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For some reason unknown to me all the high power & some medium & low power VHF TV transmitters in Britain used vertical polarisation, (rods vertical) I don't think any other country except New Zealand did this. When I've been to USA, Mainland Europe & Russia all the VHF antennas were horizontal polarisation. At UHF all the Brit high power transmitters use horizontal polarisation & most low power are vertical, this is to try & cut down on co-channel interference...
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