I  occasionally monitor the 23Cms band.  After a healthy start with signals positively booming in, on 1296.985MHz, the GB3CSB beacon just 'disappeared' one day. I'm not sure why and I can't find any information as to why it is off the air, on the usual websites, but I checked again tonight and I still can't hear a dickey bird from it. I can however copy GM6BIG's personal beacon just above 1298MHz at reasonable strength, despite the obstructed path, so I have no idea what's going on with GB3CSB on 23Cms.

My general purpose receiver is an ICOM PCR-1000 'black box' radio connected to a single Tonna yagi aerial on a pole with a rotator  on the rear of the house.  I use a short run of LMR-400 coaxial cable between aerial and radio.