GB Remote Antenna Switch Via Coax.

The new system: without supplement command cable!

  • GB SW-3 and GB SW-5  /3 and 5 antenna port/ for 1-54 MHz.
  • Tested wih more than maximal legal power (on 1-30MHz 2kW, on 6m 1kW) continued cw signal.
  • Simple using everywhere.  
  • Usable with 100m ~300 feet RG-58 coaxial cable,
  • or much more cable lenght with a better quality coax.
  • The outside box is UV and water resistant.
  • The low voltage DC power supply working: 110-240V~ 50-60Hz.
  • Max DC current: 150mA.

Description: GB-SW3 & GB-SW5 Remote Antenna Switch

  • GB-SW3 and GB-SW5 Remote Antenna Switches allow the convenient feeding of multiple antennas via a single coaxial cable. Control voltages are carried over the coax cable, eliminating the need for a separate control cable. The switches can carry full legal power (1500 W from 1.5 to 30 MHz, and 1000 W at 54 MHz) and were designed to provide reliable operation over extended periods of time.
  • Built-in Gas Discharge Surge Arresters provide lightning protection. The GB-SW3/5 overcomes the RX signal degradation that occurs over time with cheaper switches, where high power relays are used to switch very low level signals. 
  • This is mainly caused by the build-up of oxide and contaminants on the relay contacts, which, break down and disappear at high power, but can cause noisy and intermittent reception.
  • To prevent this, the GB-SW3/5 adds a DC "wetting current" that is fed through the relay contacts, which, in conjunction with the sealed and self-wiping contacts of the relays, will ensure reliable and noise-free RX operation for many years. The GB-SW3/5 consists of two units: the Remote Unit, which is generally installed on a tower or at the base of vertical antennas, and the Control Unit, which is installed at the operating position.
  • The Remote Unit is water and UV resistant and is designed for outdoor use.
  • Control voltages from the Control Unit are carried to the Remote Unit via the antenna coax cable.
  • The maximum length of usable coax depends on the DC resistance of the cable.
  • Generally, larger diameter cables have lower resistance, but note that some cables use copper plated aluminum or steel inner conductors, which, while perfect at HF, can have higher DC resistance.
  • Consult your cable specifications for DC resistance.
  • For a guide, operation will be reliable via 300 meters (1000 feet) of RG-8 type coax. In most cases, however, coax RF losses will become prohibitively high long before the operation of the switch will be effected.


  • Frequences : 1 à 54 MHz
  • Perte d'insertion : 1 à 30 MHz : 0.13 dB Maximum
  • 30 à 54 Mhz: 0.18 dB Maximum
  • Add. SWR 1 à 30 MHz : 1.05 Max.
  • 30 à 54 MHz : 1.17 Max.
  • Puissance 1 à 30 MHz : 2000 W CW and SSB, 1500 W RTTY *
  • 30 à 54 MHz : 1000 W CW and SSB, 800 W RTTY *
  • Coax Cable, Max R
  • Protection contre la foudre : Tubes à décharge de gaz 600V, 5,000A Max à 10 uS
  • Alimentation secteur: 110 à 240 Volts AC, 50/60Hz (Adaptateur fourni.)
  • Températures d'utilisation : le commutateur de -30 à +45 degrés C°. ; boitier de commande de 0 à +35 degrés C°. ( pas de condensation )
  • Poids , Boitier extérieur 980 gr.
  • Boitier de contrôle 800 gr.
  • Dimensions, Boitier extérieur: 200x150x90mm
  • Boitier de contrôle: 200x60x170mm

Nota: *La position de boitier de contrôle ne doit pas être changée durant l'émission. Vérifier que vous êtes sur la bonne position d'antenne avant de transmettre !

modells: GB-SW3 & GB-SW5

Commutateur d'antennes grande puissance. Nouveau systeme: Ne nécessite pas de cable de contrôle: le cable coaxial sert à la commutation des lignes et à la HF.

  • GB SW-3: Trois lignes coaxiales. GB SW-5: 5 lignes coaxiales
  • Fréquences : 1.5 to 54 MHz.
  • 2 kW de 1.8 à 30 MHz, 1 kW sur 54 MHz, ( en CW ).
  • Mise en œuvre simple. Robuste. Approprié pour les DXpeditions.
  • Fonctionne jusqu'à 500 m avec du câble coaxial RG-8, 150m avec du câble RG-58
  • Le boitier extérieur est anti-UV et étanche
  • L'alimentation du boitier de commande se fait en 110 ou 240V AC, 50-60Hz. (délivre 24 V DC)
  • Courant maximum dans le cable coaxial: 150mA.