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<blockquote data-quote="Fisty McB" data-source="post: 1125192" data-attributes="member: 389824"><p>In the UK at least the +/-9 channel rule was largely thrown out the window when Channel 5's analogue network was being developed, as numerous main and higher powered relay sites broke this rule. As examples Black Hill in Scotland &amp; Preseli in Wales both transmitted on E37 + E46, while in the English Midlands Lichfield broadcast on E37 with nearby Sutton Coldfield transmitting on E46. The Wrekin, Bilsdale &amp; Darvel also had E26 + E35 transmissions from common sites. I'm sure there's others too, I think the Peterhead relay in Scotland had E59 + E68. The only +/-5 channel example I could find was Huntshaw Cross which had Channel 5 on E67 with another transmission on E62 (though C5's TX ERP was limited to 2kW compared to 100kW for the main four). Again from memory I remember reading that the +/-5 channel difference was more important to avoid in order to avoid problems with the intermediate frequencies used by TV tuners the same way that the 10.7 MHz rule exists for FM radio.</p></blockquote><p></p>

[QUOTE="Fisty McB, post: 1125192, member: 389824"] In the UK at least the +/-9 channel rule was largely thrown out the window when Channel 5's analogue network was being developed, as numerous main and higher powered relay sites broke this rule. As examples Black Hill in Scotland & Preseli in Wales both transmitted on E37 + E46, while in the English Midlands Lichfield broadcast on E37 with nearby Sutton Coldfield transmitting on E46. The Wrekin, Bilsdale & Darvel also had E26 + E35 transmissions from common sites. I'm sure there's others too, I think the Peterhead relay in Scotland had E59 + E68. The only +/-5 channel example I could find was Huntshaw Cross which had Channel 5 on E67 with another transmission on E62 (though C5's TX ERP was limited to 2kW compared to 100kW for the main four). Again from memory I remember reading that the +/-5 channel difference was more important to avoid in order to avoid problems with the intermediate frequencies used by TV tuners the same way that the 10.7 MHz rule exists for FM radio. [/QUOTE]

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