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Old 14th May 2018, 1:15 pm   #21
Graham G3ZVT
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Join Date: May 2010
Location: Greater Manchester, UK.
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Default Re: TV system differences?

Quote:
Originally Posted by Argus25 View Post
Quote:
Originally Posted by rambo1152 View Post
Another thing about 405 vs 625 in the United Kingdom, is all the 405 transmitters operated at VHF and all the 625 transmitters were on UHF, so when the 405 line system was eventually switched off in 1985, the VHF allocations were not re-engineered for 625 as you might have expected, VHF was abandoned as far as TV was concerned.
I didn't know that. So UK made 625 line TV's would not have had VHF tuners in them. All the early NZ ones did and UHF came later. Surprisingly NZ was still running VHF & UHF TV analog when I was last there some months ago. Analog TV transmissions have been gone in AU for some time.

Yes that's right.
The Irish Republic used VHF/625 but not the UK

It was quite a brave decision and a lot of local relays were required, but we ended up with a robust four channel system and ultimately managed to shoehorn a fifth, not quite so robust one in.

Also, the two incumbent networks (BBC and ITV) remained broadcasting on VHF/405 for more than a decade after they had been duplicated on UHF/625 with virtually national coverage, so when they turned 405 off in 1985, it's fair to say nobody really noticed.

Initially there was only one service rolled out on UHF/625. BBC2 was seen by the masses as a rather high brow arty-farty channel, UHF aerials were often called "BBC2 aerials"
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