Shively Labs FM Antennas and Accessories
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Technical Bulletins

Information of General Interest to the Broadcast Industry

NOTES: Some bulletins are in Adobe® Acrobat® format. You'll need Acrobat Reader®, a free download from www.adobe.com, 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 on Our Site:

Patch Panel Dimensions (425 kB)



Antenna Information

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)


Combining Digital & Analog Signals


Comparison of Mechanical vs. Electrical Beamtilt


Split-Feeding Balanced Combiner Systems


Effects of Altitude on Power Ratings


Gain of Full-Wave and Half-Wave-Spaced Arrays
A quick-reference chart.

Information on 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


Spectral Re-Growth
(Reprinted from Radio World Engineering Extra, 4/4/07)


Updated FM Combining Systems (523 kB including illustrations)
(NAB Handbook Chapter, 10th edition)

Information on Coax and Components

Coax Components Specifications


Power Rating vs. Frequency for Copper Transmission Line


Attenuation vs. Frequency for Copper Transmission Line


Effects of Altitude on Power Ratings

Last updated: 04/15/2008
Webmaster: Al Friend
© copyright 2008 Howell Laboratories, Inc.