Re: Sync motor

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Sean Taylor by way of Terry Fritz <twftesla-at-qwest-dot-net>" <taylorss-at-rose-hulman.edu>

Where do all of you get your tungsten electrodes for spark gaps? Thanks.

----------------------
Sean Taylor
The Geek Group
G-2 #1204
Because the geek shall inherit the Earth! (c)
www.thegeekgroup-dot-org



----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Saturday, February 16, 2002 12:47 PM
Subject: RE: Sync motor


> Original poster: "David Kyle by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<dave-at-kyleusa-dot-com>
>
> I picked up my Oriental Motor http://www.omusa-dot-com/index.html 25Watt,
> 1/30HP 1800RPM synchronous motor surplus from C&H Sales in Los Angeles
> http://www.aaaim-dot-com/CandH/index.htm. I paid about $35 dollars and they
> had quite a few in stock last summer. No modifications were required and
> it seems to have more than adequate power to keep an 8" x 1/4" G3 Glass
> Cloth/Phenolic disk with 3/16 inch Lanthanated Tungsten electrodes
> spinning smoothly at 1800 RPM. It works with John Freau's very cool SRSG
> phase control circuit although it does seem to vibrate a bit at the
> extreme edge of the phase adjustment
> http://members.aol-dot-com/_ht_a/futuret/images/phshift4.jpg.
>
> You can see my SRSG here: http://home.austin.rr-dot-com/dkyle/tesla.htm
>
> =========================================
> Dave Kyle
> Austin, TX USA
> Email: dave-at-kyleusa-dot-com
>
>
> -----Original Message-----
> From: Tesla list [mailto:tesla-at-pupman-dot-com]
> Sent: Friday, February 15, 2002 1:19 PM
> To: tesla-at-pupman-dot-com
> Subject: Re: Sync motor
>
> Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <Parpp807-at-aol-dot-com>
>
> In a message dated 2/14/02 10:22:00 PM Central Standard Time,
> tesla-at-pupman-dot-com writes:
>
> > Original poster: "Andy Cobaugh by way of Terry Fritz
> <twftesla-at-qwest-dot-net>" <
> > kb3ewy-at-rcn-dot-com>
> >
> >  Where can I find a synchronous motor for a SRSG and how much should I
>
> expect
> > to
> >  pay for one?  I don't want to make another static spark gap.
> >
> >  Andy, KB3EWY
>
> Andy,
> I am making a SRSG right now. I cannot say my search for a salient pole-
> synchronous motor was exhaustive but I checked with Grainger,
> McMaster-Carr,
> and a local motor repair shop. The guy in the motor shop had lots of
> catalogs
> but
> we never found anything. I faxed to McMaster. They are always very
> helpful
> and called back to say that they just have no source for what I am
> looking
> for.
>
> I have several motors. I picked a junk motor (1725 RPM) for practice and
>
> filed 4 flats
> on the armature. The results are not perfect but it works and
> synchronizes
> under the
> florescent lamps. So right now I am filing the flats on a near-new 1/4
> HP,
> 1725 RPM
> Sears, Roebuck motor. It's not that difficult. Get a good flat mill
> file. You
> could buy a rt-angle grinder for what I
> think a suitable motor will cost. My guess is that buying the motor does
> not
> present
> the most favorable cost-benefit picture.
>
> Hope this helps.
> Cheers,
>
> Ralph Zekelman
>