Power & Antenna Info
following is National Radio
Clubs' standardized list of antenna designations:
D1 Day time operation only,
nondirectional antenna. D3 Day time operation only,
directional antenna, same pattern at all times. D4 Day time
operation only, directional during critical
hours only. D5 Day time operation only, directional during
non-critical hours, non-directional
during critical hours.
D6 Day time operation only, different patters during critical
hours and non-critical hours. L1 Limited time operation, non-directional. L3 Limited
time operation, directional pattern. N1 Night time operation, non-directional. N3 Night time
operation, directional. SH Specified hours. Numbers showing
pattern correspond to numbers under "U" category. ST Shared
Time; broadcasting time shared with another station(s) on the same
channel. U1 Unlimited operation, non-directional antenna.
U2 Unlimited operation, directional at night only.
U3 Unlimited operation, directional all hours, same pattern day
and night. U4 Unlimited operation, directional, different
patterns day and night. U5 Unlimited operation, directional
day, non-directional night. U6 Unlimited operation,
directional night and critical hours, same pattern. U7
Unlimited operation, directional all hours, but three different patterns
(day, night, critical) U8 Unlimited operation, different
directional patterns critical hours and night, non-directional day.
U9 Unlimited operation, different directional patterns
non-critical day hours and nights, non-directional critical hours.
U10 Unlimited operation, non-directional day, directional
critcal hours, non-directional nights.
psra - Pre Sunrise Authority. The power the
station is allowed to use from 0600 local to local sunrise utilizing the
Day Time - Local
Hours - Sunrise to two hours after sunrise and two hours
before sunset to sunset.
Limited time operation - Usually based upon sunrise
or sunset at the dominant station's location.
Night time operation - local sunset to
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