WK20 - 20W Power Amplifier
From Zenitel Wiki
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 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
<br\><br\><br\><br\><br\><br\><br\><br\><br\><br\><br\><br\><br\><br\><br\><br\><br\><br\><br\><br\><br\><br\><br\><br\><br\><br\><br\><br\>
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" |