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Old August 8th 06, 06:12 AM posted to rec.radio.amateur.antenna,rec.radio.amateur.policy,rec.radio.shortwave
Roy Lewallen Roy Lewallen is offline
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First recorded activity by RadioBanter: Jun 2006
Posts: 1,374
Default STATION IS ON 13.556.00 MHz. LSB

Brenda Ann wrote:
"John - KD5YI" wrote in message
. . .


My guess is 3 mW.

John


The level is the same as emissions within the CB band:


Sec. 15.227 Operation within the band 26.96-27.28 MHz.

(a) The field strength of any emission within this band shall not exceed
10,000 microvolts/meter at 3 meters. The emission limit in this paragraph is
based on measurement instrumentation employing an average detector. The
provisions in Sec. 15.35 for limiting peak emissions apply.
. . .


The amount of power applied to an isotropic radiator which will generate
10,000 uV/m at 3 meters is 30 microwatts. This assumes that the 3 meter
distance is in the far field, or that it's measured in the far field and
extrapolated to 3 meters as though 3 meters were in the far field, which
is the method and assumption used by the FCC.

A simple dipole reduces the permissible power to about 23 uW, and ground
reflections will typically nearly double the field strength, so a safe
power level would be about 6 microwatts into a dipole antenna over
ground for someone interested in conforming to the regulations.

Roy Lewallen, W7EL