ve2pid wrote:
On 28 déc, 09:52, Cecil Moore wrote:
John Smith wrote:
... perhaps Cecil is aware of something?
I'm wondering if he means "reactance" instead of
inductance. The reactance to ground is capacitive
for a solid disk.
--
73, Cecil http://www.w5dxp.com

Hello to all,

The context is this: We are discuting about capacitance hats.. It
seems that the name is confusing, since it adds inductance instead of
capacitance to an antenna.

So, since a solid disk adds inductance (the resonnant freq of the
antenna drops), we are looking for a formula to evaluate that
inductance (and then inductive reactance)..

BTW, why don't we use the name 'inductive hat'...??

Sorry, when replying to Cecil, I missed this post ... thanks for posting
back. Yes, in the scope of my knowledge, it WOULD, indeed, add
inductive reactance to the antenna, however, as Cecil seemed to imply,
the effect of the capacitive reactance, you are also adding with the
disk, overwhelms the inductive ... however, Cecils' input will be the
correct one; consider mine a guess.

Regards,
JS