Search results
Results from the WOW.Com Content Network
The Baofeng UV-5R is a hand-held radio that has been marketed in the United States [6] and was produced since 2012. [7] It has been used in a number of projects involving radios. [ 8 ] [ 9 ] It is described as a popular inexpensive model.
Sinclair's final 1960s radio kit was the 1967 "Micromatic", billed as "the world's smallest radio" like Sinclair's earlier radios. The "Micromatic" was a reasonable success and was sold until 1971. In May 1971 Sinclair Radionics made £85,000 profit on £563,000 turnover; the following year profit increased to £97,000 on turnover of £761,000.
A wooden tripod holding an optical level is set up firmly on the ground. Levelling or leveling (American English; see spelling differences) is a branch of surveying, the object of which is to establish or verify or measure the height of specified points relative to a datum.
The PRC-163 is one of the Handheld, Manpack & Small Form Fit (HMS) components [3] of the Integrated Tactical Network family of radios, [1] the U.S. Army's modernization strategy for tactical radios. It is a member of L3Harris' Falcon IV family of tactical radios, and the successor to the Falcon III-family AN/PRC-152 Multiband Handheld Radio .
The device consists of two triangular metal plates connected at their corners by leveling thumbscrews, a bubble level, a locking mechanism and often an optical plummet. The centre of the bottom plate of the tribrach has a 5/8-11 UNC thread bolt hole which is used to attach the tribrach to the tripod. The top plate has three small holes or slots ...
The world's first hand-held and transistorized sound level meter, was released in 1960 and developed by the Danish company Brüel & Kjær. [5] In 1969, a group of University researchers from California founded Pulsar Instruments Inc. which became the first company to display sound exposure times on the scale of a sound level meter, as well as ...
The National Radio Institute (NRI) established the Conar Instruments division in the fall of 1961 and announced it in their bimonthly publication, The NRI News. [1] Conar was an expansion of the National Radio Institute 's student supply division that functioned primarily to supply test equipment to their students and graduates.
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.