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kan_turk · 21st Jul 2019, 1:22 pm

The normal progression worldwide when television was introduced was to start with VHF (initially band 1 then band 3 as additional services were required) and only utilising UHF when VHF spectrum was fully occupied - no change of line standard took place so 525 line territories remained on 525 lines for VHF THEN UHF , similarly with 625 line territories - only exceptions were Britain and France where legacy systems occupied the VHF spectrum (405 line in Britain, 819 line in France) - this scenario led to a number of misconceptions such as ‘UHF is superior to VHF’ - it is not, quite the reverse in fact and ‘VHF = 405 line, UHF = 625 line’ - not so, any line standard can be used with any frequency band - there is absolutely no correlation between the two

Hope this clarifies

Rgds to all
John

21st Jul 2019, 1:22 pm	#197
kan_turk Hexode Join Date: Mar 2014 Location: Dublin, Ireland Posts: 398	Re: Hedghog standards converter The normal progression worldwide when television was introduced was to start with VHF (initially band 1 then band 3 as additional services were required) and only utilising UHF when VHF spectrum was fully occupied - no change of line standard took place so 525 line territories remained on 525 lines for VHF THEN UHF , similarly with 625 line territories - only exceptions were Britain and France where legacy systems occupied the VHF spectrum (405 line in Britain, 819 line in France) - this scenario led to a number of misconceptions such as ‘UHF is superior to VHF’ - it is not, quite the reverse in fact and ‘VHF = 405 line, UHF = 625 line’ - not so, any line standard can be used with any frequency band - there is absolutely no correlation between the two Hope this clarifies Rgds to all John