Архитектура Аудит Военная наука Иностранные языки Медицина Металлургия Метрология Образование Политология Производство Психология Стандартизация Технологии |
A Brief History of United States Operator Licensing Requirements and Military Training
In the Beginning
The First Laws 1912 to 1927
a) interfere with government or bonafide commercial stations (those open to public use) or
b) This meant that very, very many "little" stations and their operators did not need licenses. "Little" often included even those up to one kilowatt, the maximum allowed for any licensed station. This was because the "passive" (mostly crystal detector) receivers in those early days were so insensitive that reception over land masses beyond a hundred miles or so was exceptional. The word "amateur" does not appear in these regulations, but is covered by the term "experimental". [In England, by contrast, a license was required even for owning receiving equipment.]
From 1912 until 1933 operator and station licenses were separately issued and were impressive diploma-like documents about 8 by 11 inches. They had to be posted at the station location and were usually framed by the operator. Initially there were two classes of license, with identical qualifications. Amateur First Grade was by examination by a government examiner covering: radio laws, regulations, proper adjustment and operation of equipment, along with sending and receiving tests at 5 wpm in International Morse code. For those living too far away to come in for personal examination, there was an Amateur Second Grade whose applicant had to certify by mail that he could meet these identical requirements. In Aug. 1919 the required speed was raised to 10 wpm.
When the U.S. entered WW-I all radio activity, receiving as well as transmitting, except for that specifically authorized by the Military, was prohibited. All equipment (including all antennas) had to be either dismantled or sealed. This began on 17 April 1917 and continued until 12 April 1919 when receiving was once again permitted, and finally when amateur transmitting was again allowed on 1 October 1919. 1923: a new Extra First Grade was created requiring at least two years experience as a licensed operator.
A new written examination included requiring the applicant to diagram a transmitter and receiver and to explain the principles of their operation, plus a code speed test at 20 wpm (the speed required of a Commercial First Class operator). The license was printed on pink paper! Such operators were qualified for "Special" station licenses, which conveyed CW privileges on certain wavelengths longer that 200 meters and also gave them distinctive call signs. As shorter wavelengths came to be used this grade of license lost popularity. In the early 1920's licensed amateurs began to get skittish about working unlicensed stations (with their self-assigned calls), including the "little boys with spark coils." (They were often a big annoyance and source of interference.) The Department of Commerce, however, seems to have taken little notice of them unless they caused serious interference
The Radio Act Of 1927
Operator and station licenses combined on wallet sized card. The special endorsement (of 1929) became available for all amateurs with at least one year of experience, upon passing a special test on radiotelephone subjects. This endorsement was now extended to include use of phone on 75 meters also.
1933 And After
1951 And After
Volunteer Examiners
Various Military Training Requirements
For operators in the WW-II period Signal Corps graduation requirements were: 25 wpm plain language, 20 wpm code groups with pencil or mill, receiving, and 25 wpm sending. Qualifications for field operators - 20 wpm pencil printing copy and perfect sending copy at 15 wpm; for fixed base operators - 35 wpm straight copy on mill.
For Marine Corps graduation they were: 20-23 wpm plain text, 15-18 wpm coded groups, 17 wpm perfect sending of plain text. WWII training varied widely between various schools, but included actual operating procedures though wired QSO's among themselves to overcome the beginners' initial "buck fever" and to set them up as operators.
Real radio interference -- learning to copy through QRM and noise -- was added, and it became louder as the student progressed. Advanced students also practiced on the "mill" (typewriter). For high speed training, there was a room where high speed press was copied for practice.
In 1988 a U.S. Special Forces radio operator's test required 18 5-character groups (e.g., QY9/Z 6G.J4 X5,B7, etc.) a minute. Chapter 34 |
Последнее изменение этой страницы: 2019-04-19; Просмотров: 225; Нарушение авторского права страницы