Image:Recreational Walkie Talkies.jpg
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Recreational walkie-talkies.
From the left: two different models of personal two-way radios by Motorola, purchased in 2002 and 2004. The larger one (c. 2002) is designed to operate on the FRS allocation, while the smaller one (2004) can also operate on the GMRS channels. Antennas are permanently attached (required by FCC regulation for FRS gear). For the most part, gear designed for unlicensed personal use looks fairly similar no matter what country it is made for, though the frequencies covered are usually incompatible across borders.
Third from the left an early 1980's amateur radio radio for the 2 meter band, complete with external speaker-mike, and DTMF keypad for remote repeater control and phone patch operation.
Fourth from the left a dual band amateur radio WT, that can simultaneously receive in both the 2 meter VHF and 70 cm UHF bands. It also has a DTMF keypad.
Fifth, a smaller amateur WT also suitable for both 2 m and 70 cm. Although similar in size to the smaller FRS units, it is much more versatile, has a higher transmit power, and can transmit on any of several hundred frequencies in two Amateur radio bands.
Sixth, a 1960s vintage toy WT operating in the 27 MHz citizens' band; its 900 mm (36 inch) antenna is partly extended. This unit has a superheterodyne receiver, and 10 transistors.
Next to that a mid-1980's toy WT operating at very low power in the 49 MHz band, with a Morse code key and the Morse code printed on the case. This unit has only 4 transistors and no volume control or squelch. In addition, rather than the telescoping antenna common on earlier models, this unit has a rubber duck antenna, which is thought to be more robust and less dangerous to the user if broken, and has replaced telescoping antennas in virtually all children's two-way radio units.
Commercial and emergency services WTs may be similar in size to the amateur WTs shown here, but generally have much better battery life, more rugged construction, and simpler controls, often restricting operation to only one or a few pre-programmed channels. In addition, many have ruggedizing features such as waterproofing (especially for outdoors and marine use) and intrinsically safe design for use in fire-prone industrial environments.
The two walkie-talkies on the right use only discrete transistors; all the more recent WTs shown here use microprocessors and integrated circuits for most of their functions.
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| Date/Time | Dimensions | User | Comment | |
|---|---|---|---|---|
| current | 04:01, 21 April 2005 | 640×480 (105 KB) | Wtshymanski (Talk | contribs) | ({pd} Recreational walkie-talkies. From the left: two different models of FRS radios by Motorola. Third from the left an early 1980's amateur radio radio for the 2 metre band, complete with external speaker-mike, and DTMF keypad for remote) |
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