[TowerTalk] ant model gain

[Gary Schafer]

If gain is expressed in DB it doesn't matter. If voltage is being measured
and it gives you a 6 db change between 2 different antennas they will also
give you a 6 db change if you are measuring power.

A receiver S meter is really measuring power delivered to the antenna port.
50 microvolts across 50 ohms gives an S9 indication on the meter. Double the
voltage to 100 microvolts and the meter should read 4 times the power or 6
DB higher.

73
Gary  K4FMX

> -----Original Message-----
> From: towertalk-bounces at contesting.com [mailto:towertalk-
> bounces at contesting.com] On Behalf Of Al Williams
> Sent: Monday, June 02, 2008 9:44 AM
> To: towertalk at contesting.com
> Subject: [TowerTalk] ant model gain
> 
> Is the gain reported in antenna models a gain of: E (electric field), I
> (magnetic field), or W(watts-W=EI)?
> 
> Also, Is the S meter in receivers in E (S9=50 microvolts) still in E when
> the scale switches to  x DB over S9?
> 
> k7puc
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