How to Stop High-Pitched Humming from 70s TV's?

[zeno]

Its caused by a mechanical vibration.
First probe around the HV area to see if your noise
goes away. You can also make a stethoscope out of an
old paper towel tube or the like to pin point it.
If the flyback has nuts on it usually a very slight tightening
will fix it. Dont tighten much or you will crack the core.
Also check it mechanically such as screws holding it to
the PCB or frame. If its between the PCB & FBT wedge it.
If you can push & make it go away you can also wedge it often.
Same deal with yokes but its almost always the FBT doing it on
a B&W. Once in a while it will be a hefty coil in the yoke ckt
vibrating.

On a color set you can add the pin ckt & switching power supplys
to the list of suspects..........

In any case all sets do it some worse than others. I cant hear it
unless its really bad. Thats what happens when you put a box
of rounds through a .44 magnum without ear plugs

73 Zeno

[Jon A.]

Originally Posted by zeno

In any case all sets do it some worse than others. I cant hear it
unless its really bad. Thats what happens when you put a box
of rounds through a .44 magnum without ear plugs

73 Zeno

Some punks decided to go ahead and make your day huh?

[Gunslinger]

Try placing wooden tooth picks at the transformer cores, applying RTV on ferrite beads on component legs. Repack Heat sinks with proper grease compound.

[idiotbox]

Im in my 20s. You guys are talking over my head as I have no experience in electronics. I think I'll have to take them to someone who knows what they're doing.

[NoPegs]

Originally Posted by idiotbox

Im in my 20s. You guys are talking over my head as I have no experience in electronics. I think I'll have to take them to someone who knows what they're doing.

Youth is no excuse!

I turned 29 this year(For the first time) and you're making me feel old already.


However, you do show good judgement in knowing when a task is beyond your capability and should seek assistance. Maybe society has a chance after all...


We're all more or less used to two kinds of new member questions: Either someone inherited some vintage gear and wants advice on if it has value or if anyone here would give it a good home, or they're someone who does electronics, and seeks advice on their issue(s). I took you for the second type, as did a few others it seems.