First UK Amateur Radio Contact on 241 GHz

The first UK amateur radio contact on the 241 GHz (1.2mm) band took place on Friday 19th February 2016 at 15:00 GMT 

I was transmitting on 241.01 GHz, Chris was on a nominal 241.02 though it was 1.3 MHz low on 241.0187 GHz. 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.
— Roger G8CUB

The contact was made 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 evaluated 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. 

UK Microwave Group -