Millions of CRT PC monitors are being disposed of and substituted with flat LCD
monitors.

Those old boatanchor monitors contain A LOT of hard-to-find components:

- high voltage transistors and FETs (e.g. 1500V, 15 A)
- high-power fast-recovery and Shottky diodes
- high voltage electrolytics and capacitors
- high power resistors
- large ferrite beads and toroids
- inductors of all possible kinds
- beautiful heat sinks
- line filters
- integrated circuits
- etc. etc.

Typically, you will find two boards, a main board and a smaller board which is
directly connected to the CRT socket. Both are valuable.

You may get CRT monitors for a few bucks or even for free (e.g. my company is
getting rid of all CRT monitors and the boards can be easily removed before
disposal).

For quick components extraction you will need a powerful soldering iron, at
least 100W.

I wonder whether anyone would could help me understanding the rationale behind a
strange inductor I found in many of those boards. It is wound on an (apparently)
ferrite core, say one inch long and half inch diameter. The strange thing is
that the core is magnetized, so it attracts any piece of iron close to it. What
can the reason be to use a magnetized core?

73

Tony I0JX