What/where is a flyback transformer ?

[Old1625]

The "flyback" is a transformer that operates at 15.75KHz, and serves as horizontal output transformer to drive the appropriate windings on the yoke on the neck of the CRT. And except for the very early sets the signal is further stepped up through a large number of extra windings on the flyback to the anode of the high voltage rectifier tube. The HV for the CRT anode is taken off the filament end of the HV rectifier.

The picture you offer up is taken from an angle where the sought component is not visible. In most older sets the flyback and HV rectifier are encased in a metal housing that is "fondly" referred to in the tech trade as a "doghouse", because if you reach in there you are apt to get bit.

Nearby, and sometimes inside the doghouse you will also find the horizontal output tube and the damper tube.

In later televisions and CRT monitors the flyback is out in the open and usually at one corner of the PC board assembly. It is usually integrated with a voltage multiplier. In most cases the quickest way to locate the flyback is to locate the CRT anode lead, and trace it back.

If you look at http://flickr.com/photos/[email protected]/photostream/ of mkoser's set you will see a metal box just to the right of the CRT neck which is the infamous doghouse.