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Frances 819 & 625 line systems used positive video modulation as well as Britains, I'm presuming they used mean level AGC for their black & white sets too, I'm presuming they used gated back porch AGC for their SECAM colour sets, unless someone knows different..
Edit... Belgium also used positive modulation 819 & 625 systems till the late 1960's/early 1970's...
Last edited by Colly0410; 02-11-2020 at 05:18 PM.
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