WK20 - 20W Power Amplifier
From Zenitel Wiki
The amplifier 1000614100 is designed to amplify the audio from an AlphaCom subscriber line. The amplifier can be used standalone (loudspeaker only), or it can be used in combination with a station to amplify the loudspeaker signal.
Contents
Features
- Output for 1 amplified loudspeaker
- Output level control
Description
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 ASLT subscriber board in the AlphaCom exchange.
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.
The potensiometer "Balance" is to balance out hum and noise, and is preset from factory. Further adjustments are normally not neccessary.
Connectors and Switches
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, 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).
Technical Specifications
| Text | Value |
|---|---|
| Item Number | 1000614100 |
| Input signal level | 1 V - 10 V |
| Input impedance | 6kOhm |
| Output power<br\><br\> | 20 W into 4ohm<br\>12 W into 8 ohm<br\>6 W into 20 ohm |
| Frequency range | 140 - 20.000Hz |
| Max. amplification | 10.5 dB |
| Recommended room temperature<br\> | 0'C to +35'C<br\>+32'F to + 95'F |
| Humidity Range<br\>(non-condensing): | 10% - 90% RH<br\> |
| Dimensions W x H x D<br\> | 75mm x 84 mm x 40 mm<br\>2.9" x 3.3" x 1.6" |