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Vintage D-104 microphone head. Introduced in 1933, the Astatic model D-104 became known for its high frequency response that contributed to better communications audio quality. Early D-104 mikes used a 1" thick case, a large ID tag, and holes for "ring & spring" mounts. The design was modified in April 1937 with smaller tags and reduced thickness.
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Amateur radio operator's "Radio shack" with vintage gearVintage amateur radio is a subset of amateur radio hobby where enthusiasts collect, restore, preserve, build, and operate amateur radio equipment from bygone years, such as those using vacuum tube technology.
D104, D. 104, or D-104 may refer to: D104 road, a road in Croatia; D-104 microphone, a microphone commonly used in broadcasting;
Later, fixed bias became a staple of Soviet and Russian Williamson-like designs that employed exotic output valves like the 6C4C directly-heated triode, [102] the GU-50 generator pentode [103] [104] or the 6P45S horizontal deflection tetrode. [104] Throughout the 1950s, as prices of capacitors decreased, designers steadily increased their values.
The Aural Exciter circuit is now licensed by several manufacturers. The so-called Big Bottom circuit was added in 1992. Later revisions of the Aphex Aural Exciter included the Model 104 Type C and Type C2 units. The most recent version is the Model EXCITER Aural Exciter and Optical Big Bottom.
A function analysis diagram (FAD) is a method used in engineering design to model and visualize the functions and interactions between components of a system or product. It represents the functional relationships through a diagram consisting of blocks, which represent physical components, and labeled relations/arrows between them, which represent useful or harmful functional interactions.
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