Radio broadcast .. (1922-30)

708 RADIO BROADCAST ADVERTISER FROST-RADIO No. 530 Socket for all new type tubes The new No. 530 FROST-RADIO Socket takes ALL of the new type tubes. It is made from black polished Bakelite, and has sturdy contact springs which hold the tube prongs for almost their entire length. Price 40c at your nearest dealers. The No. 630 is a rich-looking socket because it is made from real Bakelite. Takes all the new typ« tubes. Price »0o Note the spring construction as revealed by this cut-away view. These sturdy springs are held between cast bosses, and stay put. When the tube is inserted each prong is gripped the full length on two sides and held in a vicelike grip. Dirt cannot remain on the springs or prongs here. HERBERT H. FROST, Inc. 314-324 WEST SUPERIOR ST., CHICAGO New York City Cleveland Kansas City Los Angeles Export Office: 314 W. Superior St., Chicago Blackburn Ground Clamps Telephone companies using MILLIONS. Adjustable — fits any size pipe. Requires no pipe cleaning — screw bores through rust and scale. Send 12 cents for sample and postage. Blackburn Specialty Company 1960 E. 66th St. Cleveland, O. OTtXS PERFECT REPRODUCER Loud, Pleasing tone. Handsome material. Distinctive design. Horns, $22.50 to $30.00 Units, 10.00 to 12.00 American fflectric State & 04th Sts. COMPANV Clih-aeo ShortWave Stations of the World '"THIS list, containing more than a hundred short-wave stations situated throughout the world, is * about the most completely accurate one yet to be printed. The Traffic Department of the Radio Corporation of America cooperated in its compilation. Included in this list are stations known to be operating on the wavelengths given, stations licensed for operation, and stations which have been in operation to any considerable extent during the past year, and which are not definitely discontinued. CALL SIGNAL POP 2XS 2XAW 2BR POP NKF 2BR POP 2XAD KFVM POP NAL NEPQ NKF WIK 2 YT POY FW NKF AGA PCMM POW 2X1 NAL 2YT ANE NAJ WQO PCMM PCUU KFVM NAS NAJ NPG NRRL NOW 2XAC NKF 2XAF 5XH FW WIZ WQO KZA KZB PCLL WHO NPM 2XAD SAJ WQN NPU NBA NKF WQN KFKX ANF 1 XAO WQN KDKA KDC 2YT KDKA 8XS NPO WRB WRP 2 XAO POX NPO Nauen, Germany .... Rocky Point, New York . . . Schenectady, New York . Chelmsford, England Nauen, Germany Anacostia, District of Columbia Chelmsford, England Nauen, Germany .... Schenectady, New York . SS Iilalia Nauen, Germany .... Washington, District of Columbia USS Relief .... Anacostia, District of Columbia . New Brunswick, New Jersey . Poldhu, England Nauen, Germany .... Sainte Assise, France Anacostia, District of Columbia . Nauen, Germany Kootwijck, Holland .... Nauen, Germany .... Schenectady, New York . Washington, District of Columbia Poldhu, England Malabar, Java Great Lakes, Illinois .... Rocky Point, New York . . . Kootwjjck, Holland .... Kootwijck, Holland .... SS Idalia Pensacola, Florida .... Great Lakes, Illinois .... San Francisco, California . . . USS Seattle USS New Mexico Schenectady, New York . Anacostia, District of Columbia . WG Y— Schenectady .... New Orleans, Louisiana. . Sainte Assise, France New Brunswick, New Jersey. Rocky Point, New York . Los Angeles, California . Los Angeles, California . Kootwijck, Holland .... Sharon, Pennsylvania Honolulu, Territory of Hawaii Schenectady, New, York . Karlsborg, Sweden .... Rocky Point, New York . Tutuila, Samoa Balboa, Canal Zone .... Anacostia, District of Columbia. Rocky Point, New York . Hastings, Nebraska .... Malabar, Java Belfast, Maine Rocky Point, New York . . . East Pittsburg, Pennsylvania Casper, Wyoming .... Poldhu, England East Pittsburgh, Pennsylvania . East Pittsburgh, Pennsylvania . Cavite, Philippine Islands Miami, Florida Miami, Florida Belfast, Maine Nauen, Germany .... Cavite, Philippine Islands FREQUENCY IN KC. 22209 20082 19988 19988 IST.'iS 18738 NERM USS Los Angeles San Diego, California . . . . Anacostia, District of Columbia. San Diego, California New Brunswick, New Jersey. Paris, France USS Pope USS Canopus Great Lakes, Illinois . Quantico, Virginia Iwatsuki, Japan SSJdalia Lakehurst, New Jersey Schenectady, New York . San Francisco, California Anacostia, District of Columbia . Moscow, Russia ... Anacostia, District of Columbia. Paris, France San Diego. California Kahuku, Territory Hawaii Poldhu, England Bolinas. California . . . . East Pittsburgh, Pennsylvania . Nauen, Germany Norfolk, Virginia Tuckerton, New Jersey . SS Big Bill Schenectady, New York . SS Eloise SS Facile SS Gallavant Belfast. Maine Paris, France SS Nirvana SS Bridget NQG NKF NPL WIR SFR NUQB NIRX NAJ NFV J1AA KFVM NEL 2XK NPG NKF! ROW NKF SFR NQG KIO 2 YT KEL 8XS POX NAM WGH WHU 2XK KFVT KFHV KFWJ 1 XAO FL KFWK KFVB • Tested and approved by RADIO BROADCAST 16657 14991 14991 14991 14991 14991 14414 13628 11993 11993 11993 11758 11532 10903 10708 9994 9798 9369 9369 8630 8560 8328 7890 7496 7496 7496 7496 7496 7496 7496 7260 7160 7139 7139 6970 6814 6814 68!4 6518 6119 6119 5996 5996 5822 5657 5552 5511 5501 5354 5354 5354 5260 5100 5082 4997 4759 4475 4409 4383 4383 4283 4283 4283 (4283 (3548 4253 4205 4182 4052 3998 3998 3998 3945 3874 3795 3748 3748 3748 3701 3679 3612 3569 3527 3486 3331 3190 3156 3123 2998 2998 2911 2855 2751 2726 2726 2726 2677 2607 2607 2600 WAVELENGTH METERS 13.5 14.93 15 15 16 16 17 18 20 20 20 20 20 20.8 22 25 25 25 25.5 26 27.5 28 30 30.6 32 32 34 35.03 36 38 40 40 40 40 40 40 40 41.3 41.88 42 42 43.02 44 44 44 46 49 49 50 50 51.5 53 54 54.4 54.5 56 56 56 57 58.79 59 60 63 67 68 68.4 68.4 70 70 70 (70 to 184.5 70.5 71.3 71.7 74 75 75 75 76 77.4 79 80 80 80 81 81.5 83 84 85 86 90 94 95 96 100 100 103 105 109 110 110 110 112 115 115 115.3