[TowerTalk] Measured S-meter db/S-unit TS-450

Bob Duckworth wb4mnf@atl.org
Sun, 10 Aug 1997 18:50:07 +0100



>From 1 to 9 S units his is 25db (power ratio) = 50db voltage ratio
which is pretty darn close to 48db or 6db/S unit. As to what S9
means on K3KO meter, he'll have to measure it to find out.

My point.

If you use a voltmeter on the AGC line (your S meter will do if it's
calibrated) and remember that S units reference a voltage ratio
so that the 6db/S unit translates to 3db/S unit for a power ratio, 
and you stay in the linear portion of the AGC range, then you can
use your AGC voltage or calibrated 'S' meter to estimate antenna
db which are a power ratio as you do whatever you're doing with 
the antenna.


Calibrate, then measure.

-bob
wb4mnf

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