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Author Topic: HV wire  (Read 313 times)
N2JXN
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Posts: 189




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« on: December 24, 2007, 01:48:38 PM »

Does anybody know of a source of 1000volt 14,16,or 18 awg wire.

Hope everybody has a great and healthy holiday
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AC5UP
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Posts: 3870




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« Reply #1 on: December 24, 2007, 02:21:04 PM »

Check locally for any outfit that carries aviation surplus parts, does aircraft repair or deals in avionics. American Airlines had a surplus outlet in Tulsa many years ago and something like a wing wiring harness is about as good as it gets in terms of wire quality. Silver Teflon wrapped in nylon braid covered with a clear plastic sheath and designed for conductivity, mechanical strength, abrasion resistance. Solders easily, too.

No voltage rating as each wire in the bundle was marked only with a reference code per the blueprints -but- Teflon has excellent dielectric properties and 1000v should be no problem for the 12 or 14ga stuff I've seen.

Sometimes you can turn on the OM charm and score a short reel for next to nothing. Wink
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N3JBH
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« Reply #2 on: December 24, 2007, 02:25:55 PM »

mcmaster carr and mouser electronics.
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AC5E
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Posts: 3585




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« Reply #3 on: December 24, 2007, 03:28:57 PM »

Most silicone "test prod lead," the stuff that comes with Simpson 260's and the like, will hold 5 KV short time and 1 KV forever. Most professional electronics supply houses have red, black, and white, and some also stock yellow.

Look in the yellow pages for "electronic supply," and ignore Radio Shack. If you cannot find one, ask your local TV tech where he gets parts.


73  Pete Allen  AC5E
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VA7CPC
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Posts: 2386




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« Reply #4 on: December 24, 2007, 03:49:55 PM »

Another alternative -- GTO-15 wire, which is used for neon signs.  It's rated for 15 KV -- thick polyethylene insulation, with a vinyl outer sheath for protection.

It's available at marine-electronics suppliers, but probably cheaper at the local neon-sign shop.

   Charles
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WB2WIK
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Posts: 20595




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« Reply #5 on: December 24, 2007, 04:33:47 PM »

Most PTFE insulated wire is good for several KV and it's readily available in many gauges -- surplus, it's even cheap!

Not as flexible as vinyl insulation, but for a readily available, inexpensive source of stranded wire that is insulated to well beyond 1kVrms, PTFE wire is hard to beat.  I buy it surplus on 1000' spools for about $30 a spool at the local electronic surplus outlet (Apex Electronics, Sun Valley, CA).

WB2WIK/6
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K4RTS
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Posts: 6




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« Reply #6 on: December 25, 2007, 05:50:30 AM »

Depending on how long of a wire you need. Try
auto ignition wire. It can be purchased on rolls
for custom made wire sets. Some auto parts stores
carry it, though isially not the chain store type.
Its insulation is probably good beyond 20 kv.
Of course only the non-resistor type is worth using.
Solid wire type usually is several strands on copper
or copper coated stainless steel.

Richard
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K9YLI
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Posts: 863




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« Reply #7 on: December 25, 2007, 07:20:41 AM »

as above,  try  a farm supply store/tractor dealer.
tractors don't usually  use carbon  ignition wires.
At least not the older  classic tractors.
they used real wire  wires.

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AC5UP
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Posts: 3870




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« Reply #8 on: December 25, 2007, 07:06:31 PM »

FYI: Did some snoopin' on the web regarding the dielectric properties of PTFE / Teflon and found an outfit that makes a fiberglass mesh insulating tape impregnated with PTFE top, bottom and middle.

http://www.cshyde.com/dielectricfabspec.htm

The tape comes in two flavors: Five mils (.005") @ 3.9 kV and 10 mils (.010") @ 5.2 kV.

A typical trash bag is around 1 mil so fold one five or ten times over on itself for an idea of how thick that is.

I know PTFE is a good insulator, but never imagined it's *that* good. And, yeah, the fiberglass part is no slouch either...

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KE3WD
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« Reply #9 on: December 25, 2007, 09:33:02 PM »

If you only need a short length, such as for a tube cap or the like, don't overlook the old CRT driven color TV sets and monitors, where you will find a nice piece at the end of every flyback transformer and connected to the back of the CRT -- for free.


.
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W5ONV
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« Reply #10 on: December 26, 2007, 03:46:47 AM »

 Try a local sign installation/repair company that works on neon signage.
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WA7NCL
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Posts: 625




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« Reply #11 on: December 26, 2007, 11:55:51 AM »

The center conductor out of coax (especially RG8 types) has high voltage capabilities due to the thick layer of insulation.  The solid stuff would be best since the foam stuff is easily squished.  This used to be an old standby for homebrewing High Voltage wires.

I think even RG-58 or RG-59 center solid dielectric conductor would work for a KiloVolt.
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