Re: magnetic quenched triggered gap

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "colin heath" <colin.heath4@xxxxxxxxxxxxx>

hi all,
       IMHO, at least with higher powered systems, its more practical to just
utilize a rotary spark gap, with a possible seriesed forced air cooled
stationary gap to further commutate the heat of the spark.

David
well the reason im using a triggered gap is it will be controlled by 
electronics to fire at various times and firing rates. it will also be 
pulsed operation.
i shall build the gap in the next week or so and will go from there with 
the experiments.
i can then scope the output to air with my old scope and look at the 
quenching with different methods
cheers
colin

----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Sunday, June 05, 2005 5:04 PM
Subject: Re: magnetic quenched triggered gap


> Original poster: "Harold Weiss" <hweiss@xxxxxxxxxx>
>
> Hi Paul and Scott,
>
> Glad to hear you're at least somewhat back online Paul!!!
>
> Junk dealers don't like microwaves due to the oil filled caps and the 
> xfmrs. They are probably afraid of the dreaded PCB problem, and the xfmrs 
> are too hard to scrap properly.
>
> As for speaker magnets, the newer professional cones have up to 20 lb 
> weight NdFeB magnets.  My 1" compression drivers run with a 8" x 1" slab 
> of NdFeB, but I don't know if the steel gap pieces can be removed without 
> destroying the magnet.  Might be best to talk to a speaker manufacturer 
> about obtaining just the magnet.  I know Electro-Voice has their own 
> magnetics shop, so that might be the place to check.
>
> David E Weiss
>
>
> > 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