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#1
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Why not use a battery? 9V would probably run it OK, and drain would be minimal. Give it an on/off switch.
(Hum bars are the horizontal dark shadings in the raster due to 60 or 120 Hz ripple (hum). |
#2
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I actually have a 12V battery in my pocket for that purpose. I figured I'd start there with my power supplies as it would be the "cleanest" supply.
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John |
#3
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Good idea.
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#4
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It was the power supply. Using a 12v battery eliminated the vertical bars. I have two other video problems that will need to be addressed, but I need to ascertain whether the problems come from the inverter, or are inherent to the set. I'll report back after some experimentation.
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John |
#5
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I've had precious little time to spend at my bench, but I did manage to sneak this 10 second video in on where I am. There is some crazy interference happening right now that I wanted to show you guys. I hope some one has seen this before and can point me in a direction. I am using shielded video cable (I thought that might be the issue). Any one ever seen something like this? https://youtu.be/zgcznUOokvw
P.S. I will try to get some time today to fire up the B&K 1077 and see if the issue persists when using it to inject video instead of the video circuit we made.
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John |
Audiokarma |
#6
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I'm continuing this topic in a thread about the restoration of the television in which I will be using this amplifier. Here's a link to that thread http://videokarma.org/showthread.php?t=268361
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John |
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