[sdiy] Tape head collage (pretty much not synth DIY, sorry)

[harrybissell]

You are fairly unlikely to get watch band burn from a 60Hz (or 50Hz)
degaussing coil.   Now a 10KHz induction heater....

H^) harry

David Cornutt wrote:

> Back in the days when Sun used to package the Phillips 25"
> monitors with the 3/160 and the like, they always shipped a
> CRT degaussing coil with them.  These monitors didn't have
> built-in degaussing coils, so they had to be manually degaussed
> about once a month.  As a junior programmer and sysadmin at
> Gould in Florida, it was my responsibility to perform this duty.
> You picked up this big plastic ring, about 18" in diameter, full
> of coils of wire, and with the cord and an in-line switch hanging
> out of one side.  The coils rattled inside the casing, and you could
> feel the whole assembly vibrate when you turned it on.
>
> You turned the thing on, with the ring held horizontally, after
> removing all tapes and floppy disks from the vicinity.  (And I
> always removed my watch first... I'm proud to say that I've been
> in engineering for about 25 years now, and unlike many of my
> contemporaries, I have yet to  acquire a watch band burn...)
> Turn it vertically, slowly approach the monitor, wave it about a bit,
> then back up slowly, turn it back horizontal, and switch it off.
> Now put it down for a few minutes because it has become
> unpleasantly warm.  One down, 10 to go.
>
> I still wonder how much I have shortened my lifespan
> expectation from doing that...