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Old October 8th 05, 02:46 AM
Jerry
 
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Default Antenna Length Formula

On Fri, 07 Oct 2005 02:33:10 -0400, Al Klein
wrote:

On Thu, 06 Oct 2005 17:34:46 GMT, "mikeFNB"
said in rec.radio.scanner:

if it's for RX the imp matters not


That old nonsense again?

SWR isn't directional. Of course impendence matters, unless you don't
care how much signal you lose between the source and load.


Ah yes, that old nonsense again,

Yes, it is true that you will not damage a receiver with impedance
mismatch, but you will have less signal. Signal budget, system budget,
call it what you may.

And the beat goes on . . . . .

Jerry
ARINC LAXMM

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Old October 17th 05, 02:38 AM
Brian Aase
 
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Default Antenna Length Formula

Does this (or should it?) include any correction for propagation
factor?
---
On Sat, 15 Oct 2005 13:53:29 GMT, kla1899 wrote:

wrote in
oups.com:

2808 divided by the frequency in MHz will give
the length in inches for a 1/4 whip. Roughly
17.5 inches. Times 4 will give you a full wave.

cut

Due it's to simple, click the link:

http://mysite.verizon.net/moment_1/s...alculation.htm

put in your frequ hit Calculate "DUNE"



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Old October 17th 05, 02:51 AM
Al Klein
 
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Default Antenna Length Formula

On 17 Oct 2005 01:38:34 GMT, Brian Aase said in
rec.radio.scanner:

Does this (or should it?) include any correction for propagation
factor?


For a whip? Not unless you're running a ground wire alongside it. Did
you mean correction for end effect? (The prop factor is affected
mainly by the capacitance between conductors along their length.)
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