Welcome
Username or Email:

Password:


Missing Code




[ ]
[ ]
Online
  • Guests: 26
  • Members: 0
  • Newest Member: omjtest
  • Most ever online: 396
    Guests: 396, Members: 0 on 12 Jan : 12:51
Members Birthdays:
No birthdays today

Next birthdays
07/09 Avi (41)
07/09 Jannick Hagen (15)
07/10 Sparcz (69)
Contact
If you need assistance, please send an email to forum at 4hv dot org. To ensure your email is not marked as spam, please include the phrase "4hv help" in the subject line. You can also find assistance via IRC, at irc.shadowworld.net, room #hvcomm.
Support 4hv.org!
Donate:
4hv.org is hosted on a dedicated server. Unfortunately, this server costs and we rely on the help of site members to keep 4hv.org running. Please consider donating. We will place your name on the thanks list and you'll be helping to keep 4hv.org alive and free for everyone. Members whose names appear in red bold have donated recently. Green bold denotes those who have recently donated to keep the server carbon neutral.


Special Thanks To:
  • Aaron Holmes
  • Aaron Wheeler
  • Adam Horden
  • Alan Scrimgeour
  • Andre
  • Andrew Haynes
  • Anonymous000
  • asabase
  • Austin Weil
  • barney
  • Barry
  • Bert Hickman
  • Bill Kukowski
  • Blitzorn
  • Brandon Paradelas
  • Bruce Bowling
  • BubeeMike
  • Byong Park
  • Cesiumsponge
  • Chris F.
  • Chris Hooper
  • Corey Worthington
  • Derek Woodroffe
  • Dalus
  • Dan Strother
  • Daniel Davis
  • Daniel Uhrenholt
  • datasheetarchive
  • Dave Billington
  • Dave Marshall
  • David F.
  • Dennis Rogers
  • drelectrix
  • Dr. John Gudenas
  • Dr. Spark
  • E.TexasTesla
  • eastvoltresearch
  • Eirik Taylor
  • Erik Dyakov
  • Erlend^SE
  • Finn Hammer
  • Firebug24k
  • GalliumMan
  • Gary Peterson
  • George Slade
  • GhostNull
  • Gordon Mcknight
  • Graham Armitage
  • Grant
  • GreySoul
  • Henry H
  • IamSmooth
  • In memory of Leo Powning
  • Jacob Cash
  • James Howells
  • James Pawson
  • Jeff Greenfield
  • Jeff Thomas
  • Jesse Frost
  • Jim Mitchell
  • jlr134
  • Joe Mastroianni
  • John Forcina
  • John Oberg
  • John Willcutt
  • Jon Newcomb
  • klugesmith
  • Leslie Wright
  • Lutz Hoffman
  • Mads Barnkob
  • Martin King
  • Mats Karlsson
  • Matt Gibson
  • Matthew Guidry
  • mbd
  • Michael D'Angelo
  • Mikkel
  • mileswaldron
  • mister_rf
  • Neil Foster
  • Nick de Smith
  • Nick Soroka
  • nicklenorp
  • Nik
  • Norman Stanley
  • Patrick Coleman
  • Paul Brodie
  • Paul Jordan
  • Paul Montgomery
  • Ped
  • Peter Krogen
  • Peter Terren
  • PhilGood
  • Richard Feldman
  • Robert Bush
  • Royce Bailey
  • Scott Fusare
  • Scott Newman
  • smiffy
  • Stella
  • Steven Busic
  • Steve Conner
  • Steve Jones
  • Steve Ward
  • Sulaiman
  • Thomas Coyle
  • Thomas A. Wallace
  • Thomas W
  • Timo
  • Torch
  • Ulf Jonsson
  • vasil
  • Vaxian
  • vladi mazzilli
  • wastehl
  • Weston
  • William Kim
  • William N.
  • William Stehl
  • Wesley Venis
The aforementioned have contributed financially to the continuing triumph of 4hv.org. They are deserving of my most heartfelt thanks.
Forums
4hv.org :: Forums :: High Voltage
« Previous topic | Next topic »   

High Voltage Questions

1 2 
Move Thread LAN_403
keantoken
Wed Nov 26 2008, 08:33AM Print
keantoken Registered Member #1442 Joined: Mon Apr 14 2008, 04:19AM
Location:
Posts: 13
Hello. I am new here and don't have much experience aside from what my plasma globe has been able to offer, so I would like to ask some questions:

1: If I were to take the globe off of my plasma globe, should the FBT be useful for Kirlian photography?

2: Tesla has suggested Linseed oil in his experiments, although this is undoubtedly outdated. In the link below it is stated that linseed oil has a dielectric breakdown of 300V per mil. Is this good? Boiled linseed oil will eventually dry and become hard, which seems to be useful to me. I have searched these forums and have not found a whisper of linseed oil... The data is on page 318.

Link2,M1

Thank you for answering my questions.

- keantoken
Back to top
Proud Mary
Wed Nov 26 2008, 09:15AM
Proud Mary Registered Member #543 Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
In the last few years, and for environmental reasons, there has been a big move back to the use of vegetable oils in high-voltage power transmission and industrial transformers.

