14-08-2017, 04:49 PM
(14-08-2017, 01:20 PM)ppppenguin Wrote: When you're that close to the TX and with direct line of sight a slight misalignment hardly matters.
Depends how much building work and other tall buildings there are around to affect reception ...!
We moved from the Stock Exchange Tower to a building just north of the City boundary. Broadgate and the Liverpool Station redevelopment were under way at the time and although signal level was high, the screen was filled with ghosting, with about 10 images of everything. Of course, everything changed any time a crane jib moved so we had to get our signal from Alexandra Palace - 67 watts ERP as against 1kW from Crystal palace with a CCI limited coverage of between 1 and 2 km of the transmitter!
At that range, signal levels were low enough to provide slightly grainy pictures but the Teletext quality was perfect.
I remember having to help install a dual standard TV on the southern edge of Crystal Palace Park.
The existing set top aerial produced loads of signal on Bands I & III but we needed a small Yagi in the loft pointing at an angle upwards to get a decent UHF signal!
