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There are hundreds of "formula" sites on the web - for calculating everything from 3 phase power requirements to 5 gig antenna dimensions. Instead of reinventing the wheel, here are some favorites that can save you some time. Also included are info links. The best place to start?


Starting Out - Finding your way around

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AM Page

AM Query

FM Page
FM Query

TV Page
TV Query

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Broadcasting Tools, Calculators and Converters

FAA tower lighting issues including lamp outages

Radio and Television Station Self-Inspection Checklists.

If you have an alternative inspection program in your state, you can use these FCC documents as references for evaluating your facility's compliance with FCC rules in advance of inspection.  If you have no such plan, a walk-through of your facility with your engineer or consultant, along with the appropriate list, will go a long way toward preventing violations and fines should you receive an FCC inspection.  Links are to in order to ensure the latest version.

AM Broadcast Station Checklist (Sept. 2009)
FM Broadcast Station Checklist (Sept. 2009)
TV Broadcast Station Checklist (Sept. 2009)
Class A TV Broadcast Station Checklist (Sept. 2009)
FM Translator Checklist (June 2008)
LPFM Checklist (June 2008)
Low Power TV, TV Translator & TV Booster Checklist (May 2010)



Sun Fade" Calculator:  For everyone using satellite dishes, here's a link to a sun fade calculator to figure your spring and fall outages.

DATUM Conversions:  Most new devices record in NAD83.  Working with FCC databases will require conversion either to or from NAD27.  You can do that here.

Tech Formulas: (does anyone use "formulae" anymore?) NB: The accuracy or lack of accuracy of any of these calculators is determined by the originator. Please give them credit for working or the Bronx cheer if they don't give you what you need!

dB and Power Calculator
Air Coil Calculations
Bessel Function Calculator (a PDF from Agilent. Spoiler alert: 13,585Hz is the magic number)
Capacitive Reactance
Wire Resistance
Resistors in Parallel

RF Calculators
RF Impedance Calculator
Transmission Line Calculators
Resonant Frequency Calculator
Another Resonant Frequency Calculator
Q Calculator
General Radio Formulas and Programs
Smith Chart Calculator
VSWR Calculator

More General Calculators:

Regulator Current Limiting Resistor Calculator
Transistor Bias Voltage Calculator
Capacitance Time Constant Calculator
Four, Five, Six Color Band Resistor Line Calculator
Transistor Switch Saturation Degree Calculator
LED Light-Emitting Diode Current Limiting Resistor Value
Flat-Plate Capacitance Calculator
Wheatstone Bridge Calculator
Power Calculator
Inductance And Capacitance Calculator
Ohms Law Calculator
FET buffer calculator
Voltage Divider Resistance Calculator
Parallel resistance calculator
RC filter cutoff frequency calculator
Temperature Conversion Calculator
Cube root. Square root calculator
Also check RF Cafe

...and a slew of calculators for power, horsepower, and lots more here.


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