Oh BTW, The flybacks used in these macs. at least the earlier ones anyway, were technically only designed for 15Khz operation. for composite NTSC stuff. 22K was really pushing it. Those flybacks were used in Wyse terminals, security monitors, etc.. All 15Khz NTSC. Like the Apple II.
Yes, you really need to phase lock the flyback transformer at the very least. Use some dividers or something, PLL lock it to the sync frequency. If you dont, youll get barkhausen distortion in the raster. Which is bad. This is due to the CRT Charging/discharging at a different phase than the scanning and retrace.
Yes, you really need to phase lock the flyback transformer at the very least. Use some dividers or something, PLL lock it to the sync frequency. If you dont, youll get barkhausen distortion in the raster. Which is bad. This is due to the CRT Charging/discharging at a different phase than the scanning and retrace.