On Sat, 25 Oct 2003 07:09:10 -0500, Neil Down
wrote:

wrote in :

On Sat, 25 Oct 2003 02:21:12 -0400, wrote:

On Fri, 24 Oct 2003 22:23:48 -0700, Frank Gilliland
wrote:

In , lancer
wrote:

snip
Chrome has about the same conductivity that Stainless does, or at
least from the info I found. 3-15% for Stainless, 19% for chrome,
relative to copper.

For a conductor 102" long with a diameter of 0.625", the following
metals have the following AC resistance at 27 MHz:

Chromium .0194 ohms
Copper .00711 ohms
S. Steel .0451 ohms

http://www.amm.com/index2.htm?/ref/conduct.HTM

Chrome has 55% the conductivity of copper

Steel (all types ) 3% - 15%

17-7 ph stainless steel is used for most stainless antennas

Its resistivity compared to the standard (copper) can be found here
http://www.hpmetals.com/elec_resist.asp

Copper = 1.71 microohm-cm

17-7 ph = 83 microohm-cm

In other words stainless antenna stock has 2% the conductivity of
copper.


What type of material is the whip of the exterminator? SS right, the few
inches of copper or chrome material of that antenna will make little or
no difference what so ever, you guys are nit picking about something that
in this application is un noticeable.

The top section of that antenna is made from stainless steel. The top
section also has very little current flowing in it. The bottom
section has a majority of the current flow and does most of the
radiation. It maybe nit picking, but in theory the difference can be
seen. If you would see it in the real world is another question.