Quote:
Originally Posted by pac.attack76
https://youtu.be/tBHlg-NCjQo
I put a video up on you tube showing the focus. Seems like speed of flicker depends on what's being show on screen. Sometimes it speeds up and sometimes it slowes down.
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Have you listened for it? That type of focus pulsing is often audible as well. In a dead quiet room, listen for a soft pop in time with the focus change. If you have a HV probe, you can measure the focus voltage right at the CRT pin. You will have to refocus with the meter in circuit.
John