ETF - Mechanical TV Stations

Mechanical TV broadcast in the AM radio band (550-1600 kHz) in 1928 and 29. With 24 and 30 line systems, only about 10 kHz of bandwidth was needed, so standard radio channels could be used. Some stations also broadcast in the shortwave band. Beginning in 1930, the 2-3 mHz band was used for television, with 100 kHz channel width. 60 line systems required about 40 kHz of bandwidth. TV broadcasts could be identified by their distinctive sound.

Call Sign	City	Operated by	On Air	Off Air	Lines	Frames/ Second	Freq.
VE9AK	Montreal, Canada	Peck Television	1935	?	60-150	?	41 mHz
W1WX, W1XAV	Boston, MA	SW and Television (Hollis Baird)	1929	1930	48	15	2120 kHz
			1931	1934	60	20	2.1-2.2 mHz
W1XAY	Lexington, MA	Boston Post, WLEX	1928	1930	48	18	3500 kHz 4.7-4.9 mHz
W2XB, WGY, W2XAD, W2XAF	Schenectady, NY	General Electric	1928	1928	24	20	790 kHz
			1928	1930	48	20
			1930	1939	48	20	2.1-2.2 mHz
W2XAB	New York, NY	CBS	1931	1933	60	20	2.1-2.2 mHz
W2XCD	Passaic, NJ	Lee DeForest	1931	1933	60	20	2.0-2.1 mHz
W2XCR	Jersey City, NJ	Jenkins	1930	1931	48	15	2.1-2.2 mHz
	New York, NY	Jenkins/WGBS	1931	1933	60	20	2.75-2.85 mHz
W2XBS	New York, NY	RCA	1928	1929	?	?	2.0-2.1 mHz
			1929	1932	60	20	2.75-2.85 mHz
WRNY	New York, NY	Hugo Gernsback	1928	1929	36/48	10	919, 1010 kHz
W2XR	Long Island City, NY	Hogan's Radio Pictures	1929	1934	60	20	2.1-2.2 mHz
W3XK	Silver Spring, MD	Jenkins	1928	1931	48	15
			1931	1934	60	20	2.0-2.1 mHz
W5AGO	Ft. Worth, TX	Truett Kimzey	1934	?	?	?
W5XA	Shreveport, LA	Paul L. Carriger	1929	1934	45	15
W6XAH	Bakersfield, CA	Pioneer Mercantile Co.	1932	1932	96	20
W6XS	Los Angeles, CA	Don Lee Broadcasting	1931	1935	80	20	2.1-2.2 mHz
W6XAO	Los Angeles, CA	Don Lee Broadcasting	1931	1936	80	20	44-50 mHz
W6KQ*	Los Angeles, CA	Amiee Semple McPherson	1931	?	?	?
W7XAO	Portland, OR	Wilbur Jerman	1929	1930			2.75-2.85 mHz
W9XAA, WCFL	Chicago, IL	Chicago Federation of Labor	1928	?	45	15	2.0-2.1 mHz
W9XAK	Manhattan, KS	Kansas State College	1932	1936	60	20	2.1-2.2 mHz
W9XAL	Kansas City, MO	First National Television	1933	1935	45	15	2.1-2.2 mHz
W9XAO	Chicago, IL	Western Television (Sanabria)	1930	1933	45	15	2.0-2.1 mHz
W9XAP	Chicago, IL	Chicago Daily News	1930	1933	45	15	2.1-2.2 mHz
W9XAT	Minneapolis, MN	George Young, radio station WDGY	1933	1938	125	?	42-50 mHz 60-86 mHz
W9XD	Milwaukee, WI	Milwaukee Journal	1931	1933	45	15
W9XG	West Lafayette, IN	Purdue University	1931	1939	60	20	2.1-2.2 mHz
W9XK	Iowa City, IA	State University of Iowa	1932	1939	45	15	2.0-2.1 mHz

* Station may never have gone on the air

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