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70 centimeters is very close to the third harmonic of 2 meters, which allows sufficiently broadband 2–meter antennas to be used for 70 centimeters. Antennas specifically designed to work on both bands are common. Also, 2 meters is far enough away from 70 centimeters to make diplexers small and simple, making it easy to cross-band repeat ...
The mode requires moderately high power (more than 500 watts) and a fairly large, high-gain antenna because round-trip path loss is on the order of 270 dB for 70 cm signals. Return signals are weak and distorted because of the relative velocities of the transmitting station, Moon and the receiving station.
Repeaters are found mainly in the VHF 6-meter (50–54 MHz), 2-meter (144–148 MHz), 1.25-meter band (1 1 ⁄ 4 meters) (220–225 MHz) and the UHF 70 centimeter (420–450 MHz) bands, but can be used on almost any frequency pair above 28 MHz. In some areas, 33 centimeters (902–928 MHz) and 23 centimeters (1.24–1.3 GHz) are also used for ...
The 2-meter amateur radio band is a portion of the VHF radio spectrum that comprises frequencies stretching from 144 MHz to 148 MHz [1] in International Telecommunication Union region (ITU) Regions 2 (North and South America plus Hawaii) and 3 (Asia and Oceania) [2] [3] and from 144 MHz to 146 MHz in ITU Region 1 (Europe, Africa, and Russia).
144–148 MHz: Amateur radio 2-meter band; 148–150 MHz: Land mobile, fixed, satellite; 150–156 MHz: "VHF business band", public safety, the unlicensed Multi-Use Radio Service (MURS), and other 2-way land mobile, FM; 156–158 MHz VHF Marine Radio. 156.8 MHz (Channel 16) is the maritime emergency and contact frequency. 159.81-161.565 MHz ...
FM transmit on 2 Meters and 70 centimeters at up to 3 watts on 2 m and 2 watts on 70 cm with a 6VDC external source (1.5 watts on 2 m and 1 watt on 70 cm when using the internal battery) 1000 mAh lithium-ion battery; Internal ferrite bar antenna for AM broadcast reception; Stereo decoding for FM Broadcast reception; Stereo headphone connector