Blog Inquiry Contact

DCW 2004 B Sequencer 6m 2m 70cm 23cm

Product.Nr.: 1025

EUR 303,45
incl. 19 % VAT

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
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
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
40x120x654 mm
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: