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In Reply to: Whining.... posted by Tom S. on June 01, 1999 at 08:49:36:
Thanks for the information....I'm relatively new to the field of tweaking and optimizing home theater set up.....in regards to my tv - what is a flyback trannie? I'm assuming the HOT is some sort of transformer? Not sure about the shadow mask either. Are any of these parts capable of having a quieter substitute? Also my friend and I were discussing the possibility of using a dampening material such as dynamat on the back of the picture tube. Would this work?
The casing is made of plastic, so I'm not sure how much resonance it is really providing.- RT
> > what is a flyback trannie? < <A high voltage transformer that is usually the most expensive part of the TV besides the tube. Flybacks are "customized" for each television. I wouldn't mess with putting any type of dampening material directly onto the flyback.
> > I'm assuming the HOT is some sort of transformer? < <
Horizontal Output Transistor--probably the most prone to fail component in a television besides the power supply. It gets very hot and usually has biggish heatsinks attached to it. I wouldn't mess around with it.
> > Not sure about the shadow mask either. < <
That is contained inside the tv tube itself. Nothing you can do about it.
Maybe putting some dynamat or other damping material on the outside of the TV case will help but you have to have circulation for the components inside the TV (don't block the vents).
Estes made a good point about the wood cases of older TV's. I don't seem to
notice the whining of TV's in wooden entertainment centers as much as I do the TV's that are in the open.Tom S.
Plastic is a wonderful resonator. You could try putting a thick blanket around the case to see it helps. The problem of course is that the vent holes are now blocked.
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