ES-4 Radio / Antenna Selector Switch between 3 radios and 5 antennas

ES-4 COMES AS A CONTROL UNIT AND A BASE (SWITCHING) UNIT

THE BASE UNIT RECEIVES 12V POWER AND HAS ALL THE HEAVY COAXIAL CABLES CONNECTED TO IT. THERE IS ALSO PROVISION FOR CONNECTING UP TO 3 PTT AND UP TO 3 ALC CABLES (OPTIONAL, IF USED OR NEEDED). TYPICALLY THE BASE UNIT IS INSTALLED BEHIND THE AMPLIFIER, POSSIBLY ON A WALL OR WOODEN PANEL (MOUNTING BRACKET SUPPLIED).

THE CONTROL UNIT IS CONNECTED TO THE BASE VIA A FLAT CABLE. IT HAS AN OPTIONAL PTT CONNECTION. THE CONTROL UNIT IS TYPICALLY PLACED IN FRONT OF THE OPERATOR, NEAR THE RADIO.

SELECT the radio or the antenna at the press of a button

Specifications

Input power (3 inputs): 200 W maximum , 50 Ω load, non-switching
The non-active inputs: grounded
Output power (5 outputs): 2000 W, 3000 W peak, 50 Ω load, non-switching
Feedback Output to Input: about -115dB@30MHz
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: “Hot Switching” – changing input or output is inhibited if PTT is low (<1 V)
The PTT (RCA) sockets output a weak voltage of +5 V. When pulled low, the current is about 8 mA.
ALC negative signal sent to the 3 radios via back to back diodes (if connected)

NOTE:

PTT must be connected for the Hot Switching protection to work

Dimensions (overall):

Base: 240 x 125 x 58 mm (without wall mounting bracket

(9.5” x 5” x 2.3”)

Base: 240 x 166 x 58 mm (including the wall mounting bracket)

(9.5” x 6.5” x 2.3”)

Controller: 168 x 68 x 26 mm

(6.6” x 2.7” x 1”)

Weight: 1.4 kg (3 lb)
Shipping Weight: <2 kg (4.4 lb)

PRICES (in Australian Dollars):

ES-4: AU$390

SHIPPING WORLD WIDE

Shipping weight: <2 kg (4.4 lb)

Please inquire for stock and shipping cost or any technical details

(Go to CONTACT US in the Main Menu)

To USA (US Dollars):

$349: ES-4 Shipped

Review

Flex-6400M and Flex-6600M Preview from the Dayton Hamvention 2017 [ VIDEO ]

May 22, 2017 No comments

Flex-6400M and Flex-6600M Read more

New Elecraft Gear – Interview

November 22, 2018 No comments

Elecraft “Fiori Films Presents Ham Radio TV: New Elecraft Gear @ Pacificon 2018. In this video Kevin N6VLF, interviews Eric / WA6HHQ... Read more

Measures The Loss In Coax Connectors and 100 Feet of RG8X by W6LG

January 20, 2018 No comments

Jim W6LG uses a signal generator and a panadapter to measure the loss in 30 coax connectors at 14 and 52 mhz down to a fraction of a db. You might be... Read more

How To Solder — Part 1and 2 by W6LG

December 26, 2017 No comments

This is Part 1 of 3 videos about ‘How to Solder’. In this episode, Jim W6LG shows the tools that he uses when soldering. Soldering is part... Read more

Test Equipment Basics – Ham Nation 389

February 14, 2019 No comments

Relief efforts in Cuba, testing equipment, aurora updates. Coordinating emergency communications in Cuba, Dr. Skov with solar weather and an aurora up... Read more

VHF

TH-D74 – Kenwood – APRS & D-STAR

August 08, 2016 No comments

TH-D74 The long-awaited “APRS” & “D-STAR”. To the dictates of the sensibility, to a new investment style. PRS communicati... Read more

Icom’s RMS-Net Radio Management System Explained

July 09, 2015 No comments

Icom UK are pleased to provide this introduction to its RMS-Net Radio Management System which integrates desktop PCs, Icom hand portables, base statio... Read more

Retevis RT98, the mini mobile radio show

August 23, 2019 No comments

Two Repeaters One Antenna Feed Line

June 21, 2017 No comments

“We had an opportunity recently to provide a unique duplexer system. The customer needed a single antenna feed line for two repeaters. This solu... Read more

BCH-270 Handheld Radio VHF and UHF

July 24, 2017 No comments

“BridgeCom Systems, Inc is pleased to announce the availability of BCH-270 Handheld Radio for the amateur radio market. The new BCH-270 Handheld... Read more

Antenna

Antenna Polarization [ ARRL PODCAST ]

July 18, 2019 No comments

Your antenna’s polarization can make a big difference in how well you can hear, and be heard — especially on VHF and up. Read more

DX Engineering Skylark Dual-Band Yagi Antenna DXE-2X7

April 09, 2015 No comments

Antenna, Beam, Skylark, Duoband Yagi, 17 and 12 meters, 90 mph Wind Rating, 16 ft. Boom Length, Each HF Beam Antenna Type:Yagi HF Beam Antenn... Read more