"William Sommerwerck" writes:

Is this on every channel? On every program?

Does it appear in every image? Moire patterns would normally appear only in
areas with a lot of fine detail.

One possible source of moire patterns is the use of a 625-line tube in a
525-line set, or vice-versa.

Huh? A 625 line tube? Perhaps you should clarify.

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