product description
The Bias-T incl. Sequencer, DCW 2004 B, allows a comfortable remote coupling of our
MHP - R and SUPER - AMP preamplifiers via the coaxial cable as well as for delayed
switching of HF-linear amplifiers.
The sequential operation of the DCW 2004 B avoids reliably damage to the preamlifier
that may be caused by HF-spikes during switching. It offers 3 switching outputs in total,
which have ascending delay times. So not only linear amplifiers but other devices, like
transverters, can be switched on with defined times.
The DCW 2004 B is designed for the amplifiers MHP - R and SP series. The PTT switching
input of the DCW 2004 B accepts a circuit against ground or against + 5 ... 12 V.
The preamlifier and a linear amplifier (if used) can be switched on or off as required.
The HF-section of the DCW 2004 B offers a very low inseration loss and a high shielding
factor.
| Technical Data* | DCW 2004 B 6m, 2m, 70cm 23cm | DCW 2004 B SHF 13cm, 23cm |
| Transmissible power | 6 m / 1,0 kW CW / 2,0 kW PEP 2 m / 1,0 kW CW / 2,0 kW PEP 70 cm / 0,6kW CW / 1,2 kW PEP 23 cm / 0,3kW CW / 0,6 kW PEP |
23cm = 150 W 13cm = 100 W |
|
Insertion loss
|
0,1 dB
|
0,2 dB |
|
Connection norm
|
N-Socket
|
|
|
Preamplifier voltage
(remote feeding) |
0,5 A max loadable
|
|
|
PTT switching output
power amplifier |
30 V at 0,5 A max.
|
|
|
Relay switching outputs
|
30 V at 0,5 A max.
|
|
|
-PTT Input
|
switches at
|
|
|
+PTT Input
|
switches at >5 V
|
|
|
Operating voltage
|
12-14 V
|
|
|
Recommended voltage
|
13,8 V
|
|
|
Dimensions
|
40x120x654 mm
|
|
|
Weight
|
600 g
|
*only applicable to equipment in 2015
The PTT control of the transceiver must take place in analogue operating modes (SSB, CW FM) from connection 6 of the DCW 2004 B sequencer. You must then control the PTT with a foot switch. Or you have to cut the PTT line on the microphone. When using the WSJT-X program, the PTT output socket of the transceiver must be connected to connection 3 of the DCW 2004 B sequencer. Set the TX delay to 0.5 sec in the program under Settings → Advanced!
The following diagrams show how to connect the DCW 2004 B:
For CW/SSB/FM:
For WSJT-X:
