4-way Bi-dir beverage antenna system

4-way beverage antenna system with controller, BPFs and preamp

This antenna consists of 2 x Bi-dir beverage sets, 4-way antenna switch and controller. That all allows you to have 4 directions beverage antenna system with only one coax line from field to the controller. Controller have got Bias Tee (AC/DC), HPF (kill AC noise), internal PCB with 3 BPFs, preamp and protections. There is also RX/TX RF switch for TRX which does not have input for RX antenna. More in manual.

Main functions:

Low noise RX antenna system

Broadband 0,1 to 30 MHz

4 directions beverage/K9AY

Small room for K9AY, larger for beverages

50/75 Ohm feed line tolerants

Built-in Bias Tee AC/DC

PREAMP with variable gain 0 to 18 dB

Three switchable BPFs or BYPASS

RX protections and limiters in controller

RX source switch for TX and RX antenna

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 Indicator LOCAL / REMOTE Picture
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

Controller Block diagram:

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

Broadband 0,2 MHz - 30 MHz
Bi-directional - two directions with one beverage antenna
Low noise
Twinlead or open wire line
50/75 ohm feed line version
Two construction versions
1. Antenna element in the air
2. Antenna element on ground = BOG Construction and classic vs. BOG
ONE coax output to 4-way middle switch.
One coax version is switchable by positive voltage (+12V) - negative voltage on request.
Common-mode coax choke included. Compare to others on market
Electrostatic protection with glim lamps.
Stainless connections screws.
Quality PTFE SO-239 or F connector.
IP56 box. Recommended to protect it against water and snow.
Size 10x10 cm (feeder), 5x6 cm (terminator).

4-way beverage switch More: link

Broadband
High voltage protections
50 or 75 ohm feed line versions
Common-mode coax choke included for OUTPUT coax

Electrostatic protection with glim lamps.
Stainless screws.
Quality PTFE SO-239 or F connector or N on request.
IP56 box.
Size 10x10 cm.

Control voltage up to 15 V AC/DC
Switch is controlled by - 12 V DC or AC
Maximal current up to 300 mA
Insertion loss less than 0,5 dB
Common-mode current choke with isolation over 30 dB at output port

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

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)

Controller comparison:

Band Pass Filters characteristic:

160m BPF

80m BPF

40m BPF

Band Pass Filters characteristic with preamplifier:

Option - Common-mode current choke to ham shack:

Link to CMCC

CMCC	CMCC 1 to 3 port

Download

Controller
Manual page for versions:	< 2022	> 2022
Front Panel board rev. 2.3	sch	pcb	pcb
Controller connector board rev. 3.2	sch	pcb	362
RX/TX switch board rev. 1.1	sch	pcb	366
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