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.
As far as I know Al can not be soldered in an open air due to instantaneous forming of Al2O3. Whatever I tried did not work - joint easily breaks after cooling even if it seems OK. The only option I see is an electrical welding - connect both pieces of aluminum to the charged cap and make a sparky contact. Do not try it with thin aluminum foil - roll a corner of it to form a thicker chunk. But I would recommend a mechanical contact - roll a tip of a foil over thick copper wire and clamp it into smg like a steel "U" pressurizing the mesh with plains as hard as possible to destroy oxide inside for better contact and prevent wire from sliding out.
Registered Member #54278
Joined: Sat Jan 17 2015, 04:42AM
Location: Amite, La.
Posts: 367
I toyed with this idea a while back, when, at first glance, I wondered if a single long flat turn (the length of the entire gun) acted as more than a single-turn loop of wire. I concluded that that there was no difference in the number-of-turns variable (N) for foil or wire.
Also, it occurred that the connections to the two wide end terminals of this coil should be such that the current flows 'into' and 'out of' the entire width of the flat ends--perhaps a large-gauge stranded wire "flattened out" and the strands soldered along the width of the copper edge ends. BUT--this may be a little tricky to implement on the 'buried' inner end layer which is somewhat inaccessible and should lie flat along the barrel !!
Has anyone thought about the inherent capacitance in this type of 'inductor'? In fact, it looks more like a (multi-layer cylindrical) capacitor.
Registered Member #11591
Joined: Wed Mar 20 2013, 08:20PM
Location: UK
Posts: 556
Signification wrote ...
I toyed with this idea a while back, when, at first glance, I wondered if a single long flat turn (the length of the entire gun) acted as more than a single-turn loop of wire. I concluded that that there was no difference in the number-of-turns variable (N) for foil or wire.
Also, it occurred that the connections to the two wide end terminals of this coil should be such that the current flows 'into' and 'out of' the entire width of the flat ends--perhaps a large-gauge stranded wire "flattened out" and the strands soldered along the width of the copper edge ends. BUT--this may be a little tricky to implement on the 'buried' inner end layer which is somewhat inaccessible and should lie flat along the barrel !!
Has anyone thought about the inherent capacitance in this type of 'inductor'? In fact, it looks more like a (multi-layer cylindrical) capacitor.
When the inductance is that low, I don't imagine that the tiny capacitance will make any difference to anything. Think of the milli-farads that you are putting into the coil. The capacitance of the coil will be in the order of pico-farads.
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.
flat copper coil...?
