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Old 10-12-2021, 09:05 AM
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Notimetolooz Notimetolooz is offline
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Join Date: Mar 2014
Location: Dallas, TX
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The reason I asked about the oscilloscope is that many times if there is an image on the TV screen it sort of functions as a oscilloscope itself, but this image is so scrambled that it is tough for me to figure out. A scope would let you view the vertical scan, horizontal scan and video signal separately which may clarify what is going on.
I think there are several problems being seen at the same time, so it is confusing.
Some sets used a germanium diode for the video detector. If the set has been worked on it may have been installed backwards. That might invert the sweep sync pulses and confuse both vertical and horizontal scans. However the video signal doesn't seem to be negative so maybe the detector is not the problem.
Tubes, caps and resistors are not the only things that can cause problems.
Also if it has been re-capped, there could be mistakes made.
If you have been trying to get the set to work for some time, do you have links to what went on during those earlier attempts?
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