UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - NV-FS200 spots on bright white scenes

Graham G3ZVT · 18th Jun 2021, 9:06 pm

I can see what I think are VideoCrypt artefacts on the L & R extremities, but other than that the picture looks pretty good to me.

What you are seeing may possibly be a consequence of some "improvements" to the VHS standard collectively called "VHS HQ". If I remember correctly one of the things it did was to take liberties with the luminance level and pre/de-emphasis and although it succeeded in making the picture subjectively sharper, it seemed to me to be a bit of a fudge that would inevitably lead to compatibility issues between machines.

I would not bet money on there being an actual fault that can be fixed.

18th Jun 2021, 9:06 pm	#17
Graham G3ZVT Dekatron Join Date: May 2010 Location: Greater Manchester, UK. Posts: 18,725	Re: NV-FS200 spots on bright white scenes I can see what I think are VideoCrypt artefacts on the L & R extremities, but other than that the picture looks pretty good to me. What you are seeing may possibly be a consequence of some "improvements" to the VHS standard collectively called "VHS HQ". If I remember correctly one of the things it did was to take liberties with the luminance level and pre/de-emphasis and although it succeeded in making the picture subjectively sharper, it seemed to me to be a bit of a fudge that would inevitably lead to compatibility issues between machines. I would not bet money on there being an actual fault that can be fixed. __________________ -- Graham. G3ZVT