RE: lifter power supply - using Tesla coil (fwd)

[Steven Roys <sroys@xxxxxxxx>]

---------- Forwarded message ----------
Date: Wed, 30 Jul 2003 21:29:51 -0700
From: David Trimmell <humanb@xxxxxxxxxxxxxxxxxxx>
To: 'High Voltage list' <hvlist@xxxxxxxxxx>
Subject: RE: lifter power supply - using Tesla coil (fwd)

Hi all, I too had thought that this "lifter/anti-gravity" stuff was
bogus. So is it really a electrostatic repulsion force that is achieving
this? If not, then "how does it work"?

Charles sorry to hear about the back problems; please do not try to move
those Pigs now!

Also very happy the HV list is again active.

Regards,

David Trimmell

-----Original Message-----
From: High Voltage list [mailto:hvlist@xxxxxxxxxx]
Sent: Wednesday, July 30, 2003 1:44 PM
To: hvlist@xxxxxxxxxx
Subject: RE: lifter power supply - using Tesla coil (fwd)

Original poster: Steven Roys <sroys@xxxxxxxx>



---------- Forwarded message ----------
Date: Wed, 30 Jul 2003 13:10:33 -0400
From: Charles Brush <cfbrush@xxxxxxx>
To: High Voltage list <hvlist@xxxxxxxxxx>
Subject: RE: lifter power supply - using Tesla coil (fwd)

>
>---------- Forwarded message ----------
>Date: Tue, 29 Jul 2003 18:51:56 -0700
>From: Dave Halliday <dh@xxxxxxxxxxxxxx>
>To: 'High Voltage list' <hvlist@xxxxxxxxxx>
>Subject: RE: lifter power supply - using Tesla coil
>
>They do not need a certain polarity to work but they _do_ need direct
>current.  You can run one with the lifter at either positive or
negative
>potential but it has to be one or the other.
>
>A tesla coil has an operating frequency of around a couple hundred
>thousand cycles/second.
>
>Voltage is not enough.
>


Hi everyone!

I am really glad this list is back up, and it is at a perfect time
for me.  I just had spine surgery for a herniated disk on thursday,
so I am spending a lot of time at home with my laptop computer hooked
up to a wireless network and high speed net connection.  I saw part
of the thread on lifter supplies, got intrigued, started looking
around, and now I am really fascinated.

A question about the post above:  I read on some site that while
pulsed unfiltered DC works well for powering lifters, well filtered
DC does not.  Is this true?  I am curious since I would like to try
building a simple lifter, and I just happen to have a nice 50kV well
filtered DC supply.  Perhaps it would not be as ideal as I first
thought.  A lifter seems like a fun project since I will be
recovering for a while and  it doesn't involve moving around heavy
equipment (I have been into high powered Tesla coils for about eight
years now...tugging around pole pigs and welder ballasts is out for a
while!).

On a related topic, I saw one site where the HV wire that is normally
suspended above the skirt was enclosed in a cylinder under vacuum.
There was no ion wind, yet the device still developed thrust.  Is
this for real?  As with anything related to Tesla, this type of
technology seems to attract a certain fringe element in addition to
serious researchers.  As someone entirely new to this subject it can
be hard to tell which is which.  Any direction appreciated.

Zap!

Charles Brush
http://www.VoltNet.com