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Old 04-10-2011, 10:54 PM
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bandersen bandersen is offline
RCA 741PCS
 
Join Date: Mar 2009
Location: Chicago, IL
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While I had the chassis out, I also replaced most of the tubes in the tuner and IF and did a full alignment. It made a big difference in the picture quality.


Here's a multi-burst test pattern. The bands on the far right are 4.2 MHZ and just barely discernible. The B&K 1077B test pattern looks pretty good too


There's just one problem. Now, I'm seeing what i believe are called 'chroma dots'. I recall reading a tip about using the green component output of a DVD player fed into an RF modulator. I tried that and it definitely did the trick.

Does anyone know any other tricks to reduce or eliminate them ?
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Last edited by bandersen; 04-10-2011 at 10:58 PM.
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