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Michael W.

Sat Oct 28 2006, 04:36AM

Registered Member #50 Joined: Thu Feb 09 2006, 04:07AM
Location: Vernon, B.C, Canada
Posts: 324

I've seen in quite a few coil primaries that use 1" X 0.000whatever (thin) copper as the coil instead of copper tubing. What is the name of this material and what is it used for? I described it to my local home depot man and I got a

J. Aaron Holmes

Sat Oct 28 2006, 05:47AM

Registered Member #477 Joined: Tue Jun 20 2006, 11:51PM
Location: Seattle, WA
Posts: 546

"Busbar" maybe? Check eBay. There is such a thing as copper tape, but it's far too thin (from what I've seen). Another option, if you're after this sort of thing, is to squash some soft copper tubing flat. A friend of mine works in a metal shop and did this for me using a hand-operated system of rollers (not sure what it's actually called) generally used for forming strips of metal. Worked great and produced a very handsome result.

Regards,
Aaron, N7OE

Daniel Uhrenholt

Sat Oct 28 2006, 08:17AM

Registered Member #125 Joined: Fri Feb 10 2006, 01:52PM
Location: Aalborg, Denmark
Posts: 155

Hi Michael.

It is a copper strip

I got my copper from my work.

I am a educated Tool and die maker

, and work in a small factory in Denmark.

We use this copper for coil punching, it is a little hard to explain how the tools work so i give you some pictures from my final journeyman piece.

Here is some links to some of my pictures:

And all of the parts to my tool:

And a link to wikipedia:

Hope this helps.

Cheers, Daniel

Steve Ward

Sat Oct 28 2006, 04:14PM

Registered Member #146 Joined: Sun Feb 12 2006, 04:21AM
Location: Austin Tx
Posts: 1055

Home depot sells copper roof flashing. Its 6" wide, but you could cut it if you were very motivated. Otherwise, your best bet would be some place online. Ive found it on ebay from time to time. You might get lucky at a metal scrap yard or something, but i dont know much about those types of places.

There is also bronze strip that can be bought here:

Terry Blake uses it:

Seems to work fine, despite being less conductive than copper.

Finn Hammer

Sat Oct 28 2006, 05:28PM

Registered Member #205 Joined: Sat Feb 18 2006, 11:59AM
Location: SkÃ¸rping, Denmark
Posts: 741

Die Dummen DÃ¤nen wrote ...

We use this copper for coil punching, it is a little hard to explain how the tools work so i give you some pictures from my final journeyman piece.

Here is some links to some of my pictures:

Being a toolmaker myself, I must say you are a shrewd young man indeed, concealing the parts for a micro toroid in your final journeyman piece.

Bravo!

Cheers, Finn Hammer

Michael W.

Sat Oct 28 2006, 06:03PM

Registered Member #50 Joined: Thu Feb 09 2006, 04:07AM
Location: Vernon, B.C, Canada
Posts: 324

Thanks for the help, I'm probably going to just go with some copper tubing based on the fact that copper stripping seems alot harder to get, but home depot only sells the tubing in lengths of 25'. A 3 inch coil (276.75Khz tapped between 8 and 9) I might just get away with that....

HV Enthusiast

Sun Oct 29 2006, 03:09AM

Registered Member #15 Joined: Thu Feb 02 2006, 01:11PM
Location:
Posts: 3068

Actually, most of the primaries wound in this fashion use Aluminum flashing which is used in roofing. Readily available, cheap, and works extremely well.

Reaching

Sun Oct 29 2006, 01:34PM

Registered Member #76 Joined: Thu Feb 09 2006, 10:04AM
Location: Hemer, Germany
Posts: 458

for my primaries in sgtcs i only use those brass strings or brass sheets or whatever you call it. there is a huge metal factory in our city and if you have some connections you get most everything you want. i got around 50metres of those brass string dirt cheap and it works extremly well and is simple to use. normally it is used for stamps to make cable connectors etc

Ultra7

Mon Feb 25 2008, 02:29PM

Registered Member #1157 Joined: Thu Dec 06 2007, 12:11PM
Location: Houston, TX
Posts: 307

I know this thread is kind of old, but I just found 50 ft of .5" x .032" copper strip and plan on using it on my new SGTC as my primary. Looked at Terry Brooks "Huge Tesla coil"

and was wondering. . . Using Teslamap or some other program, is it possible to figure the tuning point?

I'll look into it a little more, but if you have used this and know the best way to find the tuning points, please share.

Thanx,

Hold on, I guess if I would have read it all the way, I would have seen that Terry used Wintesla. Lemme check that out before I get beat up by you guys. . .

GimpyJoe

Wed Feb 27 2008, 02:08PM

Registered Member #316 Joined: Mon Mar 13 2006, 01:30PM
Location: Marietta, GA
Posts: 212

I use brass weatherstrip from Home Depot. As I recall, it comes in rolls of about 20 feet and costs about $6 a roll. I just solder two pieces together and then make a coil using adhesive foam tape to hold turns apart (like Terry Blake's approach). It's perfect for putting a lot of turns in a tight space.

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