[Amps] Coax for MHV connectors?

[Roger (K8RI)]

On 6/23/2012 6:39 PM, Jim Barber wrote:
> I need to make up some MHV cables for a 4KV 2A max DC supply, (both B+
> and B-) and I made the mistake of looking up the voltage ratings for
> RG-58, RG-59 and LMR-240 cables, all commonly used with those connectors:
>
> RG-58        1900V
> RG-59        2300V
> LMR-240      1500V

My choice would be "none of the above". I say that as do not like these 
particular cables except for low power RF.
The 240 series be it LMR or CNT are too fragile and have a  solid center 
conductor. I do not like the foil shield which is bonded to the 
dielectric which is great for RF.
   I've used automotive ignition "wire" in the past. A variety of High 
voltage connectors are usually available on e-bay. Just search on High 
Voltage Connectors.

73

Roger (K8RI)
> In a word, yikes! RG-59 has the highest rating, but I like it the least
> for exposed cables because of the solid center conductor
> The connectors are rated at 5KVDC, but what cable type? It seems like
> every time I think I know something... ?
>
> I'm tempted to give it up and machine my own bulkhead pass-throughs out
> of acrylic and use HV cable instead. In fact I would have already except
> I'd really like the cables to be detachable.


> Comments?
>
> Thanks,
> Jim N7CXI
>
>
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