Topband: Spark gaps

[DAVID CUTHBERT]

I do make (all too frequent) mistakes so check away. Carbon is 2000 times
more resistive than copper. Being more resistive the carbon skin depth at
lightning frequencies is much deeper than copper or steel (note the steel
is magnetically saturated).

Dave
On Jul 27, 2012 3:26 PM, "Mike Waters" <mikewate at gmail.com> wrote:

> Thanks, Dave. That's amazing, and I won't argue anymore, even though I
> didn't (and probably won't) check your figures.
>
> I would have thought that the carbon sphere would have a MUCH greater
> resistance than .003 ohms.
>
> 73, Mike
> www.w0btu.com
>
> On Fri, Jul 27, 2012 at 3:42 PM, DAVID CUTHBERT <telegrapher9 at gmail.com>wrote:
>
>> A ... one inch sphere about 3 m ohms. ... The observe heats 43 deg C
>>
>