Just to say I have scrolled back through the comments and found another post with the same problem.
has strong strength but poor , that is what I found previously as the TV would autotune to it every time, meaning I had to manually sort it.
That post thinks from the at was to blame.

Regards

link to this comment

G's Freeview map G's terrain plot G's frequency data G's Freeview Detailed Coverage

Chesterfield (Derbyshire, England) Full Freeview transmitter
Wednesday 16 February 2022 2:12PM
Chesterfield

Many Thanks Chris.SE for your detailed reply.
My is dry and well ventilated, so corrosion is not a problem, however the in there is connected to a 3-way splitter/ and it does point directly at a plastic cold water tank. I wonder if this is affecting the polarisation? Could be boosted too strong?

I have been playing around with a great little phone app "UK Aerial Alignment" I would say that my aerial (Vertical) is pointing best towards Emley (Horizontal) where the strongest is. However (Vertical) is only slightly further North.

Examining a different TV (kitchen) it seems that one is picking up different signals again (from the same aerial) still no C31. A mixture of Emley & Chesterfield frequencies. I was tempted to go up and try the aerial Horizontally, but as I have great signal strength and on all available (except COM7) it would be better not upset things.

I have found this interesting, the fact I am missing C31 is just strange, but not causing me any problem as I now realise that the TV's will pick up the best signal from anywhere. I now suspect C31 could be too strong with my setup. At least I now have a much better understanding of my TV signals.

Very Many Thanks again for the great on here.

link to this comment

G's Freeview map G's terrain plot G's frequency data G's Freeview Detailed Coverage

Page 2