K9AY/4-way Bi-dir beverage antenna controller/ remote input

K9AY/4-way beverage RX antenna CONTROLLER - classic/remote

This is universal controller for 4 directional RX antenna. You can control directions of antenna by DC voltage or you can use internal Bias Tee and apply AC/DC voltage to RX antenna coax. Jumpers inside allow you to set right voltage combinations. There are front end protections, HPF for AC noise blocking, three Band Pass Filters, Preamplifier and RX way switch. Thanks to this switch, you can use RX antennas with any TRX - you do not need RX ANT IN connector at your TRX. Rload knob changes DC voltage from about 6 to 1,5V and you can use it with K9AY feeder and change loop termination resistance. Version REMOTE has got also possibility to control these features by the external controller.

Main functions:

Controller

Universal box for K9AY or 4-way Bi-Dir beverage system Front panel
4-way beverage system can have 4 construction positions in the field Manual
Four direction switch
Including Bias tee AC/DC for RX antenna
HPF > 100 kHz as AC noise eliminator (80 dB at 20 kHz)
Front End protections
RF power limiters in RX line
LED direction indicator 0 or 45 deg. Picture
Three BPFs and Bypass - 4 positions switch on the front panel.
Internal PCB with BPFs and preamp
RX SOURCE switch. Selecting TX or RX antenna for receiving. More: Picture and Manual
Preamplifier switch and LED indicator.
POWER SUPPLY MUST BE 12V AC not DC. Like this one
SMD + THT construction
REMOTE version - LED Indicator LOCAL / REMOTE Picture

Controller Block diagram CLASSIC / REMOTE version:

Parameters:

Power supply 12-14 V AC!!! min. 1,5 A With DC power supply you will not be able to switch directions over the coax line.
Preamplifier with 1W NPN transistor 2SC5551A
Preamp BIAS current 10 to 70 mA
Gain: up to 18 dB
Noise Figure (NF) < 2 dB
REAL OIP3 34 dBm
Input HPF > 100kHz (AC limiter)
BPF insertion loss lower than 1dB
Bias tee AC/DC max. 350 mA (for 4-way beverage system)
HPF > 100 kHz as AC noise eliminator (80 dB at 20 kHz)
TX power from TRX to TX antenna port up to 400 W
PTT IN/OUT - only loop, no delay, TX to GND
PTT logic is 5 V compatible (OM-power)

Example for controller with 4-way beverage system and simply K9AY loop antenna:

Controller comparison CLASSIC / REMOTE version:

Controller comparison for K9AY++ and 4-way system - THIS PAGE IS ABOUT THE LEFT one:

REMOTE CONTROL version:

There is NO IP/web based remote control inside the box. RJ45 connector is only for DC voltage between controller and feeder. Remote Control can be done by the DB15M connector at the rear panel. When you apply +12 to 14 V DC to direction pin at this connector, relay automaticly deactivate front panel switches and you can control it over these external voltages at DB15M Remote Control connector. All LED indicators still work. More at Manual web page.
CONTROLLERS: REMOTIUS 64 or OLI IP 12

Technical articles:

Introduction of our remote controlers At Technical Blog
Remote K9AY++, 4-WAY beverage system and 7ANT At Technical Blog

Example of the Remote Control with external IP relays:

REMOTE CONTROL directly compatible with OL IP 12:

REMOTE CONTROL directly compatible with REMOTIUS 64:

One cable needed:

Band Pass Filters characteristic:

160m BPF

80m BPF

40m BPF

Band Pass Filters characteristic with preamplifier:

Download

Controller
Manual page for versions:	< 2022	> 2022
Front Panel board rev. 1.2 RC	sch	pcb	pcb
Controller connector board rev. 3.2	sch	pcb	260
RX/TX switch board rev. 1.1	sch	pcb	286
Internal BPF and Preamp board rev. 1.3	sch	pcb

We believe open source is a better way of doing things. View and download the Shield Schematic and PCB Kicad/Eagle CAD files, LibreCAD .DXF, or Inkscape .SVG files. The hardware designs are released under the Attribution-NonCommercial 2.0 Generic

Related products - to complete RX system:

Bi-dir beverage atenna - ONE coax output More: link

4-way beverage switch More: link

K9AY simply feeder More: link

Option - Common-mode current choke to ham shack: Link to CMCC

CMCC	CMCC 1 to 3 port