[Heathkit] High Voltage Wires for New Wiring Harness

[Carl]

RG-58 will easily handle that voltage Lee as its rated at 1900V. Youre 
probably thinking of the foam version.
Teflon is not a HV cure-all either. Various thicknesses have different 
ratings. The small hookup size is usually 500V.

Carl
KM1H


----- Original Message ----- 
From: "L L bahr" <pulsarxp at embarqmail.com>
To: <heathkit at mailman.qth.net>
Sent: Wednesday, January 18, 2012 10:55 PM
Subject: [Heathkit] High Voltage Wires for New Wiring Harness


>
> Maybe someone on here has a few ideas to solve my problem.
>
> I am re-kitting a really rough Heathkit DX-100.  Presently,  I have it all 
> torn down to parts and am having the chassis re-plated.  Then I plan to 
> rebuild it like a new kit with new resistors, caps, hardware etc.  (I have 
> almost all the new parts I need ready to be used).  I also have to make up 
> a new wiring harness as the old one is now cut out short plus the plastic 
> has hardened over the years from age and heat.  My plans called for making 
> the harness up with colored Teflon wire I have in the shack.
>
> However, that said, I have a BIG problem with a couple of the wires within 
> the wiring harness.  There are a few RED and one YELLOW wires carrying 
> high voltage.  With modulation the voltage could reach almost 1500 volts 
> on peak  (750 volts static).  Heathkit used the same gauge wire on these 
> lines but the insulation is much thicker on them.  I'm guessing the wire 
> gauge on all the wires is around a number 18 or 20 gauge wire.  I'd guess 
> the insulation on the existing higher voltage wires brings the outside 
> wire diameter with insulation to around 1/8th inch.
>
> Here is the question, where can I obtain some RED and some Yellow 18 or 20 
> gauge wire with insulation good for 1500 volts I can buy in small 
> quantities? I'm guessing I need around 12 foot of Red and maybe 3 foot of 
> Yellow.  I'd have to really check to see if my lengths are correct, but as 
> you can see,  I need very little wire.  If this doesn't work, where could 
> I buy the needed wire in any other color including clear?
>
> I thought of the center conductor of RG-58A/U coax cable but when I looked 
> up the Beldon spec I was shocked to see it is only rated at around 300 
> volts.  I got the idea knowing Drake used the center conductor of RG-8U 
> for their high voltage leads in the L4 and L-7 amps.  (RG-8/U center 
> conductor would just be too large in diameter for my needs.
>
> Anyone on here with ideas I could use for my project?  (I know it would be 
> cheaper to buy another transmitter in better shape, but that is not the 
> direction or path I am taking.)
>
> Thanks,
>
> Lee Bahr, w0vt
> Kingwood, Texas
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