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BRITISH APPROVE MARCONI PLANE RADIO
The new Marconi radio set type ADSm has been approved for use in civil aircraft by the British Air Ministry, according to British information received by the Communications Section, Depart¬ ment of Commerce.
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The set incorporates a. transmitter of 150 watts power suitable for the transmission of both telegraph and telephone signals. The improvements include a new type of receiver which is particularly selective and stable, employing a screened-grid high-frequency amplifying valve, of the latest type, a detector valve operating on the grid-leak method of rectification and provided with capacity reaction, and a transformer-coupled low-frequency magnifying valve; for maximum efficiency of high-frequency selection, an aperiodic aerial system is coupled to a closed tuning circuit. The model is adjustable to any wavelength between the approximate limits of 550 and 1550 meters on machines having normal electrical capacity.
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APPLICATIONS RECEIVED BY FEDERAL RADIO COMISSION
August 26 WAAK. Inc. , Port Newark, Newark, N. J. , C. P. to change equipment and increase power from 2 KW day and 1 KW night to KW day and 1 KW night, on 1250 kc; WCAH, Commercial Radio Service Co. , Columbus, Ohio, modification of license to increase power from 500 W. to 1 KW,day and 500 W. night, on 1430 kc. ; WHAT. Independence Broadcasting Co. , Philadelphia, Pennsylvania, C. P, to install new equipment, change frequency from 1310 kc. to 610 kc. , increase power from 100 w. to 500 w. , and operate part time, station now shares with WFKD; KONQ, Mission Broadcasting Company,
San Antonio, Texas, request for authority to install automatic frequency control; KTAP. Alamo Broadcasting Co., Inc., San Antonio, Texas, license to cover C. P. issued 6/30/30 to rebuild transmitter and move transmitter locally; WDBO. Orlando Broadcasting Co. , Inc. , Orlando, 'Florida, C. P. to make changes in equipment and increase modulation; KFSD, Airfan Radio Corporation, Ltd., San Diego, Calif., request for authority to install automatic frequency control.
America, Oil
Augus t
29
_ WLBW, Radio-Wire Program Corporation of
City, Pennsylvania, amendment filed to C. P. to request authority to erect an additional transmitter at Nicholson Heights, Trie, Penn. , to synchronize with present transmitter, experimentally, instead of to move present transmitter to just outside of Oil City, Penna. ; KFIO. Spokane Broadcasting Corporation, Spokane, Wash., license to cover C. P. issued 7/18/30, to move studio and transmitter
_ _ .i ^ ~i _ _ „ • _ ry r~ r\ r\ “i m t**> • . * _ _ _ _
Joca^-Py;_ 0. 0. Black. Approximate location: 3500 16th St., Birming¬
ham, Alabama, amendment
1010 kc. instead of night.
1200
made to C. P. for kc. , with 500
new station to request power day and 250 w.
watts
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