# Electronics (Mike Jaroch)

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Browse the glossary using this index

Special | A | B | C | D | E | F | G |

**H**| I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | ALL

## H |
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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]. | ||