See for example:

Link2

Ordinary vegetable oils as can be bought for cooking have been used by some 4HV members with good effect.

Others complain that the vegetable oils are smelly when left to oxidize in open air, and disagreeable to work with and clean up after when compared with mineral oil, but these objections have nothing to do with their dielectric properties.
Back to top
keantoken
Wed Nov 26 2008, 10:12AM
keantoken Registered Member #1442 Joined: Mon Apr 14 2008, 04:19AM
Location:
Posts: 13
Thanks Harry. Unfortunately I am not worried about the environment right now. After I have more experience I may decide to use more eco-friendly materials. In any case linseed oil shouldn't be any less natural than vegetable or sunflower oil, although I have not researched this.

If I am to believe the page below, boiled linseed oil is superior to mineral oil in that it has higher dielectric strength and it can also be applied to say a secondary on a TC and let dry.

Link2

At any rate I will wait for daytime so there are more replies.

- keantoken
Back to top
Proud Mary
Wed Nov 26 2008, 11:59AM
Proud Mary Registered Member #543 Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
If you are interested in using historic materials, my guess is that Tesla would have painted his free-standing coils* with shellac, which was the most popular varnish for induction coils and so on in his time.

Nowadays people tend to use conformal coating, synthetic varnishes, and so on.

Linseed oil is sometimes used as component in mixed vegetable dielectric oil compositions.

"The dielectric fluid composition... wherein the vegetable oil is selected from a group comprising castor oil, coconut oil, corn oil, cottonseed oil, linseed oil, olive oil, palm oil, peanut oil, grapeseed oil, canola oil, safflower oil, sunflower oil, and soybean oil, high oleic variants thereof, and mixtures thereof ."
(Source: (WO/2007/041785) LOW VISCOSITY VEGETABLE OIL-BASED DIELECTRIC FLUIDS)

I'm not quite sure why you want to use dried (polymerised) linseed rather than a modern synthetic varnish on your coil, which would give superior performance with less effort, so perhaps we are talking at cross-purposes here! cheesey

*I seem to recall that some of Tesla's horizontal designs were completely immersed in de-gassed linsed oil, and/or wax.
Back to top
Steve Conner
Wed Nov 26 2008, 12:23PM
Steve Conner Registered Member #30 Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
I have Tesla's "Experiments With Alternate Currents..." and he often mentions using boiled linseed oil in it.
Back to top
Proud Mary
Wed Nov 26 2008, 12:41PM
Proud Mary Registered Member #543 Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
keantoken wrote ...
linseed oil shouldn't be any less natural than vegetable or sunflower oil, although I have not researched this.

Linseed oil is, of course, a vegetable oil. I would guess that it's popularity as a liquid dielectric in Tesla's time was largely economic, a by-product of the flax industry.

Do bear in mind that modern consumer products labelled "boiled linseed oil" are not simply linseed oil that has been boiled to partially polymerize it, but usually have added metallic drying agents (organo-metallic compounds) to accelerate drying. What effect this has on the dielectric strength and electrical stability of the product I do not know.
Back to top
keantoken
Wed Nov 26 2008, 04:58PM
keantoken Registered Member #1442 Joined: Mon Apr 14 2008, 04:19AM
Location:
Posts: 13
Thank you for your replies. I think I have enough information about linseed oil and Kirlian photography, so on to my next question:

3: What are the changes in streamer appearance and behavior as one increases the frequency?

- keantoken
Back to top
Turkey9
Sat Nov 29 2008, 05:53AM
Turkey9 Registered Member #1451 Joined: Wed Apr 23 2008, 03:48AM
Location: Boulder, Co
Posts: 661
Experiment and find out cheesey!
Back to top
keantoken
Sat Nov 29 2008, 08:16AM
keantoken Registered Member #1442 Joined: Mon Apr 14 2008, 04:19AM
Location:
Posts: 13
Ah. I will do this then!

- keantken
Back to top
LutzH
Thu Dec 04 2008, 07:55PM
LutzH Registered Member #1721 Joined: Sat Sept 27 2008, 08:44PM
Location:
Posts: 136
Just for Trivia:

Maxwell uses highly refined Castor Oil in its high energy capacitors, so Castor Oil may be a good bet. If in this case you had a catastrophic accident, you may get the "trots" if you assimilated to much of it :)
Back to top
1 2 

Moderator(s): Chris Russell, Noelle, Alex, Tesladownunder, Dave Marshall, Dave Billington, Bjørn, Steve Conner, Wolfram, Kizmo, Mads Barnkob

Go to:

Powered by e107 Forum System
 
Legal Information
This site is powered by e107, which is released under the GNU GPL License. All work on this site, except where otherwise noted, is licensed under a Creative Commons Attribution-ShareAlike 2.5 License. By submitting any information to this site, you agree that anything submitted will be so licensed. Please read our Disclaimer and Policies page for information on your rights and responsibilities regarding this site.