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.

Specifications:

Frequency Range 1 to 54 MHz
Insertion Loss 1 to 30 MHz : 0.13 dB Max.
30 to 54 Mhz: 0.18 dB Max.
Add. SWR 1 to 30 MHz : 1.05 Max.
30 to 54 MHz : 1.17 Max.
Power 1 to 30 MHz : 2000 W CW and SSB, 1500 W RTTY *
30 to 54 MHz : 1000 W CW and SSB, 800 W RTTY *
Coax Cable, Max R
Lightning Protection 600 V Gas Discharge Tubes, 5,000A Max at 10 uS
AC Supply: 110 to 240 V AC, 50/60Hz (Adaptor supplied.)
Power Consumption:
Operating Temperature: Remote Unit -30 to +45 degrees C°. ; Control Unit 0 to +35 degrees C°. Non Condensing.
Weight, Outdoor Unit 980 g.
Control Unit 800 g.
Dimensions, Outdoor Unit: 200x150x90mm
Control Unit: 200x60x170mm

Notes: * Switch position should NOT be changed while transmitting. Ensure that the correct antenna port is selected before applying power!

GB-SW3 & GB-SW5 models

Matching high power remote antenna switch for your garden beam. The new system: NO need for control cable: Coax carries both RF and control signals.

GB SW-3: Three Port remote switch. GB SW-5: Five port switch.
Frequency range: 1.5 to 54 MHz.
2 kW on 1.8 to 30 MHz, 1 kW on 54 MHz, key down cw signal.
Easy to use. Rugged. Suitable for DXpeditions.
Operates over 500 m (1500 feet) of RG-8 coax. Usable on 150m (450 feet) of RG-58 coaxial cable,
The remote unit is UV and water resistant.
Main adapter accepts 110 to 240V AC, 50-60Hz. (for 24 V DC)
Max DC current: 150mA.