[Amps] RG8-U for HV cable

[wb8jkr at juno.com]

  I once used RG8 from a 12470 V 10KVA
pole transformer to the primary of a Tesla coil 
and never once had a problem.

Mark  WB8JKR


On Mon, 26 Jul 2004 10:54:59 +0300 Traian <yo9fzs at office.deck.ro> writes:
> Hello Will,
> 
> Thanks for info.
> Use of the coaxial cables for HV is not a surprise.
> Years ago, when  I was servicing TV sets, I found coaxial cables
> used for CRT anode connection for old B/W TVs, at 13 to 18 kV.
> Only solid polyethylene insulation cables, never foam.
> Some times they were used for helping filtering the HV also, the 
> extra
> length of the coaxial being coiled and fixed inside the TV set case.
> The first RG58 labeled coaxial I saw was used inside a B/W TV!
> The larger B/W TVs were using a RG59 like coaxial and sometimes
> the type used for the HV was the same type as the one used for
> the 75 ohm antenna input connection.
> Was hard to find a damaged coaxial insulation, unless it was melted
> because of touching (by accident) a very hot power resistor or 
> vacuum
> tube, or by HV discharge at the cable's end, but not because of the
> cable's poor insulation quality.
> 
> 73,
> Traian


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