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Re: ERP on V and L for AO-40 (Shouldn't this be mode U and L?)??



During the transponder test I found it almost impossible to get in the first
weekend.  Once LEILA was turned on I could get a usable signal into the
satellite near apogee with 6.5 watts (measured) into a 12 element linier
yagi.  If the gain of the antenna is in fact the quoted 14 dbi my EIRP would
have been 163 watts.

One thing I've been wondering is how many people are paying attention to the
FCC regs about 70cm power levels which impact a surprisingly large area of
the US.  The following is from 97.313:

    (f) No station may transmit with a transmitter power exceeding 50 W
PEP on the UHF 70 cm band from an area specified in footnote US7 to
Sec. 2.106 of part 2, unless expressly authorized by the FCC after
mutual agreement, on a case-by-case basis, between the District Director
of the applicable field facility and the military area frequency
coordinator at the applicable military base. An Earth station or
telecommand station, however, may transmit on the 435-438 MHz segment
with a maximum of 611 W effective radiated power (1 kW
equivalent isotropically radiated power) without the authorization
otherwise required. The transmitting antenna elevation angle between the
lower half-power (-3 dB relative to the peak or antenna bore sight)
point and the horizon must always be greater than 10\o\.

Then to find the affected areas we read in 2.106:

    US7  In the band 420-450 MHz and within the following areas, the
peak envelope power output of a transmitter employed in the amateur
service shall not exceed 50 watts, unless expressly authorized by the
Commission after mutual agreement, on a case-by-case basis, between the
Federal Communications Commission Engineer in Charge at the applicable
district office and the military area frequency coordinator at the
applicable military base. For areas (e) through (j), the appropriate
military coordinator is located at Peterson AFB, CO.
    (a) Those portions of Texas and New Mexico bounded on the south by
latitude 31 deg. 45' North, on the east by longitude 104 deg. 00' West,
on the north by latitude 34 deg.30' North, and on the west by longitude
107 deg. 30' West;
    (b) The entire State of Florida including the Key West area and the
areas enclosed within a 322-kilometer (200-mile) radius of Patrick Air
Force Base, Florida (latitude 28 deg.21' North, longitude 80 deg. 43'
West), and within a 322-kilometer (200-mile) radius of Eglin Air Force
Base, Florida (latitude 30 deg. 30' North, longitude 86 deg. 30' West);
    (c) The entire State of Arizona;
    (d) Those portions of California and Nevada south of latitude
37 deg. 10' North, and the areas enclosed within a 322-kilometer (200-
mile) radius of the Pacific Missile Test Center, Point Mugu, California
(latitude 34 deg. 09' North, longitude 119 deg. 11' West).
    (e) In the State of Massachusetts within a 160-kilometer (100-mile)
radius around locations at Otis Air Force Base, Massachusetts (latitude
41 deg. 45' North, longitude 70 deg. 32' West).
    (f) In the State of California within a 240-kilometer (150-mile)
radius around locations at Beale Air Force Base, California (latitude
39 deg. 08' North, longitude 121 deg. 26' West).
    (g) In the State of Alaska within a 160-kilometer (100-mile) radius
of Clear, Alaska (latitude 64 deg. 17' North, longitude 149 deg. 10'
West).
    (h) In the State of North Dakota within a 160-kilometer (100-mile)
radius of Concrete, North Dakota (latitude 48 deg. 43' North, longitude
97 deg. 54' West).
    (i) In the States of Alabama, Georgia and South Carolina within a
200-kilometer (124-mile) radius of Warner Robins Air Force Base, Georgia
(latitude 32 deg. 38' North, longitude 83 deg. 35' West).
    (j) In the State of Texas within a 200-kilometer (124-mile) radius
of Goodfellow Air Force Base, Texas (latitude 31 deg. 25' North,
longitude 100 deg. 24' West).




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