ON THE AIR with the Civil Air Patrol
March 1957 Popular Electronics
Back in the 1970s while
taking flying lessons, I used to enjoy watching the Civil Air Patrol run through its exercises at Lee Airport, in
Edgewater, Maryland. For some reason, I never bothered to look into joining. I wish I had. A few years later while
in Basic Training for the USAF at Lackland AFB, Texas, there were a couple guys in my squadron who had been
long-time members of the CAP and guess what? They only had to spend the first two weeks in BT, just long enough to
do all the paperwork processing, take a few of the classroom sessions, get shots, examinations, a head shave, and
to have uniforms issued. Then, immediately before leaving for technical school, they got to sew a stripe onto
their shirtsleeves as an Airman 1st Class. High school ROTC guys got to do the same thing. I don't know if the Air
Force still has that policy; you might want to check it out if you're planning on joining.
of Contents]People old and young enjoy waxing nostalgic about and learning some of the history of early electronics.
Popular Electronics was published from October 1954 through April 1985. As time permits, I will be glad to scan articles
for you. All copyrights (if any) are hereby acknowledged.
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ON THE AIR with The Civil Air Patrol
By Wayne Winters
evening last September a man slipped behind the wheel of his car in Albuquerque, New Mexico, switched on a radio
receiver and transmitter, and before he could back out of the driveway was halted by the urgent call: "Thunderbird
39 to any Albuquerque CAP station."
A quick reply to the Thunderbird (Arizona CAP station) operator brought no response, so switching off the car, the
Albuquerque Civil Air Patrol member beat a hasty retreat to his house, fired up a 75-watt fixed station and,
contacting Thunderbird 39, learned that the Arizona operator was worried about a plane overdue in isolated
Monument Valley in the Navajo Indian reservation, where there are no phones for a hundred miles.
A check with Civil Aeronautics authorities in Albuquerque brought the disturbing news that the pilot had left
Albuquerque at 4 :02 that afternoon in a light plane, estimating two hours en route to his Monument Valley
destination and carrying four hours of fuel aboard .... Now it was exactly 8 :00 p.m. The craft must be down
somewhere in the dark desert that would test a flyer's courage even in daylight.
Cadet operator works both high-frequency and very-high-frequency portable rigs at a practice mission. At top of
page, another operator is shown handling traffic while numerous CAP personnel await further orders.
Control headquarters may be set up in any handy location to direct search and rescue operations. The workshop of
a communications officer was utilized during a flood mission.
CAP member is talking into a lightweight v.h.f. packset which he designed and built; his car is equipped with a
high-frequency transmitter and receiver.
A typical father and daughter team; Cadet Carrie Hopkins of Albuquerque operates the radio while Lt. Col. Tom
Hopkins makes a log entry. Anyone over 14 years of age can join the Civil Air Patrol ranks.
Moments later, this
disquieting information crackled back to Thunderbird 39, and Albuquerque began preparations for an aerial search
at dawn .... Yet an hour later, even as alternate airfields were being checked, the Monument Valley station came
back on the air with the information that the pilot had landed at an emergency field and walked over the desert to
his destination. Plane and passengers were safe.
plays a big part in the Civil Air Patrol, the organization which is charged with a large part of the search and
rescue operations for missing aircraft. Some 10,000 stations, operating on frequencies "loaned" by the U. S. Air
Force, are distributed over the 48 states, Hawaii, Alaska, District of Columbia and Puerto Rico. By far the
greater part of these stations are installed in cars and trucks. Many "fixed" stations exist at airfields, CAP
unit headquarters, homes, and business offices. Not a few planes, either CAP-owned or private aircraft belonging
to members of the organization, are also equipped with two-way radios operating on CAP frequencies. A number of
walkie-talkie units are in the hands of ground rescue teams and prove invaluable in search operations to provide
communications between aircraft flying cover, or to send information from a crash scene back to a base camp.
The radio equipment used in CAP activities varies from station-to-station and state-to-state. Some gear is
supplied to the organization by the U. S. Air Force after it has been declared surplus. Other equipment is
purchased by the various units from their own funds. Still more is the private property of individual members, not
a few of whom are also "ham" operators.
In most cases power limitations are fairly low. A maximum of 400 watts output is provided for the one station in
each state that is authorized to talk across state borders, while the various other units are allowed either 150
or 75 watts of power to the antenna. Most of the mobile units run from 10 to 50 watts, with center-loaded antennas
being most common.
Seven frequencies are authorized as follows: Channel One, 2374 kc.; Channel Two, 2394 kc.
(Freehold and Fort Monmouth, .N. J., area only); Channel Three, 4325 kc.; Channel Four, 4507.5 kc.; Channel Five,
4585 kc.; Channel Six, 5500 kc. (one watt only); Channel Seven, 148.14 mc. An eighth channel, which will be in the
v.h.f. band somewhere close to the amateur two-meter frequency, is planned.
Until the last three or four years, almost all CAP traffic was carried on the high frequencies with
Channels Four and Five predominating. Now the use of v.h.f. Channel Seven is encouraged and an increasing number
of stations have added v.h.f. equipment to supplement the h.f. gear. This frequency is especially valuable where
short-range transmissions and air-to-ground communications are needed.
Civil Air Patrol transmitters must
be crystal-controlled. Their operators must hold restricted radiotelephone licenses or higher. The operation of
the stations must conform to all of the FCC regulations concerning frequency tolerances, type of emission, etc.
Accurate logs are required of each station's operation.
All Civil Air Patrol communications operations are
carefully regulated. "Hamming" is discouraged and an excessive amount of idle chatter is not tolerated. Regular
state-wide nets are scheduled at definite times each day during which traffic information is passed from
headquarters to local units and between individual stations.
In case of an actual mission or an emergency,
talking between states is permissible without the formality of using a state "control" station; but once such a
mission is definitely established, a "redcap" is declared and all transmissions are handled through the control
station. During the duration of a "redcap," all stations located in nearby states which might cause interference
with the communications either secure or go to different channels.
Many CAP units,
either Cadet or Senior squadrons, conduct courses in radio communications under supervision of competent licensed
personnel. Membership is open to all persons 14 years of age or over. There is nothing compulsory about the
organization. While it is an auxiliary of the Air Force, there is no obligation or arrangement for any Civil Air
Patrol member or unit ever to be taken into the armed forces as a result of his or her participation in the CAP
Although Civil Air Patrol radio communications is not connected with amateur radio, many hams
become CAP members and many CAP members develop an interest in radio and become hams .... Neither activity
conflicts with the other.
Many varied adventures reward the CAP volunteer. All too often, search and
rescue missions become necessary - several hundred a year. There are also practice missions, Cadet encampments at
Air Force bases, state and national meetings. Any man or woman interested in radio Civil Air Patrol has a definite
place to go to learn theory and actual operating practice on the world's largest network of two-way radio