Re: Cable question

From: Daniel W. Hess                                pager; 214 910 8489
      1605 LBJ Fwy.                            Daniel Hess-at-Vnet.ibm-dot-com
      Dallas, TX  75234                          territory R21  B/O 519
Subject: Re: Cable question
Most modern ignition coil wire usde today is of the solid core type. The
old radio suppression wire went the way of the Kettering type of ignition
systems, (points & condenser, remember those things?) As far as I know,
most of the high energy ignition systems used today require solid con-
ductor wire.

I bought a high performance sparkplug wire kit at Walmart. Believe I got
20' of bright orange, 8mm, 18 ga. wire. It's silicon jacketed, very flex-
able, easy to work with, looks good and thanks to the silicon, high temp.
I use the stuff on my primary/primary circuit; Between the Xformer, the
chokes, everything up to the actual tank. When I graduate to a pig I will
probably look for something a little heavier guage, though. Think I paid
$8.00 for the kit. The sparkplug boots that came with the kit have found
a use to, in other hv applications.

Daniel Hess

*** Reply to note of 01/03/98 19:34
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Subject: Re: Cable question
Date: Sat, 3 Jan 1998 19:06:22 -0600
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From: 	Adam[SMTP:absmith-at-tiac-dot-net]
Sent: 	Saturday, January 03, 1998 6:00 PM
To: 	Tesla List
Subject: 	Re: Cable question

>From: 	Michael Baumann[SMTP:baumann-at-proton.llumc.edu]
>Sent: 	Friday, January 02, 1998 2:16 PM
>To: 	Tesla List
>Subject: 	Re: Cable question
>On Fri, 2 Jan 1998, Tesla List wrote:
>> >      4.  Get spark plug wire, from an auto parts store.
>> Spark Plug Wire is a misleading term.
>> More often than not, spark plug wires have no wire in them, but a carbon
>> fiber sort of conductor.  Also, the additional resistance used to
>> suppress RF may be more resistance than you might want to put into your
>> system.
>Exactly. What you must find is what is referred to as "Solid-Core"
>plug wire. Normally, the only place you can find this is in "performance"
>auto stores. Most people want the noise suppresion of resistor core
>plug wires, but speed freaks don't :)

Now, i'm kind of curious.  How much resistance are we talking?  I went to
the local auto parts store (the small business kind, with an old guy
behind a counter with shelves of parts), and asked him for some "normal"
ignition system hookup wire.  He had mostly kits of full wiring systems,
but the stuff he had in bulk looks like stranded 14 gauge copper with
about .120" of black rubber over it.  It measures 0.0 ohms for 5 feet,
and I can't see anything unusual about it.  It's definitely not what I
would condsider "performance" cable either- I've seen that stuff and it's
not 8 cents a foot.

So the question is: is the resistance really supposed to be in the wire
itself, or is there a resistor moulded into the end plug perhaps? Seems
to me that if you wanted #14 wire with a constant non-neglegible
resistance per linear foot, it would have to be made of something other
than copper.


Adam Smith
Epoch, Inc. Digital Music Project

www.tiac-dot-net/users/absmith/                 MP3 Demo Tracks Now Available!