Shively Labs FM Antennas and Accessories
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We'll be in Booth #C2624 at NAB, April 7 through April 10, in Las Vegas, NV.

Paul Wescott obit:

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

Product News

We're restructuring our prices starting May 1, 2014. Contact Sales for a new price list!

Check out our new
[award-winning; see below]
Versa2une field-tunable FM antenna!

... and our new Model 6025 log periodic antenna!

4/11/13 at NAB:
New Cool Stuff Award for our
Versa2une field-tunable FM antenna!

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Shively Labs is Maine's Small [Business] 2012 Exporter of the Year!
More information ...

Our parent company, Howell Labs, was just named SBA's 2013 Region I Subcontractor!
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Shively Labs has won a techINK 2010 Innovation Award for our Graphical Power Meter system!
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Our Model 6020 antenna brings home the Radio World Coolstuff Award!

newNew 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

Handy Calculators for RF Engineers

Calculators are Microsoft Excel spreadsheets.
These materials are for your on-line use. Please note that some are copyrighted. Contact Shively for copying and distribution information.
IBOC Injection Analysis
For high-level (non-coherent) and mid-level (coherent) IBOC injection.
  • The calculator for high-level (non-coherent) IBOC injection is used to analyze the combining of a single digital transmitter and a single analog transmitter for broadcast over a common antenna. By adjusting the “Analog Output” (amount of analog power being sent up the transmission line) and “Coupler” values, it is possible to get a complete overview of the entire power budget of the transmission system (with the exception of line losses). This makes it possible to determine the most cost effective coupling solution.
  • The calculator of mid-level (coherent) IBOC injection is used to analyze the combining of an existing analog transmitter and a new, combined analog/digital transmitter for broadcast over a common antenna. “Total Analog Output” is the total analog power of the combined transmitters that is being sent up the transmission line.

Dissipated Power and Heat Generated in a Filter
If you know your transmitter power and your insertion loss in dB ...

Last updated: 11/07/2006
Webmaster: Al Friend
© copyright 2006 Howell Laboratories, Inc.