Shively Labs FM Antennas and Accessories
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Shows
Catch us at:
AFCEE Annual meeting, June 22-24 in NY City (Dale Ladner)
GABCON Georgia Association of Broadcasters, August 3-5 in Jekyll Island, GA (Dale Ladner)
Texas Association of Broadcasters, August 9-11 in Austin, TX (Jon Clark)
Tennessee Association of Broadcasters, August 15-16 in Murfreesboro, TN (Dale Ladner)
Alabama Broadcasters Association, August 18-21 in Hoover, AL (Dale Ladner)
AMITRA Congreso Internacional de Radiodifusion, August 24-27 in Acapulco, Mexico (Martyn Gregory, Dale Ladner, and Sean Edwards)
Awards

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Shively Labs is Maine's Small [Business] 2012 Exporter of the Year!
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Our parent company, Howell Labs, was just named SBA's 2013 Region I Subcontractor!
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Our Model 6020 antenna brings home the Radio World Coolstuff Award!
Articles

new"Shively trials new extended FM antenna in Brazil"

new"Shively’s new high power broadband on the air in South Dakota"

Paul Wescott obituary:"A damn good sense of direction, and a steady hand on the wheel, for over 30 years"

New technical bulletin: "Tips and Tricks to Make 222-G Work for You"

November-December 2011 Radio Guide article: "A Really Xtreme Build"

September-October 2011 Radio Guide article: "Shively Labs - Where FM Antennas Are Not Just a Sideline"

May-June 2008 Radio Guide article:
"Shively Labs Meets the Very Windy Mountain"

September 2007
Radio Guide articles:
"Shively Labs: Antennas That Work!" [279 kB]

"Shively 6014 Dual Hybrid Antenna Solves a Dilemma" [232 kB]

Archived articles

IBOC Options

(20 dB injection)


Option A: Single Station, Combined Digital/Analog Transmitter, Common Antenna



Option B: Single Station, Separate Analog and Digital Transmitters, Common Antenna, High-Level Combining



Option C: Single Station, Separate Analog and Digital Transmitters, Interleaved Antenna

Example: 6 kW ERP analog signal using 3-bay analog antenna and 2-bay digital antenna (no transmission line losses included):

Analog antenna input = 6,000 W (analog ERP) / 1.55 (analog gain) = 3,871 W
Analog return power = 3,871 W x 20 dB = 39 W
Digital antenna input = 60 W (digital ERP) / 0.99 (digital gain) = 61 W
Minimum isolator size required = 61 W + 39 W = 100 W.


Option D: Single Station, Separate Analog and Digital Transmitters, Separate Analog and Digital Antennas



Option E: Multiple Stations; Branched Combiner; Common Antenna



Option F: Multiple Stations; Branched Combiner; Separate Digital and Analog Antennas



Option G: Multiple Stations; Balanced Combiner; Combined Digital and Analog Input for Each Station



Option H: Multiple Stations; Balanced Combiner; Separate Digital and Analog Input per Station; Separate Digital and Analog Feeds to the Antenna; Single Antenna Input



Option I: Multiple Stations; Balanced Combiner; Separate Digital and Analog Input per Station; Separate Digital and Analog Feeds to the Antenna; Dual Antenna Inputs



Option J: Multiple Stations; Balanced Combiner; Split Transmission Lines to Feed Combined Digital and Analog Signals over Separate Transmission Lines



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Last updated: 01/06/2010
Webmaster: Al Friend
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