H: Difference between revisions

From Amateur Radio Wiki
Jump to navigation Jump to search
(index)
 
(added HT voltage)
 
(14 intermediate revisions by 2 users not shown)
Line 1: Line 1:
<table width="750" border="1" cellpadding="6">
{{glossary}}
  <tr>
 
    <td>[[Dictionary of Ham Radio Terms | A]] </td>
==H==
    <td>[[B]]</td>
'''HAAT''' : '''H'''eight '''A'''bove '''A'''verage '''T'''errain.
    <td>[[C]]</td>
 
    <td>[[D]]</td>
'''[[Harmonics | Harmonic]]''' : Integer multiples of the fundamental frequency being generated, harmonics are present if a signal is not perfectly sinusoidal or is undergoing intermodulation distortion. Harmonics located outside the desired band for transmission are normally removed with low-pass filters to avoid interference to other radio services.
    <td>[[E]]</td>
 
    <td>[[F]]</td>
'''Half Duplex''' : The ability for a transceiver to transmit and receive on two different frequencies, but ony one of these at any given time.
    <td>[[G]]</td>
 
    <td>[[H]]</td>
'''Half wave dipole''' : An [[Antennas |antenna]] that is half a wavelength total, fed at the centre.
    <td>[[I]]</td>
 
    <td>[[J]]</td>
'''HASL''' : '''H'''eight '''A'''bove '''S'''ea '''L'''evel. Often used for mountaintop stations such as repeaters and portable operations to describe their elevation. Measured in either feet or metres depending on the country.
    <td>[[K]]</td>
 
    <td>[[L]]</td>
'''hamfest''' : An event at which hams can buy sell and swap equipment. Often held in conjuction with lectures and demonstrations of equipment.
    <td>[[M]]</td>
 
    <td>[[N]]</td>
'''[[Harmonics | Harmonic]]''' : An integer multiple of a [[Frequency_Wavelength_ and Period | frequency]]
    <td>[[O]]</td>
 
    <td>[[P]]</td>
'''Harmonic (of a ham) ''' : Slang term for the child of a ham.
    <td>[[Q]]</td>
 
    <td>[[R]]</td>
'''Hellschreiber''' (Hell) : A digital mode for sending and receiving text using facsimile (fax) technology.
    <td>[[S]]</td>
 
    <td>[[T]]</td>
'''Henry''' :(H)  The unit for [[Inductors |inductance]]
    <td>[[U]]</td>
 
    <td>[[V]]</td>
'''Hertz''' : Hz - The unit of measure for [[Frequency Wavelength and Period |frequency]]. Named after [http://en.wikipedia.org/wiki/Heinrich_Hertz Heinrich Hertz]
    <td>[[W]]</td>
 
    <td>[[X]]</td>
'''[[HF]]''' : '''H'''igh '''F'''requency. Frequencies in the range 3MHz to 30MHz, also known as shortwave.
    <td>[[Y]]</td>
 
    <td>[[Z]]</td>
'''High Pass Filter''' : A [[Filters |filter]] designed to pass high frequency signals.
    <td>[[0 - 9]] </td>
 
  </tr>
'''hi hi''' : The [[Morse code | morse]] equivalent of laughter.
</table>
 
'''Homebrew''' : Home built equipment.
 
'''Horizontal Polarization''' : An [[Antennas |antenna]] which projects a radio signal in which the electric field is parallel to the surface of the earth '''OR''' a radio signal of which the electric field is propagated parallel to the surface of the Earth.
 
'''HT (1)''' : '''H'''andheld '''T'''ransceiver or '''H'''andi'''T'''alkie. Usually refers to transceivers that operate in the [[2 metres | 2m]] and [[70 centimetres | 70cm]] amateur bands; these are self-contained hand-held radios which include an antenna and battery and transmit at low power.
 
'''HT (2)''' : '''H'''igh '''T'''ension Voltage.  Voltages over 500V

Latest revision as of 22:45, 20 December 2010

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 0 - 9

H

HAAT : Height Above Average Terrain.

Harmonic : Integer multiples of the fundamental frequency being generated, harmonics are present if a signal is not perfectly sinusoidal or is undergoing intermodulation distortion. Harmonics located outside the desired band for transmission are normally removed with low-pass filters to avoid interference to other radio services.

Half Duplex : The ability for a transceiver to transmit and receive on two different frequencies, but ony one of these at any given time.

Half wave dipole : An antenna that is half a wavelength total, fed at the centre.

HASL : Height Above Sea Level. Often used for mountaintop stations such as repeaters and portable operations to describe their elevation. Measured in either feet or metres depending on the country.

hamfest : An event at which hams can buy sell and swap equipment. Often held in conjuction with lectures and demonstrations of equipment.

Harmonic : An integer multiple of a frequency

Harmonic (of a ham)  : Slang term for the child of a ham.

Hellschreiber (Hell) : A digital mode for sending and receiving text using facsimile (fax) technology.

Henry :(H) The unit for inductance

Hertz : Hz - The unit of measure for frequency. Named after Heinrich Hertz

HF : High Frequency. Frequencies in the range 3MHz to 30MHz, also known as shortwave.

High Pass Filter : A filter designed to pass high frequency signals.

hi hi : The morse equivalent of laughter.

Homebrew : Home built equipment.

Horizontal Polarization : An antenna which projects a radio signal in which the electric field is parallel to the surface of the earth OR a radio signal of which the electric field is propagated parallel to the surface of the Earth.

HT (1) : Handheld Transceiver or HandiTalkie. Usually refers to transceivers that operate in the 2m and 70cm amateur bands; these are self-contained hand-held radios which include an antenna and battery and transmit at low power.

HT (2) : High Tension Voltage. Voltages over 500V

Retrieved from "http://wiki.hamtools.org/index.php?title=H&oldid=4765"