K9AY++ RX Antenna CLASSIC
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.
355.00 € (without tax)
The K9AY is terminated loop RX antenna. It consists of a wire loop of any convenient shape (diamond, delta, etc), hung from a single support and with a ground rod at the bottom. A 9:1 impedance-matching transformer is connected from one end of the loop to the ground and a terminating resistor is connected the other end of the loop to the ground. This antenna is directional. Favoring signals are arriving from the feed point end. You can also change the antenna far field by changing RLOAD (RTERM) of the loop. This set including the RF feeder box and the controller. 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.
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
- RF feeder box into the feed point of the ANT loops
- Aluminium holder
- Controller
- DC cable
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
Data sheet
- type
- ASSEMBLED
- design
- in enclosure
- controller
- with controller
- product dimensions
- 190x140x70 mm - PU box IP56
220x160x60 mm - al box
- product weight (brutto)
- 1.83 kg
- package dimensions
- 26x23x21 cm
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