05-06-2019, 07:00 PM
With the help of Frank and VHDL-help by Jeffrey, I have some preliminary results with my Hegdhog on 567 lines.
I can now switch it between 405 or 567 output and between several series of modulator frequencies.
The 567 line sets tend to drift a bit during warm-up, and the FM sound thus gets easily distorted. For this I programmed several RF frequencies with approx 30 kHz steps between them, so I can fine tune the Hedghog RF output to the momentary requirements during warm-up.
A lot of work still needs to be done regarding the precise timing of picture contents, porches and sync signals and for getting the interpolation even better than now.
The provisional set-up to enable me to test and improve everything further:
Results are quite watchable now already.
Please forgive me for the bad photo quality.
I'll try to make a photo of the direct view console set @ 567 as well.
Jac
p.s. was this called "The Daily Fable" in the UK (the series on the screen, not my post
)?
I can now switch it between 405 or 567 output and between several series of modulator frequencies.
The 567 line sets tend to drift a bit during warm-up, and the FM sound thus gets easily distorted. For this I programmed several RF frequencies with approx 30 kHz steps between them, so I can fine tune the Hedghog RF output to the momentary requirements during warm-up.
A lot of work still needs to be done regarding the precise timing of picture contents, porches and sync signals and for getting the interpolation even better than now.
The provisional set-up to enable me to test and improve everything further:
Results are quite watchable now already.
Please forgive me for the bad photo quality.
I'll try to make a photo of the direct view console set @ 567 as well.
Jac
p.s. was this called "The Daily Fable" in the UK (the series on the screen, not my post
)?
