Re: rectifying nst's

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

Original poster: "bob golding by way of Terry Fritz <twftesla-at-uswest-dot-net>" <yubba-at-clara-dot-net>

hi all,
This is why I want to experiment with a rotary rectifier first _before_ I
kill my
strings of 1N5408's. I will let Terry find out how many you need ;-)). MMD? I
have 500 of them so I was thinking of 40 per string as well. There is a
description of a rotary rectifier on the "amateur Scientist" CD under "making
your own holograms"  Feb. 1967 for those who might be interested. Another
advantage I have thought with a rotary rectifier is that if one used brushes to
take off the power rather than just letting it spark you would have a
direct path
back to ground though the transformer centre tap. to discharge your smoothing
caps as there would not be the blocking effect from using  a bridge rectifier.
Someone correct me if If I have got this bit wrong. Still trying to find a
small
motor to modify. The shaded pole mods didn't work . It  keeps drifting  in and
out of sync. Plenty of 4 pole motors but small 2 pole ones seem a bit more
difficult to find.

cheers
bob golding

Tesla list wrote:

> Original poster: "Terry Fritz" <twftesla-at-uswest-dot-net>
>
> Hi Brian,
>
> Thanks for the tip!  I got 200 of them at DigiKey's bargain quantity price
> so I will go to 30 per bridge leg as you recommend (maybe 40 ;-))!  Note
> that for a bridge rectifier configuration that has say 40 diodes per
> string, yields 40kV of stand off voltage not 80.
>
> Cheers,
>
>         Terry
>
> At 08:29 AM 4/3/2001 -0700, you wrote:
> >Terry/Marc,
> >
> >That is exactly what I was working on last year (20-1N5408's per string).
> >With the failures I experienced I'd up the count to 30 (25 as you proposed
> >may be just enough)...
> >
> >See the following URL for details of my DC exploits
> >http://fp2.hughes-dot-net/brianb/dc.htm
> >
> >Regards,
> >Brian B.
> >
> > -----Original Message-----
> >From:  Tesla list [mailto:tesla-at-pupman-dot-com]
> >Sent:  Monday, April 02, 2001 8:39 PM
> >To:    tesla-at-pupman-dot-com
> >Subject:       Re: rectifying nst's
> >
> >Original poster: "Terry Fritz" <twftesla-at-uswest-dot-net>
> >
> >Hi Marc,
> >
> >Is is totally untested so beware!!  But my idea for doing this with my
> >SSgap system is at:
> >
> >http://hot-streamer-dot-com/TeslaCoils/MyCoils/SolidStateCoil/SSgap2001-4-1/High
> >VoltageRectifier.jpg
> >
> >That is supposed to be all one line.  It is just long strings of plain 1
> >amp 1000PIV diodes strung together in a bridge configuration.
> >
> >Cheers,
> >
> >       Terry
> >
> >
> >At 10:41 PM 4/2/2001 -0400, you wrote:
> >>all,
> >>is there any way to rectify an nst to dc?
> >>i wanted to run dc through my triggered spark gap to see if it would
> >>still fire at 120hz, then my plan was to build a variable frequency
> >>trigger source to drive the ford coil. i have a variable frequency drive
> >>that i should be able to drive up to 1200hz.
> >>i only have one mot at the moment, but i can get another and i have two
> >>small 1.5kva 2400v pt's, but it would take some limiting to keep these
> >>in line. i do have a double stack 20 amp powerstats i could use?
> >>i would appreciate any suggestions as to the best way to get dc for this
> >>variable trigger gapped coil project. the ford coil triggered gap is
> >>working great at 120hz sync. so i thought i would move forward from
> >>here.
> >>thanks in advance,
> >>marc m.
> >>
> >