UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

ppppenguin · 1st Jun 2006, 9:40 pm

Jim

Can you print out the schematics and bring them on Sunday? Might also be worth printing some simple explanatory stuff to put on the display. Something along the lines of "PC running Linux and mythTV" , "RGB+sync combiner" , "405 line output"

The AD828 looks like a perfectly sensible choice of video opamp, especially if you have some in your junk box. It's voltage feedback (as agaisnt current feedback) so you don't have to choose the feedback resistor to set the bandwidth. I applaud the use of ve and -ve supplies though it isn't absolutely necessary for this sort of design. I wonder if you could sneak a bit of +/-12V out of the PC to avoid a wall wart.

1st Jun 2006, 9:40 pm	#82
ppppenguin Retired Dormant Member Join Date: Dec 2003 Location: North London, UK. Posts: 6,168	Re: PC as a standard convertor Jim Can you print out the schematics and bring them on Sunday? Might also be worth printing some simple explanatory stuff to put on the display. Something along the lines of "PC running Linux and mythTV" , "RGB+sync combiner" , "405 line output" The AD828 looks like a perfectly sensible choice of video opamp, especially if you have some in your junk box. It's voltage feedback (as agaisnt current feedback) so you don't have to choose the feedback resistor to set the bandwidth. I applaud the use of ve and -ve supplies though it isn't absolutely necessary for this sort of design. I wonder if you could sneak a bit of +/-12V out of the PC to avoid a wall wart.