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
Short video showing how I receive an email sent from gmail over my Ham radio. Read more
“In the fall of 2016 I saw my first rocket launch and little did I know that the satellite on that rocket would come to shape and fill my though... Read more
This is the part 1 video of the DV4home, showing the basic setup and menu navigation. Read more
“Two Chinese companies, Radioddity and Baofeng, have teamed up to bring you the US$75 dual-band FM/DMR radio housed in the old UV-5R package. Th... Read more
Measuring Coax Impedance New ARRL 2019 calendar, Drok LM2596 voltage regulator, winterize your equipment. The new ARRL 2019 calendar is here, Amateur... Read more
Review
Receiving a Gmail email over HF radio with Winlink system
How to Receive Beautiful Images of the Earth Directly From Space | GOES-15,16,17 and Himawari 8 HRIT
DV4home – Basic setup and menu navigation
Review and Tutorial on Radioddity/Baofeng RD-5R DMR Dualbander
Measuring Coax Impedance – Ham Nation 378
Yaesu FT-2D Read more
Dynascan P-72 Double band 20W equipment, with a very small size. Double simultaneous reception. Microphone connection or micro-speaker on the side. ... Read more
“A DMR radio isn’t any good if it doesn’t have any frequencies or channels programmed into it. Programming your first DMR radio might feel a lit... Read more
YANTON DM-980 Built for dual-mode (Digital+ Analog) 1000Channels Versatile Voice Call (Private call,group call, all call and emergency call) Digital e... Read more
OSCAR-100 This spectrum monitor, hosted at Goonhilly Earth Station in Cornwall, shows the Qatar OSCAR-100 wideband transponder onboard the Es’ha... Read more
VHF
The first video from Yaesu FT-2D
Dynascan P-72
How to Build your own DMR Digital Radio Code Plug – Ham Radio Q&A
YANTON DM-980
Qatar OSCAR-100 Wideband Spectrum Monitor
This multiband vertical designs provide 9 band coverage encompassing the 6, 10, 12, 15, 17, 20, 30, 40 and 80 meter bands. Cushcraft achieved a majo... Read more
Edmund M0MNG gives a ‘first impressions’ unscripted review of a new product. The WSPRlite is available from SOTAbeams and is proving very... Read more
The radio amateurs have known for a long time that PV installations (solar panels) could interfere. For more than 10 years, the VERON has been warning... Read more
“So many people asked which antenna would I rather have and which one performs better. Well, this is a basic comparison on a day not so g... Read more
Ranko 4O3A has taken antenna switches into the 21st century! Antenna Genius 8×2 is the first in a new antenna switch line from 4O3A Signature sit... Read more
Antenna
Cushcraft R9 covers 6,10,12,15,17,20,30,40,80 Meters
WSPRLite first impressions – Antenna Performance Analysis System
Radio interference from Solar Panels – RFI
MFJ 8-Band Cobweb VS Hy-Gain AV680 Comparison
4O3A ANTENNA GENIUS 8X2 | SO2R ANTENNA SWITCH WITH TCP/IP
![Introducing the new SunSDR2 DX transceiver [ VIDEO ] Friesrichshafen](https://qrznow.com/wp-content/uploads/2019/06/SUNSDR-1-90x60.jpg)
![Introducing the new SunSDR2 DX transceiver [ VIDEO ] Friesrichshafen](https://qrznow.com/wp-content/uploads/2019/06/SUNSDR-1-180x120.jpg)
