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K9AY++ RX Antenna CLASSIC

K9AY++ RX Antenna CLASSIC

1 Review

This is small four directional RX antenna for lower HF bands. Ideal for portable use as well as for home installation. Antenna has got Band Pass Filters and Preamplifier in the feed point of the loops. It is advantage of filtering and amplification small signals directly from antenna. Controller is able to control also Bi-directional 4-way system.

Main functions

Low noise RX antenna
Broadband
4 directions
Needs small room
Great for portable operations
50/75 Ohm feed line tolerant
PREAMP with variable gain 0 to 18 dB
Three switchable BPFs or BYPASS
RX protections/limiters in feeder and controller
Common-mode filter in feeder
RX source switch for TX and RX antenna

RF feeder box

ONE versions for:
- 1. Variable load resistor - RLOAD
- 2. Fixed load resistor - RLOAD
- 3. Easy to set by one JUMPER
Common-mode coax choke included
PREAMP with variable gain 0 to 18 dB
Three switchable BPFs or BYPASS
Front-end RF limiters
High voltage electrostatic protection with neon lamps
High power IN/OUT protection
Safe to use it close to TX antenna
Easy to use LAN RJ-45 UTP CAT-6 cable
F/B depends also on loop installation
Stainless screws and nuts
High quality connectors
IP56 box - recommended to protect it against water
Feeder size 200x150 mm
ASSEMBLED and TESTED VERSION

Controller

Universal box for K9AY or 4-way Bi-Dir beverage system - there are BPFs and Preamp only in K9AY++ feeder, not for beverages!
If you want to use K9AY and 4-way beverage system with BPFs and Preamp, this is better solution K9AY/4-way controller + simply K9AY
Including Bias Tee AC/DC
HPF > 50 kHz as AC noise eliminator
Front End protections
RF power limiters in RX line
LED direction indicator 0 or 45 deg. - image
Rload variable by potentiometer on the front panel
Three BPFs and Bypass - 4 positions switch on the front panel
Preamplifier switch and LED indicator
RX SOURCE switch. Selecting TX or RX antenna for receiving. More info: image and manual

Parameters

Supply voltage DC (AC for 4-way beverage system) 12 - 14 V up to 2 A
Preamplifier with 1 W NPN transistor 2SC5551A
Preamp BIAS current 10 to 70 mA
Gain: up to 18 dB - preset to 10 dB
Noise Figure (NF) < 2 dB
REAL OIP3 34 dBm
Input HPF > 50 kHz (AC limiter)
BPF insertion loss lower than 1 dB
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)

Available as

ASSEMBLED: classic version - ready to use
ASSEMBLED: remote version - ready to use - REMOTE VERSION

K9AY++ system includes:

RF feeder box into the feed point of the ANT loops
Aluminium holder
Controller
DC cable

RECOMMENDATIONS TO BUY:

CMCC for coax & controller cable K9AY++

Included in package

RF feeder box assembled and tested
Controller assembled and tested
DC plug - image
DB15 male connector with cover
Mounting holder with bracket - image

Manual

If you want to know more please check our wiki with K9AY++ RX antenna manual & K9AY/4-way antenna switch controller manual.

RF feeder box

RF feeder box inside

RF feeder box inside diagram

controller

K9AY++ controller block diagram

holder and accessories

Band Pass Filters characteristic with preamplifier

160m BPF with preamp

80m BPF with preamp

40m BPF with preamp

BYPASS with preamp

Option: Common-mode current choke for coax and control cable

Coax cable current isolator
Common-mode current isolator also for control cable
You can use part of FTP CAT-5 cable from antenna to this optional box as GND system
Recommended to place it into the hamshack too