wrote:

: On Wed, 12 Jan 2005 14:41:33 -0000, "Airy R.Bean"
: wrote:
:
: Discussed in the "Antenna Manual", by Woodrow Smith,
: pub "Editors and Engineers Ltd " dated 1948.
:
: He refers to the "Brown Ground Plane Antenna" and separately
: to the "Drooping Ground Plane Antenna"
:
: But does he refer to the 'drooping' as an impedance-matching device?
:
: If not, what reason does he give for the technique?

capacitance is prop to gap between plates.

On Thu, 13 Jan 2005 20:05:24 GMT,
(ZZZPK)
wrote:

wrote:

: On Wed, 12 Jan 2005 14:41:33 -0000, "Airy R.Bean"
: wrote:
:
: Discussed in the "Antenna Manual", by Woodrow Smith,
: pub "Editors and Engineers Ltd " dated 1948.
:
: He refers to the "Brown Ground Plane Antenna" and separately
: to the "Drooping Ground Plane Antenna"
:
: But does he refer to the 'drooping' as an impedance-matching device?
:
: If not, what reason does he give for the technique?

capacitance is prop to gap between plates.


I think you meant that it's inversely proportional to the gap between
the plates.

Bob, W9DMK, Dahlgren, VA
Replace "nobody" with my callsign for e-mail
http://www.qsl.net/w9dmk
http://zaffora/f2o.org/W9DMK/W9dmk.html

W9DMK (Robert Lay) wrote:

(ZZZPK)
wrote:
capacitance is prop to gap between plates.

I think you meant that it's inversely proportional to the gap between
the plates.

I've made the same mistake - said "capacitance" when I really
meant "capacitive reactance".
--
73, Cecil http://www.qsl.net/w5dxp


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On Thu, 13 Jan 2005 18:56:36 -0600, Cecil Moore
wrote:

W9DMK (Robert Lay) wrote:

(ZZZPK)
wrote:
capacitance is prop to gap between plates.

I think you meant that it's inversely proportional to the gap between
the plates.

I've made the same mistake - said "capacitance" when I really
meant "capacitive reactance".

No way, Cecil - you haven't made any mistakes this whole year!

Bob, W9DMK, Dahlgren, VA
Replace "nobody" with my callsign for e-mail
http://www.qsl.net/w9dmk
http://zaffora/f2o.org/W9DMK/W9dmk.html

W9DMK (Robert Lay) wrote:
No way, Cecil - you haven't made any mistakes this whole year!

Actually, it was probably a mistake to quote the "IEEE
Spectrum" magazine article regarding cellphones and
brain tumors. :-)
--
73, Cecil http://www.qsl.net/w5dxp


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Cecil Moore wrote:

: W9DMK (Robert Lay) wrote:
:
: (ZZZPK)
: wrote:
: capacitance is prop to gap between plates.
:
: I think you meant that it's inversely proportional to the gap between
: the plates.
:
: I've made the same mistake - said "capacitance" when I really
: meant "capacitive reactance".
: --

capacitance and capacitive reactance are two separate things.

one is always there and the other needs something else

ZZZPK wrote:
"Capacoitance and capacitive reactance are two separate things."

Yes. But, they are inextricably related by:

Capacitive reactance = 1 / 2 pi f C
where pi = approx. 3.1416,
f = frequency in Hertz,
Capacitance is in Farads, and
capacitive reactance is in Ohms.

Best regards, Richard Harrison, KB5WZI

(Robert Lay) wrote:

: : If not, what reason does he give for the technique?
:
: capacitance is prop to gap between plates.
:
:
: I think you meant that it's inversely proportional to the gap between
: the plates.
:

its still proportional....

On Sat, 15 Jan 2005 15:15:31 GMT,
(ZZZPK)
wrote:

(Robert Lay) wrote:

: : If not, what reason does he give for the technique?
:
: capacitance is prop to gap between plates.
:
:
: I think you meant that it's inversely proportional to the gap between
: the plates.
:

its still proportional....


That doesn't qualify as worthy of a response.
Bob, W9DMK, Dahlgren, VA
Replace "nobody" with my callsign for e-mail
http://www.qsl.net/w9dmk
http://zaffora/f2o.org/W9DMK/W9dmk.html

(Robert Lay) wrote:

: : I think you meant that it's inversely proportional to the gap between
: : the plates.
: :
:
: its still proportional....
:
:
: That doesn't qualify as worthy of a response.


a relative bearing is a bearing.

inverse proportional is a proportion.



a is a subset of b

get the idea ?