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Difference between revisions of "WK20 - 20W Power Amplifier"

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[[Image:WK20.PNG|thumb|400px]]
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[[Image:1000614100.PNG|thumb|300px|WK20- 20 watt amplifier]]
  
The [[WK20 - 20W Power Amplifier|amplifier 1000614100]] is very designed to amplify the audio of a Stentofon station. The amplifier can be used standalone (speaker only), or it can be used in combination with a station to amplify the speaker signal. It can be used both with IP stations and with analog stations.
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==Highlights==
  
==Features==
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*Designed to amplify the audio of an ASLT subscriber line
* Output for 1 amplified loudspeaker
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*Can be used standalone (speaker only), or in combination with a station to amplify the speaker signal
* Output level control
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*Connects directly to the ASLT subscriber line
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*Provides 20 Watt into 4 Ohm, 12 Watt into 8 Ohm, or 6 Watt into 20 Ohm
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*Powered by 24VAC transformer or 24-36VDC power supply
  
==Description==
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==Connectors and Switches==
The board contains a power amplifier, a potentiometer for adjusting the output volume and an input for switching the amplifier on/off. The symetrical input is matched to the output level on the subscriber board in the AlphaCom exchange.
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[[Image:FIG WK20.PNG|left|600px|thumb|''Connectors and switches on Power Amplifier'']]
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The amplifier may be constantly on, or switched on and off by the M-key on the calling station. It is recommended that power to the amplifier board is supplied from a separate class II transformer. <br\> In the AlphaCom exchange, brackets must be mounted on the board, in order to fasten to the mounting rail.
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{{Note| There is no polarity requirement on the power input when using either 24vAC or 24-36vDC. A diode bridge provides for connection of supply in either polarity.}}
  
The potensiometer "Balance" is to balance out hum and noise, and is preset from factory. Further adjustments are normally not neccessary.
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==WK20 and IP Stations==
 
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The amplifier can also be used with IP stations, connecting the line output of the IP station to the input of amplifier. Note that when used with IP stations the output power will be less than specified in the table below, because the input of the amplifier is designed for ASLT line levels (2.2 volt nominal, max 8 volts) and the line level from the IP stations is 0dBm signal (approx. 0.77 volts).
==Connectors and Switches==
 
[[Image:Connectors and Switches.jpg|left|600px|thumb|Figure 13-13: ''Connectors and switches on Power Amplifier'']]
 
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==Technical Specifications==
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==Related articles==
{| border="1"
 
|-
 
!style="background:#ffdead;" width="100pt"|Text
 
!style="background:#ffdead;" width="100pt"|Value
 
|-
 
|Item Number||align=center|1000614100
 
|-
 
|Input signal level||align=center|1 V - 10 V
 
|-
 
|Input impedance||align=center|6kOhm
 
|-
 
|Output power<br\><br\>||align=center|20 W into 4ohm<br\>12 W into 8 ohm<br\>6 W into 20 ohm
 
|-
 
|Frequency range||align=center|140 - 20.000Hz
 
|-
 
|Max. amplification||align=center|10.5 dB
 
|-
 
|Recommended room temperature<br\>||align=center|0'C to +35'C<br\>+32'F to + 95'F
 
|-
 
|Humidity Range<br\>(non-condensing):||align=center|10% - 90% RH<br\>
 
|-
 
|Dimensions W x H x D<br\>||align=center|75mm x 84 mm x 40 mm<br\>2.9" x 3.3" x 1.6"
 
|-
 
|}
 
  
== Related articles ==
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*[[IP Substation - Amplified calling]]
* [[IP Substation - Amplified calling]]
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*[[WK20 - Applications]]
* [[WK20 - Applications]]
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*[http://www.zenitel.com/product/wk20 Additional Documentation on Zenitel.com]
  
[[Category:Hardware]]
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[[Category:Public Address - Analog amplifiers]]
 
[[Category:Additional equipment]]
 
[[Category:Additional equipment]]

Latest revision as of 13:27, 5 July 2022

WK20- 20 watt amplifier

Highlights

  • Designed to amplify the audio of an ASLT subscriber line
  • Can be used standalone (speaker only), or in combination with a station to amplify the speaker signal
  • Connects directly to the ASLT subscriber line
  • Provides 20 Watt into 4 Ohm, 12 Watt into 8 Ohm, or 6 Watt into 20 Ohm
  • Powered by 24VAC transformer or 24-36VDC power supply

Connectors and Switches

Connectors and switches on Power Amplifier


Note icon There is no polarity requirement on the power input when using either 24vAC or 24-36vDC. A diode bridge provides for connection of supply in either polarity.


WK20 and IP Stations

The amplifier can also be used with IP stations, connecting the line output of the IP station to the input of amplifier. Note that when used with IP stations the output power will be less than specified in the table below, because the input of the amplifier is designed for ASLT line levels (2.2 volt nominal, max 8 volts) and the line level from the IP stations is 0dBm signal (approx. 0.77 volts).

Related articles