Beta is a time signal service in the VLF range in Russia, especially used by military offices.

Beta consists of the following transmitters

• RJH69 in Molodechno (Belorussia)
• RJH77 in Archangelsk
• RJH63 in Krasnodar
• RJH99 in Nizhny Novgorod
• RJH66 in Bishkek (Kyrgyzstan)
• RAB99 in Khabarovsk

These transmitters transmit time information on 25 kHz on a specific schedule. Additional synchronisation signals are transmitted on 20.5 kHz, 23 kHz, 25.1 kHz and 25.5 kHz. These transmitters are also used at times when no time signals are being transmitted to send other coded information.