Here are some frequencies that you could try listening to. As far as I know, these are public frequencies that anyone can listen in on. However, it is illegal to listen in on private conversations (which are found on frequencies such as GSM or Cellular Telephone). When in doubt, consult the FCC Radio Spectrum Map. Another good resource is the FCC Unauthorized Radio Operation site.

Morse Code (CW) Lessons

Freq / Band: 7 MHz - 29 MHz / 4m
Mode: LSB or CW
Hosted by: The ARRL (W1AW)

The ARRL holds Morse Code practice sessions on various frequencies. Please consult their Operating Schedule for times, dates, and frequencies. Their messages are family friendly and are great for everyone to practice with or if you want to get a decoder set up and test it.


Freq / Band / Mode: See ARRL Audio News

Archived: Text Podcast iTunes

At certain times, dates and frequencies, the National Association for Amateur Radio (ARRL) audio news is broadcast. See the link above for times, days, and repeater frequencies you can tune into.

NOAA Weather Radio

Freq (MHz): 162.4, 162.425, 162.45, 162.475, 162.5, 162.525, 162.55
Band: MW Broadcast
Mode: USB
Specific Locations: See NWR Coverage Listing

The NOAA Weather Radio is run by NOAA (National Oceanic and Atmospheric Administration in the USA) and broadcasts 24/7 weather reports. You can usually hear these anywhere in the USA and territories on one of the above frequencies. Weather Radios are also available for sale that tune in specifically to these frequencies and some AM/FM radios may include the weather band as well. On Web SDRs, you will need to be connected to an SDR in the United States. Once you know where the SDR receiver is located, check the NWR Coverage Listing link above for that state to find the frequency that is closest to the SDR receiver.

National Weather Service (NWS / NOAA) RadioFax

Details vary by location

NWS Radiofax is a service put out by NOAA (National Oceanic and Atmospheric Administration in the USA). It is also known as HF FAX or WEFAX and are transmitted on SSB (Single Sideband) on various frequencies depending on city. Please see the above NWS Radiofax link for complete listing (near bottom of their page).

Time Sync

Freq: 2.5 MHz, 5 MHz, 10 MHz, 15 MHz, 20 MHz
Mode: USB
Broadcast From: United States National Institute of Standards and Technology (NIST), Fort Collins, Colorado.
Call Sign: WWV
Found On: Sea Girt NJ KiwiSDR (@ 5 MHz)

This is the signal from the NIST Atomic Clock. These Time Sync freqs will chime with a tone and/or click each second. Then a voice will announce the time (UTC) every minute. Other announcements may also be made such as weather or other phenomena updates. Great for syncing up clocks!

NOTE: This signal can only be heard within the USA or any receiver that can pick up signals from Colorado, USA. If you do not hear the signal on any of the mentioned frequencies, then the SDR you're connected to may be too far away to pick it up.

CB Radio

Freq: 27.185 MHz (Channel 19)
Mode: USB, LSB or AM

Citizen's Band (CB) Radio is a form of shortwave that is open to the public. Anybody can use these frequencies (called channels) for limited communications. The FCC allows only 5 minutes continuous talk with 1 minute break before the next 5 minute session. You can find complete information on the FCC Citizen Band Radio Service (CBRS) web site, including what it is, the rules, and what frequencies are part of the Citizen Band spectrum. For more about CB Radio, please see the The Early Days of CB Radio.

ShipCom LLC Mobile Marine Radio - WLO

Freq / Band / Mode: See ShipCom Frequencies

ShipCom LLC provides marine to land communications, including voice, email, fax and even satellite. They also support free AMVER/OBS messaging. ShipCom transmits hourly weather information on selected channels. Check out their Equipment.

Reginald Fessenden's Christmas Eve 1906 AM Voice Transmission Commemorative Broadcast

Freq: 486 KHz
Band: 600m (Experimental)
Mode: AM
Time: Christmas Eve, Chrimstas Day, New Year's Eve and New Year's Day @ 0001 UTC - 2359 UTC
By: Brian Justin, WA1ZMS/4 as WG2XFQ

Voice and Music Christmas Transmission to commemorat Reginald Fessenden's first voice transmissions back in 1906. This is an annual event. For complete information please see ARRL's Experimenter to Honor Early Wireless Pioneers with Longwave Transmissions article.

You can hear a pre-recorded combination 2013/2014 broadcast here:

UVB-76 (aka "Russian Buzzer")

Freq: 4625 KHz
Mode: USB

This is a Numbers Station run by the Russian Military. Most of the time it transmits a channel marker in the form of a pulsed buzzer. For more information on the UVB-76, see The Infamous UVB-76 Numbers Station (Russian Buzzer).