Radio / Antenna Selector

Switch between 2 radios and 2 antennas





ES-1ASP, User Manual, Power cable (ES-1A shown)

  • Use this device to easily switch the amplifier input between two radios.
  • One radio can be switched between two amplifier inputs
  • Switch the amplifier output between two antennas, by front panel switches.
  • Remove the coax cable clutter
  • Use the optional Remote Control to further tidy up your cables: place the Radio / Antenna Selector behind your amplifier and use the remote control, with no need to access the Selector front panel.
  • To see more images, click on the PICTURES tab

ES-1ASP uses a vacuum relay for antenna switching and it can handle 5000 W output power (6000 W peak).

Remote Head (Optional):

ES-1A and ES-1ASP have toggle switches and LED indicators on the front panel.

They can be used without a remote control.

The remote head provides identical switches and indicators in a small enclosure which can be kept near the radio or amplifier, while the main unit is at the back, with all the heavy cables.

About 50% of the customers are getting the remote control together with their ES-1A / ES-1ASP.

It can be ordered at a later time, but there are additional shipping costs.



Typical use: ES-1ASP Wiring

ES-1ASP Specifications

  • Input power: 200 W maximum , 50 Ω load, non-switching
  • Unused input: grounded
  • Output power: 5000 W continuous, 6000 W peak, 50 Ω load, non-switching
  • SWR: Better than 1:1.05, 1 MHz to 30 MHz, Input (Radio) and Output (Antenna)
  • Power requirements: 12 Vdc, 11 to 15 V range, up to 250 mA current
  • Protection: changing input or output is inhibited when transmitting – PTT is low (<1 V)
  • PTT1 and PTT2 RCA sockets output a weak voltage of about +3.6 V. When pulled low, the current is <1 mA
  • Provision for optional ALC connections
  • Designed and manufactured in Australia


PTT must be connected for this protection to work

The LED’s are following the switch position even with PTT low

(only the relays are inhibited, not the LED’s)

  • Dimensions: 196 x 140 x 85 mm (approx. 7.7” x 5.5” x 3.3”)
  • Weight: 0.67 kg (1.5 lb)
  • Remote head available, connected to the main unit by cable (1.2 m long, other length – please specify); Remote dimensions: 80 x 54 x 28 mm (approx. 3.2” x 2.1” x 3.3”)
  • 196 x 140 x 85 mm (approx. 7.7” x 5.5” x 3.3”)
  • 0.67 kg (1.5 lb)

PRICES (in Australian Dollars):

ES-1ASP: AU$365 Including shipping to VK

Remote control: AU$32


Shipping weight: 0.95 kg (2 lb)

 Please inquire for stock and shipping cost or any technical details

(To order, go to CONTACT US in the Main Menu)

To USA: (US Dollars)

$319 Shipped: ES-1ASP (vacuum relay)

$339 Shipped: ES-1ASP with Remote