Remote controlled antenna switches (coaxial)

Remote antenna switch w/o DC feed



Low-loss mast-mounted antenna switch for switching 2 or 4 antennas to one feedline, or for changing the polarisation (horizontal/vertical) of X-quad antennas and crossed yagis. Low in-line attenuation, see table. 12 V DC operation (100mA max). For 2x switches one control wire is sufficient (use maybe an unused wire of the rotor control cable?) but the DC minus pole must be connected to the coax cable shield. Impedance 50 Ω, N connectors (female), supplied complete with mast clamp up to 54 mm mast diameter.
The remote control connector on the AS-304 is a 4 pin DIN socket, a suitable plug is included with the switch.

Type AS-304 AS-3000
No. of antennas 4 2
Frequency range 0-600 0-3000 MHz
Insertion loss HF 0,05 0,05 dB
70cm 0,15 0,02 dB
3000 MHz - 0,1 dB
Max. Power (PEP) HF 1500 1000 Watt
2m 1000 1000 Watt
70cm 600 800 Watt
23cm - 500 Watt
13cm - 250 Watt
Order No. 18077 179.00 € Buy now 18079 219.00 € Buy now



ACS-2004 4-way remote antenna switch



The ACS-2004 allows connection of four antennas for all amateur bands from 80m to 70cm, switched to just one coaxial cable. Included is the control unit AC-2004 and the weatherproof outdoor unit AS-2004. Both devices communicate over one cable, also allowing to select independently 4 separate pre-amps.

Additionally the ACS-2004 switching systems contains a sequencer for controlling pre-amp and power amp keying.

If pre amps are to be used they are integrated between the antenna and the input of the switch.

To protect the switching contacts of the HF relays and the pre-amps, antenna selection is bloccked while the PTT is engaged.


ACS-2004 Bedienteil
  • Technical Data ACS-2004
  • Frequency range 3MHz to 440MHz
  • Max. power load (PEP)
    • 1500 Watt 80m...10m
    • 800 Watt 6m + 2m
    • 600 Watt 70cm
  • Insertion loss
    • 80m ... 10m <0,1 dB
    • 6m ≈ 0.15 dB
    • 2m ≈ 0.25 dB
    • 70cm ≈ 0.3 dB
  • Antenna inputs: 4
  • Max supply for pre-amps: 12V @ 0.5A
  • PTT keying load for PA max. 0.8A / 30V; Open Collector
  • Solenoid output loads max. 0.8A / 30V; Open Collector
  • PTT input < 2V or > 5V
  • Supply voltage 12 ... 15V, recommended 13,8 ... 14,5V
  • All connectors N female
  • Max mast diameter 54mm
Order No.
18075 ACS-2004 Available again from end of september 2016 on 279.00 € Buy now
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