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2. AN/PRC-77 Portable Transceiver - Wikipedia

   en.wikipedia.org/wiki/AN/PRC-77_Portable_Transceiver

   The AN/PRC-77 entered service in 1968 during the Vietnam War as an upgrade to the earlier AN/PRC-25.It differs from its predecessor mainly in that the PRC-77's final power amplifier stage is made with a transistor, eliminating the only vacuum tube in the PRC-25, as well as the DC-DC voltage converter used to create the high plate voltage for the tube from the 15 V battery.

3. AN/PRC-150 - Wikipedia

   en.wikipedia.org/wiki/AN/PRC-150

   The AN/PRC-150(C) Falcon II Manpack Radio, is a tactical HF-SSB/ VHF-FM manpack radio manufactured by Harris Corporation. [1] It holds an NSA certification for Type 1 encryption . [ 2 ] The PRC-150 is the manpack HF radio for the Harris Falcon II family of radios, introduced in the early 2000s.

4. AN/PRC-152 - Wikipedia

   en.wikipedia.org/wiki/AN/PRC-152

   The AN/PRC-152 Multiband Handheld Radio, is a portable, compact, tactical software-defined combat-net radio manufactured by Harris Corporation. [1] It is compliant without waivers to the Joint Tactical Radio System (JTRS) Software Communications Architecture (SCA). [2] [3] It has received NSA certification for the transmission of Top Secret data.

5. Antenna (radio) - Wikipedia

   en.wikipedia.org/wiki/Antenna_(radio)

   An example of a low-gain antenna is the whip antenna found on portable radios and cordless phones. Antenna gain should not be confused with amplifier gain, a separate parameter measuring the increase in signal power due to an amplifying device placed at the front-end of the system, such as a low-noise amplifier.

6. Walkie-talkie - Wikipedia

   en.wikipedia.org/wiki/Walkie-talkie

   A walkie-talkie, more formally known as a handheld transceiver (HT) or handheld radio, is a hand-held, portable, two-way radio transceiver. Its development during the Second World War has been variously credited to Donald Hings , radio engineer Alfred J. Gross , Henryk Magnuski and engineering teams at Motorola .

7. Transistor radio - Wikipedia

   en.wikipedia.org/wiki/Transistor_radio

   A classic Emerson transistor radio, circa 1958. A transistor radio is a small portable radio receiver that uses transistor-based circuitry.Previous portable radios used vacuum tubes, which were bulky, fragile, had a limited lifetime, consumed excessive power and required large heavy batteries.