Quote:
Originally Posted by beery
Have a look at the picture on any domestic PYE set however and you will see perfect linearity.
Cheers
Andy
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Andy,
I get pretty excited by good scan linearity. Have a look at the H & V scan linearity on this 14" monochrome monitor, scroll to page 20 of this article:
http://worldphaco.com/uploads/The_19...o_monitor..pdf
They managed this with three basic things, one was the outstanding design of the deflection yoke (made by a specialist company Syntronic Instruments) photo of it on page 19, it has correction magnets built into it. Then if that was not enough, they used both current & voltage feedback around the vertical deflection amplifier to help the linearity there.
(This is the monitor that uses Tektronix's mind blowingly clever gated negative feedback black level clamp. This is one of the few sets that also uses a UJT as the vert oscillator, but I did find one other, the VDU in the IBM5155 computer uses two transistors wired as a PUT to do it, I also get enthusiastic by oddball designs)