RF Frequency Bands 1913

1913 RF Frequency Bands

Written by Godfrey Dykes

© RN Communications Branch Museum/Library

What the RF frequency bands were called in 1913


ROYAL NAVY			INTERNATIONAL
FREQUENCY RANGE	TITLE	ABBREVIATION	FREQUENCY RANGE	TITLE	ABBREVIATION
Below 100 kc/s	Low Frequencies	L/F	Below 30 kc/s	Very Low Frequencies	VL/F
100-1500 kc/s	Medium Frequencies	M/F	30-300 kc/s	Low Frequencies	L/F
1500-6000 kc/s	Intermediate Frequencies	I/F	300-3000 kc/s	Medium Frequencies	M/F
6000-10000 kc/s	High Frequencies	H/F	3-30 Mc/s	High Frequencies	H/F
No equivalent	N/A	N/A	30-300 Mc/s	Very High Frequencies	V.H/F
No equivalent	N/A	N/A	300-3000 Mc/s	Ultra High Frequencies	U.H/F
Above 30000 kc/s	Very High Frequencies	V.H/F	3000-30000 Mc/s	Hyper High Frequencies	H.H/F

Note that the RN called a frequency band an IF, whilst in our day, an IF was a fixed frequency inside a superhet receiver. Note also that the RN went from 10 MHz (10 Mc/s) to 30 MHz and above with no provision to operate in the frequency band 10MHz to 30MHz. What today we call the SHF band they called H.H/F (High High Frequency).