Electronics (Mike Jaroch)
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HEATERSame as a FILAMENT [6]. | ||
HEIGHT-FINDING RADARA radar that provides target altitude, range, and bearing data [18]. | ||
HELIX HOUSEA building at a transmitter site that contains antenna loading, coupling, and tuning circuits [17]. | ||
HENRYThe electromagnetic unit of inductance or mutual inductance. The inductance of a circuit is 1 henry when a current variation of 1 ampere per second induces 1 volt. In electronics, smaller units are used, such as the millihenry (mH), which is one-thousandth of a henry (H), and the microhenry (μH) which is one-millionth of a henry [2]. | ||
HERTZA unit of frequency equal to one cycle per second [2]. | ||
HERTZ ANTENNAA half-wave antenna that is installed some distance above ground and positioned either vertically or horizontally [10]. | ||
HETERODYNE DETECTIONThe use of an a.f. voltage to distinguish between available signals. The incoming cw signal is mixed with locally generated oscillations to give an a.f. output [12]. | ||
HETERODYNING(1) The process of mixing two frequencies across a nonlinear impedance [12]. (2) The process of mixing the incoming signal with the local oscillator frequency. This produces the two fundamentals and the sum and difference frequencies [17]. | ||
HEXADECIMALSame as SEXADECIMAL. A number system with a base of sixteen; also pertains to conditions, choices, or selections that have sixteen possible values or states [13]. | ||