Nasty interference
I never really noticed it until now but it seems that there is something seriously wrong in my A/V system.
While watching a dvd I noticed that different tones in the sound (or just plain loudness) caused the tv to display light horizontal lines and lose stability at the top and bottom of the screen. Combining loud noises (a teletype working away) with a bright picture (a sheet of paper coming out of the teletype) and the system completely loses hold on the picture.
This is where it gets interesting.
If I switch on my Sony Color video printer (tv s-video input connects through here and is bridged) while the picture is out of sync, the picture suddenly snaps and holds.
The other problem is if I turn the volume too high.
After passing 25% on volume on the stereo receiver, I get a chirp and the circuit protect activates on the amp. Even if only the amp is on. In two cases the circuit protect failed to activate and the amp restarted hard and came back with it's entire internal memory (station presets, sound preferences etc.) blank indicating it got zapped! If I very carefully turn the volume up, just before the system kicks out there is a pitched tone. A very slight change in volume makes a large difference on the squeal and it almost sounds like feedback.
The only thing I have that is not really shielded is a Rotel selector switch I modded to also have selective video. While that was done two years ago, I don't see why it is doing it now.
Anyone know what is going on?
While watching a dvd I noticed that different tones in the sound (or just plain loudness) caused the tv to display light horizontal lines and lose stability at the top and bottom of the screen. Combining loud noises (a teletype working away) with a bright picture (a sheet of paper coming out of the teletype) and the system completely loses hold on the picture.
This is where it gets interesting.
If I switch on my Sony Color video printer (tv s-video input connects through here and is bridged) while the picture is out of sync, the picture suddenly snaps and holds.
The other problem is if I turn the volume too high.
After passing 25% on volume on the stereo receiver, I get a chirp and the circuit protect activates on the amp. Even if only the amp is on. In two cases the circuit protect failed to activate and the amp restarted hard and came back with it's entire internal memory (station presets, sound preferences etc.) blank indicating it got zapped! If I very carefully turn the volume up, just before the system kicks out there is a pitched tone. A very slight change in volume makes a large difference on the squeal and it almost sounds like feedback.
The only thing I have that is not really shielded is a Rotel selector switch I modded to also have selective video. While that was done two years ago, I don't see why it is doing it now.
Anyone know what is going on?
<----Computer says I need more beer.
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