48 line 64 line Conversion
Posted: Tue Jun 13, 2017 6:27 pm
This will be a good place to start for the Conversion work .
I had forgotten i did try to make the sawtooth oscillators variable i tried it on a early circuit idea SSTV by changing R704 and R724 to trimmers and the capacitors C702 and C721
well i didn't draw up the changes so from memory only any case i am not sure the sawtooth oscillators are the problem
I have not had time to work more on this just think about it
Results were monitor at 32 line unchanged the sawtooth line frequency synced from a 64 line video ..sawtooth 800 hz and the frame drops back to 6 hz results 2 images slow rolling .
i was thinking at first it was a sawtooth circuit frequency change needed but since we are deriving the framing from the line i am starting to think its the timing of the monos that is the problem .
Do you think the same Steve ?
I had forgotten i did try to make the sawtooth oscillators variable i tried it on a early circuit idea SSTV by changing R704 and R724 to trimmers and the capacitors C702 and C721
well i didn't draw up the changes so from memory only any case i am not sure the sawtooth oscillators are the problem
I have not had time to work more on this just think about it
Results were monitor at 32 line unchanged the sawtooth line frequency synced from a 64 line video ..sawtooth 800 hz and the frame drops back to 6 hz results 2 images slow rolling .
i was thinking at first it was a sawtooth circuit frequency change needed but since we are deriving the framing from the line i am starting to think its the timing of the monos that is the problem .
Do you think the same Steve ?