Author Topic: Convert frequency to wavelength  (Read 2560 times)

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AD

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Convert frequency to wavelength
« on: February 11, 2012, 10:24:33 PM »
You hear us talking about wavelength and frequency, but unless you have started to study, you have not seen this simple formula

wavelength = 300 / frequency in MHz

According to this formula, a frequency of 9680 kHz would be equivalent to a wavelength of 30.99 meters, which we would round to 31 meters. Thus, 9680 kHz, 9.68 MHz, and 31 meters all refer to the same operating frequency!

So in the "listening before you get your Lic" thread, where idial1911 mentioned 80 meters afterdark for the Georgia boys QSOing would be 3.600, 3.700, 3.800 to 4.000 mHz depending on your license class.   
« Last Edit: February 11, 2012, 10:27:46 PM by AD »
The only dumb question is the one that did not get asked!!

idial1911

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Re: Convert frequency to wavelength
« Reply #1 on: February 11, 2012, 10:27:43 PM »
This will also be helpful in understanding the different bands!

http://www.arrl.org/files/file/Hambands_color.pdf
The more I learn, the less I know.

AD

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Re: Convert frequency to wavelength
« Reply #2 on: February 11, 2012, 10:28:21 PM »
Dog!  beat me to it  :P
The only dumb question is the one that did not get asked!!

GDP

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Re: Convert frequency to wavelength
« Reply #3 on: February 11, 2012, 10:30:56 PM »
Yes, be sure to remember this formula gives the wavelength in METERS!  When you start measuring to build your dipole, you may have to convert to feet.  (that's the formula that uses 468 instead of 300).

The questions on the tests usually relate a frequency to a wavelength in meters, so the 300 number is the most used.

I know we're talking about just listening right now, but learning is a full-time job!
GDP

AngeryAmerican

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Re: Convert frequency to wavelength
« Reply #4 on: February 11, 2012, 11:18:51 PM »
Thanks, I like simple explanations, being simple and all.