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Old 19th August 2010, 01:48 PM   #1
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Default High voltage electrical wire for ESL

I am looking for high voltage electrical wire for ESL.
I did find some which is cheap but rather big: diameter of about 6.6mm.
This kind is wire is normally used for neon lights and is rated for 10kV.
I would like to find some much thinner (between 2.7 and 3.4mm), for wiring the tweeters of ESL57 thus capable of withstanding only 1.5kV. I would use it as well for internal wiring of bass panel.
Nexans produces such cable (HT 306) but I do not need 100m of cable (Farnell sells it).
Where can I find such wire ?
Quad fan ! One hobby: re-build ESL 57
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Old 19th August 2010, 04:34 PM   #2
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1.5KV should be pretty easy. Maybe some ordinary Teflon hook up wire with an added piece of Teflon tubing? Not sure where to get it, but there's also test probe wire rated for that, as well as the wire used on the HV terminal of CRTs.
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Old 20th August 2010, 02:23 PM   #3
Calvin is online now Calvin  Germany
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double insulated litz wires or silicone insulated litz wires used for measurement purposes are ok. The thickness of the insulation is more than 1mm which is good for much higher voltage than specified. Diameters range from ~2.5mm to ~4mm.

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Old 20th August 2010, 03:40 PM   #4
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Stereophile did an article on rebuilding Quads back in 06. It has several sources listed for parts, including one for wire. I use them in two rebuilds I did and they worked well.
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Old 20th August 2010, 09:03 PM   #5
DaveG is offline DaveG  United States
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Allied #885-0097

Pomona Electronics - 6733-0 - Wire - Hook-Up - Allied Electronics
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Old 20th August 2010, 09:22 PM   #6
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Originally Posted by DaveG View Post
This one looks great ! 3.65mm for diameter if I compute well.
Thanks everybody for your answers: not sure I find the one above in
my neighbourhood thus I will explore other suggestions as well.
Quad fan ! One hobby: re-build ESL 57
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Old 20th August 2010, 09:25 PM   #7
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I think ignition or spark plug wire would work too...
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Old 21st August 2010, 05:48 PM   #8
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Originally Posted by Rodeodave View Post
I think ignition or spark plug wire would work too...
Especially if they are made of high resistance thread wound around or totally encapsulated into ferrite impregnated plastic core , thus having 10-50k Ohm per meter as well as substantial inductance.
Really old ones with copper conductors will do...
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Old 21st August 2010, 06:03 PM   #9
bentl is offline bentl  Norway
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Hi, I must admit that when I built my ESL@s I used what I had of cables.

Bias-voltage is run through thin (0,25mm) tefloncoated hookup wire, and signal before and after stepup trafo is normal speaker cable.

I have a bias voltage adjustable between 0 - 7200v normally running at 5500vdc and signal voltage is max 6000v.

I have not had any problems, flashovers etc.


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Old 22nd August 2010, 01:54 AM   #10
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One trick is to go buy some PVC tubing at Lowes or Home Depot etc, and slide a standard piece of wire inside it. It's not elegant, but particularly for prototyping it's hard to beat the ease and price.

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