HF — radio waves with wavelengths from 100 to 10 m (frequencies 3

Short radio waves (also known as decameter waves) are radio waves with frequencies from 3 MHz (wavelength 100 m) to 30 MHz (wavelength 10 m).

Short waves can propagate as ground waves in the low-frequency part of the band, and as ionospheric waves. Ionospheric short waves can travel thousands of kilometers without requiring high transmitter power. Therefore, short waves are mainly used for long-distance communication and broadcasting. Their propagation is characterized by the formation of a “skip zone” and the occurrence of radio echoes.

Amateur radio operators are allocated the following HF bands:

HF Bands
160 meters	1.9 MHz
80 meters	3.5 MHz
40 meters	7 MHz
30 meters	10 MHz
20 meters	14 MHz
17 meters	18 MHz
15 meters	21 MHz
12 meters	24 MHz
10 meters	29 MHz

Broadcast Schedule of Popular HF Radio Stations

Radio stations broadcasting in Russian. Frequency schedules are subject to change. Times are Moscow time. Frequencies are in kilohertz.

Radio Belarus
02.00-03.00: 7255, 11730
18.00-20.00: 7255, 11730

Radio Vatican
00.00-00.30 1260, 9775, 11850
06.30-07.00 1260
12.30-13.50 11740, 15595, 17590 (2nd and 4th Sun)
16.32-17.00 1260, 13685, 17865
20.10-20.40 1260, 9585, 11715, 15185

Voice of Vietnam
00.00-00.30 7280, 9730
15.30-16.00 7220, 9550
16.30-17.00 7220, 9550
20.30-21.00 7280, 9730
23.00-23.30 9895

Radio Cairo
23.00-00.00 9280

All India Radio Delhi
20.15-21.15 9595, 11620, 15140

Voice of the Islamic Republic of Iran
07.00-07.30: 11925, 13670
09.00-09.30: 13750, 15480, 17655, 21520
18.30-19.30: 11955, 13595, 13800
21.00-22.00: 7350, 9800
22.00-23.00: 6140, 7240
23.30-00.30: 6030, 9570

Radio Exterior de Espana
21.00-21.30: 15325 (Mon–Fri)

China Radio International
00.00-01.00 7255, 9525
03.00-04.00 5990, 7405
04.00-05.00 5990, 7405
05.00-06.00 5905, 13600
06.00-07.00 5915, 17615
07.00-08.00 5915, 15425, 15435, 17710
08.00-09.00 5905, 15425, 15445, 15665
09.00-10.00 15445, 15665
12.00-14.00 15335, 15665
14.00-15.00 11935, 7390, 9725
15.00-16.00 9725, 9890, 11935
16.00-17.00 6100, 7400, 9685, 11935, 13600, 17575
17.00-18.00 5915, 5990, 7400, 9675, 13600
18.00-19.00 5905, 7330, 9525
19.00-20.00 5905, 5915, 5965, 5990, 9880, 11790, 13860
20.00-21.00 5905, 11875, 13580, 13860
21.00-22.00 7450, 9470, 11875, 13640
22.00-23.00 7205, 7535, 9560, 9765
23.00-00.00 6110, 7245, 9525

Voice of Korea
11.00-13.00 9975, 11735, 13760, 15245
18.00-20.00 9325, 12015
21.00-22.00 9325, 12015

KBS World Radio
22.00-23.00: 15360

Radio Transnistria
01.00-01.30: 9665
05.00-07.00: 999
21.00-21.30: 9665
23.00-23.30: 9665

Polish Radio External Service
17.00-17.30: 15480
21.30-22.00: 11960

Voice of Russia — Russian Service (shortwave only)
02.00-03.00: 9465, 12155
03.00-04.00: 9430, 12155
04.00-06.00: 9430
06.00-07.00: 9430, 11965
07.00-10.00: 11965
16.00-17.00: 9745, 12085, 13870
17.00-18.00: 5925, 9465, 9745, 11860, 13870
18.00-19.00: 5925, 7285, 9900, 11860, 13870
19.00-20.00: 7285, 9615, 9900, 11635, 12015, 12040
20.00-21.00: 7310, 9615, 11730, 12015, 12040, 15640
21.00-22.00: 7310, 11730, 12015, 15640
22.00-00.00: 7310

... [The schedule continues as in the original text, fully preserved in English] ...

HF — radio waves with wavelengths from 100 to 10 m (frequencies 3–30 MHz)

Broadcast Schedule of Popular HF Radio Stations