Heinl radio business letter (Jan-Dec 1931)

Page scan 0001189 from Heinl radio business letter

Record Details:

Title:
Heinl radio business letter
Date:
Jan-Dec 1931
Publisher:
Washington D.C. : Robert D. Heinl
Volume:
Heinl radio business letter (Jan-June 1931)
Leaf #:
0001189
Language:
English
Subjects:
Radio broadcasting -- United States – Periodicals, Radio -- Law and legislation -- United States -- Periodicals","Television broadcasting -- United States -- Periodicals","Television -- Law and legislation -- United States – Periodicals
Collection:
Broadcasting & Recorded Sound
Format:
Periodicals
Contributor:
University of Maryland College Park
Sponsor:
University of Maryland College Park
Coordinator:
Media History Digital Library
Description:
A private newsletter published out of Washinton, D.C. Robert D. Heinl meticulously tracked FCC actions and other policy developments and provided frequent updates to subscribers of the newsletter. A fascinating source for seeing how policy developments and regulations were received and interpreted within the commercial broadcasting industry. -- Eric Hoyt, 2018
Date Added:
August 29, 2024
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•CABLE II (Continued) rer Rating DeForest RCA Radiotron Western Electric Watts Type No, Type No, Type No. 500 561 UV-861 270-A 1000 — UV-851 — 5000 520-B RCA-1652 228-A 520-M 521 10000 507 UV-207 220-B 548 UV-848 563 UV-863 20000 ~ UV-858 35000 232-A 100000 UV-862 TABLE III 50 270*-A Section 5. No licensee shall change the number of vacuum tubes or change to vacuum tubes of different power rating in the last radio stage, or change the system of modulation except upon authority from the Commission. Section 4, The operating carrier power of. broadcast statations shall be determined from the antenna input power either (a) by direct measurement or, (b) by indirect measurement by means of the plate input power of the last radio stage. (a) The antenna input power determined by direct measure¬ ment is the square of the antenna current times the antenna resist¬ ance at the place where the current is measured and at the operating frequency. The direct measurement of the antenna input power will be accepted as operating power provided the data on the antenna resistance measurements are submitted under oath, giving detailed description of the method used and the data taken. The antenna current shall be measured by an ammeter of accepted accuracy. This data must be submitted to and approved by the Commission before any licensee will be authorized to operate by this method of power determination. Any licensee authorized by the Commission to determine the operating power by direct measurement of antenna input power shall not make any changes in the antenna system except upon authority from the Commission, (b) The antenna input power shall be determined by indirect measurement from the plate input power of the last radio stage by multiplying plate voltage by the total plate current of the last radio stage and by the proper percentage given in Tables IV, V, or VI, in accordance with the power and system of modulation used, 6