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Frequency counter. A frequency counter is an electronic instrument, or component of one, that is used for measuring frequency. Frequency counters usually measure the number of cycles of oscillation or pulses per second in a periodic electronic signal. Such an instrument is sometimes called a cymometer, particularly one of Chinese manufacture ...
Foxhole radio. A foxhole radio is a makeshift radio that was built by soldiers in World War II for entertainment, to listen to local radio stations using amplitude modulation. [1][2] They were first reported at the Battle of Anzio, Italy, spreading later across the European and Pacific theaters. The foxhole radio was a crude crystal radio which ...
A foxhole radio is a simple crystal sets radio receiver cobbled together from whatever parts one could make (which were very few indeed) or scrounged from junked equipment. Such a set typically used salvaged domestic wiring for an antenna, a double-edged safety-razor blade and pencil lead (or bent safety-pin) for a detector, and a tin can ...
A monks bench or hutch table is a piece of furniture where a tabletop is set onto a chest in such a way that when the table was not in use, the top pivots to a vertical position and becomes the back of a Settle, and this configuration allows easy access to the chest lid which forms the seat of the piece. [1][2][3]
Bench (furniture) Classic garden bench. A bench is a long seat on which multiple people may sit at the same time. Benches are typically made of wood, but may also be made of metal, stone, or synthetic materials. Many benches have back rests, while others do not and can be accessed from either side. Arm rests are another common feature.
A laser system on an optical table. An optical table is a vibration control platform that is used to support systems used for laser - and optics -related experiments in science, engineering and manufacturing. The surfaces of these tables are designed to be very rigid with minimum deflection so that the alignment of optical elements remains ...