Synchrodyne wrote:It’s an interesting question.
But I don’t think one can outrule simple inertia as the reason why Sutton Coldfield et seq were vertically polarized. That is, AP had set the precedent, and there was no strong case for change as far as the main transmitters were concerned.
I've a hunch this could be the main reason why the main stations used vertical polarisation 'it works OK so if it ain't broke don't fix it!'
When I moved to Chester-le-Street in the early 60's it seemed strange not seeing any vertical H's or X's at first as they were all horizontal (Pontop Pike ch5 & Burnhope ch8). When we moved back to Nottingham about year or so later I was reacquainted with the vertical H's & X's. Also went back to my old school (Trent Bridge) but they couldn't understand my geordie accent I'd acquired, took me years to get back to Nottinghamese, lol..