UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Fifty Years of Colour Television in the UK

red16v · 3rd Dec 2017, 8:22 pm

Thank you. I worked on Marconi cameras in the studios - the Mk8 & Mk 9. Do you know if there was any particular technical reason the BBC wanted 4 tube rather than 3 RGB tube cameras? (As we both know the 8 & 9 were 3 tube GRB cameras rather than RGB but that of course is the subject of a different conversation). A hazy memory takes me back to thoughts of Delta L or ‘Livingstone’ correction to make YRGB cameras look like RGB cameras. I think I still have my training notes on that in the garage somewhere!! Principles of constant luminance or some such? Ouch!

3rd Dec 2017, 8:22 pm	#12
red16v Heptode Join Date: Jul 2006 Location: Winchester, Hampshire, UK. Posts: 638	Re: Fifty Years of Colour Television in the UK Thank you. I worked on Marconi cameras in the studios - the Mk8 & Mk 9. Do you know if there was any particular technical reason the BBC wanted 4 tube rather than 3 RGB tube cameras? (As we both know the 8 & 9 were 3 tube GRB cameras rather than RGB but that of course is the subject of a different conversation). A hazy memory takes me back to thoughts of Delta L or ‘Livingstone’ correction to make YRGB cameras look like RGB cameras. I think I still have my training notes on that in the garage somewhere!! Principles of constant luminance or some such? Ouch!