Originally Posted by Oscarziggy
Lift conditions tonight - RTE1,Vm3 etc wiped out then broken up from Mt Leinster - signal level rapidly changing from "no signal" to "good".
RTE 2 etc not affected with "good" signal.
Wish I could get to the bottom of this .
I'm not convinced it's co channel from Carmel near Swansea as I'm on the side of a north facing hill shielded from Carmel .
It did this long before Carmel changed to C23 and C26.
I would wager your CCI is Divis in Northern Ireland. IIRC you live in West Wales and as your aerial points towards Mt Leinster it is bound to pick up sea path reflections from Divis in lift conditions and Divis is a much higher power transmitter than Carmel. I recall seeing on digitalspy in 2012 that in North Wales in higher parts along the coast between Anglesey and Liverpool Divis analogue was a regular if noisy service (CCIR Grade 3 PAL.)
The other tell is that the CCI has been present before Carmel did its 700Mhz switchover: Divis E23 and E26 has been operating for years as a DTT service. It is received easily on the Isle of Man and stayed Group A for the main muxes at the 700Mhz change.