Shively Labs FM Antennas and Accessories
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2712 Bandpass Filter


Small footprint, up tp 15kW with blowers

Catch us at:
2018 South Carolina Broadcasters Association Winter Conference and Broadcast Exhibition
Jan. 25
Columbia Metropolitan Convention Center
Columbia, S.C.
Proclaim 18 NRB National
Feb 28 Mar 2
Religious Broadcast Convention
Nashville, TN
NAB Show
April 7-12
Las Vegas Convention Center

Technical Bulletins

Information of General Interest to the Broadcast Industry

  • Some bulletins are in Adobe® Acrobat® format. You'll need Acrobat Reader®, a free download from, to read them.
  • These materials are for your on-line use. Please note that some are copyrighted. Contact Shively for copying and distribution information.


new Tips and Tricks to Make 222-G Work for You
10 Options for implementing IBOC
Split-feeding balanced combiner systems
Sweeping your system before applying power
Spectral re-growth
(Reprinted from Radio World Engineering Extra, 4/4/07)


High-power testing suite
(Two white papers on high-power breakdown testing and two videos showing actual tests)
Short course on isolators and FM antennas
(As seen in Radio World Engineering Extra, April 6, 2005)
Reducing downward radiation
(Presentation for FCC & FAA Engineering Staff, February 1997)
Matching FM antenna patterns and coverage
(From 1987 NAB Engineering Conference Proceedings)
Comparison of mechanical vs. electrical beamtilt
Effects of altitude on power ratings
Gain of full-wave and half-wave-spaced arrays
A quick-reference chart.
Updated Sizing of de-icer control box and wiring

Filters and Combiners:

Basics of balanced combiners
Short course on isolators and FM antennas
(As seen in Radio World Engineering Extra, April 6, 2005)
Introduction to cross-coupling
(Technical Presentation for 2000 Broadcast Engineering Conference)
Combining digital & analog signals
Low-level digital combining for multi-station installations
Using the Shively Labs fine-matching transformer to optimize high-power digital injection
Split-feeding balanced combiner systems
Updated FM combining systems (523 kB including illustrations)
(NAB Handbook Chapter, 10th edition)

Coax and Components:

Standard coax cutback dimensions (138 kB)
Coax components specifications
Power rating vs. frequency for copper transmission line
Attenuation vs. frequency for copper transmission line
Effects of altitude on power ratings
Guidelines for installation of flex coax
Installing a flange on 5/8" flex coax

Last updated: 06/07/17
Webmaster: Al Friend
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