RE: magnetic quenched triggered gap

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Dave Halliday" <dh@xxxxxxxxxxxxxx>

I looked into a Mag gap ten years ago when I was last into coiling.
(Getting back into it)

The only hassle with Neodymium is that it has a very low Curie
Temperature.
If the magnet gets heated above this, no more magnet.

For Neodymium-Iron-Boron magnets, it's around 320 Centigrade.
You will need to overdo your heat sinks and provide forced-air cooling
but it should work fine. Just watch your temperature.


Two good vendors are:

The Gauss Boys
http://www.gaussboys.com/

And

Wondermagnet
http://www.wondermagnet.com/

I prefer Wondermagnet -- have dealt with them for other projects and
they are great people to deal with.
Lots of practical info on their site too.

They also have an alt-energy site with lots of off-grid DIY information.
http://www.otherpower.com/


Dave


> -----Original Message-----
> From: Tesla list [mailto:tesla@xxxxxxxxxx]
> Sent: Saturday, June 04, 2005 7:05 PM
> To: tesla@xxxxxxxxxx
> Subject: Re: magnetic quenched triggered gap
>
>
> Original poster: BunnyKiller <bunikllr@xxxxxxx>
>
> if you want to use magnets... I would look for Hard Drive
> magnets or the
> Neodynium ( spelling??)  types ( I think they are the same)  speaker
> magnets are designed to keep the flux in the center of the
> core ( donut
> hole) of the magnet...   they are pretty weak alse where
> other than the
> inside of the hole area....   check Ebay for neodynium
> magnets...   lots of
> sellers offering them ...  I bought 2   2.5"X1.5" rounds and
> talk about
> powerful!!!!    suck the car keys from your pocket at 12"
> I placed one
> on the counter top and it pulled all the steel type kitchen
> utensiles from
> the drawer 4" under the counter top    at 3-5 feet, it will
> screw up the TV
> or computer monitor in a hurry...   im sure with this type of
> flux power it
> should do something for flux quenching....
>
> Scot D
>
>
>
> Tesla list wrote:
>
> >Original poster: "colin heath" <colin.heath4@xxxxxxxxxxxxx>
> >
> >hi all,
> >        im looking to build a triggered gap and was
> wondering about the
> > effectiveness of the magnetic quenched gaps?
> >what sort of magnets do we need to achieve a good quech in
> say a 2KW system?
> >can normal speaker magnets be used or are we talking about
> high powered
> >rare earth types?
> >cheers
> >colin heath
> >
> >
>
>
>
>
>
>