08-05-2022, 07:03 PM
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See yourself on Color TV!
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Join Date: Jul 2004
Location: Rancho Sahuarita
Posts: 7,745
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Replies in bold
Quote:
Originally Posted by dtvmcdonald
The images I posted were with equal bandwidth I and Q from the source,
files on a USB key played on my Sony Blu-ray player. Okay- good
I have files that are bandwidth-limited in Q and the orange artifact is much less visible. So far I can't find the screenshots of them. Okay -good
It takes at least 50 pF across L47 to resonate it at about 500 kHz ...
and results in intolerable ringing. That kills that speculation!
Both screen appearance and measured waveforms concur with what a carefully done simulation,
including the tubes and stray capacitances (in many cases actually measured while changing parts) shows. Nice. Why it would have been so bad with the specified part is a mystery then. Hard to believe they wouldn't have fixed this.
In any case, what I show is what I use at the moment, and results in the best overall pictures from
real DVDs (not Blu-rays) and the output of my digi-converter box fed into a top end
Blonder-tongue modulator, tested on channels 3, 8, and 39 (I have a channel 39 UHF strip).
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Last edited by old_tv_nut; 08-05-2022 at 07:11 PM.
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