Eene de Weerd PA3CEG op Februari 19, 2016, 08:44:06 Hi folks
The first UK QSO took place today 19-02-2016 at 15:00z on the 241GHz (1.2mm) band between Roger G8CUB/P and Chris G0FDZ/P in locator square JO01EP. The distance was 30 metres and the CW signals were 559 and 589. With signal to spare both ways an attempt was made to increase the distance to over 50M but with deteriorating weather likely, a decision was taken to limit to 30M as antenna alignment was taking a very long time to achieve. A full report on today's QSO and the work that led up to it will appear in the next Scatterpoint. Photos and video will be available soon. Regards Chris G0FDZ Titel: Re:First UK QSO on 241 GHz Bericht door: Eene de Weerd PA3CEG op Februari 19, 2016, 08:54:41 I was transmitting 0n 241.01, Chris was on a nominal 241.02 though it was 1.3MHz low on 241.0187 MHz. We used separate TX & RX. All TXs were derived from Elcom synths. Chris's LO also, though I was using 16.0385 as LO (x15) into a Tektronix mixer. Chris used a 1mm dia. hole in the block on RX with cut-off around 175GHz, I used a piece of WR-03 - 173GHz cut-off
My TX used 11.4766 x3 to 34.43, then X7 to 241.01. Chris's TX used the 1301 synth. on 13.390 x3 to 40.17 x6 to 241.02. That tx was only intented as a low level source. It uses a DB6NT 240G pcb, on an old metal plate, held down with solder tags! Roger Roger G8CUB |