Talk:Blaw-Knox tower

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Comment

Blaw-Knox made many different kinds of towers; not all of them were diamond-shaped. The following are the remaining diamonds known to exist and believed to have been manufactured and erected by Blaw-Knox:

WFEA (130 Manchester, N.H.): one of two in array (second tower is a flagpole)
WBNS (1460 Columbus, Ohio): day tower
WLW (700 Cincinnati, Ohio): main tower (backup is newer and of conventional construction)
WSM (650 Nashville, Tenn.): like WLW (they were built consecutively, by the same crew)
WBT (1110 Charlotte, N.C.): only one of the three towers is an original; the other two are reproductions from the original drawings after the originals were blown down in a hurricane

18.26.0.18 21:47, 11 May 2005 (UTC)[reply]

Radio Telescope

An 85 foot Radio Telescope was designed by Blaw-Knox Company in 1961/2 for Harvard University. This telescope was installed in Hartebeesthoek in South Africa to form part of the original NASA programme, NASA pulled out of South Africa in 1975 and the South African Governement kept the telescope running until the 3 October 2008. We urgently need to contact Blaw-Knox in Pittsburgh to see if any of these original drawings are available.

Contact: Cliff Eland www.sa.celand@hatch.co.za or tel +27 11 239 5352 —Preceding unsigned comment added by 196.22.209.243 (talk) 08:13, 5 November 2008 (UTC)[reply]

Radiator?

Looking closely at the Blaw-Knox structure photos on the main page, I do not see (possibly too small) any cables. Surely it isn't the structure itself that is the radiating element? Is it a cable suspended in the middle of the tower fed from the bottom? What a wonderful tower! So aesthetically appealing!
Cornelius Murphy (talk) 02:13, 12 March 2011 (UTC)[reply]

The structure itself most certainly is the radiator; all the ones I've seen (all of the extant U.S. ones mentioned in the article) are bog-standard insulated-base, series-fed antennas. 121a0012 (talk) 03:11, 12 March 2011 (UTC)[reply]

European examples

Is there any documentation that any of the European examples were actually built by the Blaw-Knox company? 121a0012 (talk) 16:04, 10 April 2011 (UTC)[reply]

Yes, there is -- see below. 121a0012 (talk) 01:19, 24 July 2011 (UTC)[reply]

1935 advertisement

Blaw-Knox placed an advertisement in the 1935 Broadcasting Yearbook advertising their "Guyed Type" and "Self-Supporting (Rigid) Type" "VERTICAL RADIATORS". They state that "Blaw-Knox Vertical Radiators are available in all heights from 79 ft. to 1050 ft." At that time, the company's address was 2038 Farmers Bank Building, Pittsburgh. The ad appears on page 210, and also gives a list of customers, which I transcribe below. No indication is given as to the significance of the order in which customers were listed, if there is any.

These Stations Use BLAW-KNOX VERTICAL RADIATORS for increased efficiency

WAAB—WNAC Squantum, Mass.
WABC Wayne, N. J.
WFEA Manchester, N. H.
WCAU Philadelphia, Pa.
WSM Nashville, Tenn.
WLW Cincinnati, Ohio
WNEW Carlstadt, N. J.
WBNS Columbus, O.
Budapest, Hungary
Vienna, Austria
WJR Detroit, Mich.
WHO Des Moines, Iowa
WBT Charlotte, N. C.
“El Mundo” Buenos Aires, Argentina
WJBO Baton Rouge, La.
KMBC Kansas City, Mo.
KSO Des Moines, Iowa
WHN New York, N. Y.
WKRC Cincinnati, Ohio
WAVE Louisville, Ky.
WIND Gary, Indiana
WIL St. Louis, Mo.
CKTB St. Catharines, Canada
Brazil Journal, Rio de Janeiro, Brazil
Radio Diffusora, Sao Paulo, Brazil
WPEN—WRAX Philadelphia, Pa.
WPRO, Providence, R. I.
WNEL, San Juan, Porto Rico
WTCN Minneapolis, Minn.
KGER Long Beach, Calif.
WFBR Baltimore, Md.
WBIG Greensboro, N. C.
KWKH Shreveport, La.
W1XBS Waterbury, Conn.
WOR Carteret, N. J.
CKY Winnipeg, Canada
WORK York, Pa.
WQAM Miami, Florida
WIBW Topeka, Kansas
CHNS Halifax, Nova Scotia
WMAZ Macon, Ga.
WSPD Toledo, Ohio
KTUL Tulsa, Oklahoma
WCFL Chicago, Ill.
CKLW Windsor, Ontario
call sign missing Kansas City, Mo.
WPPM (Police) Birmingham, Ala.
WPFO (Police) Knoxville, Tenn.
WPGS (Police) Mineola, L.I.
KGZX (Police) Albuquerque, N. Mex.
KGPB (Police) Minneapolis, Minn.
WPGL (Police) Binghamton, N. Y.
WPGH (Police) Albany, N. Y.
KGHX (Police) Santa Ana, Calif.
WPDY (Police) Atlanta, Ga.
KNFE (Police) Duluth, Minn.
U. S. Government, Kansas City, Mo.
U. S. Dept. of Commerce, 352 Radiators at Various Locations

121a0012 (talk) 01:55, 24 July 2011 (UTC)[reply]

Note on rights: this advertisement was published without a copyright notice in the United States in 1935 and is therefore in the public domain under U.S. law. 121a0012 (talk) 02:06, 24 July 2011 (UTC)[reply]