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K9AY++ RX Antenna REMOTE

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.

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395.89 € (tax excl.)
395.89 € without tax
479.03 €
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Description

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. 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. 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. Feeder box consists of directional switch relay, variable and fixed Rload, matching transformer from end protections, BPFs for 3 low bands, preamplifier and common-mode filter. Controller allows you to switch all this features over one control cable (8 wires) and there is also Remote Control DB-15M connector for external remote control. This set includes the RF feeder box and the controller.


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
  • Remote Control ready

RF feeder box

  • ONE versions for:
  • Common-mode coax choke included
  • PREAMP with variable gain 0 to 18 dB
  • PREAMP Noise Figure less than 2 dB
  • Three switchable BPFs or BYPASS
  • Front-end RF limiters
  • High voltage electrostatic protection with neon lamps
  • High power IN/OUT protection with PTC
  • 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 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 > 100 kHz as AC noise eliminator
  • Front End protections
  • RF power limiters in RX line
  • LED Indicator LOCAL/REMOTEimage
  • 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

Remote Control Notes

  • 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 automatically deactivate front panel switches and you can control it over these external voltages at DB-15M Remote Control connector. All LED indicators still work. Please, read the manual.
  • We are preparing new universal web based controller not only for K9AY++. Coming soon ODKAZ.

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 > 100 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)
  • Remote Control by external 12 to 14 V DC at remote DB15M

Available as

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

K9AY++ system includes: RECOMMENDATIONS TO BUY:

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

k9ay++ feeder box by qro.cz hamparts.shop



RF feeder box inside

k9ay++ feeder inside by qro.cz hamparts.shop



RF feeder box inside diagram

k9ay++ feeder inside by qro.cz hamparts.shop



controller

k9ay++ controller remote version by qro.cz hamparts.shop



k9ay++ controller remote version by qro.cz hamparts.shop



k9ay++ controller remote version by qro.cz hamparts.shop



K9AY++ controller block diagram

k9ay controller remote version block diagram by qro.cz hamparts.shop



holder and accessories

k9ay++ remote version holder and accessories by qro.cz hamparts.shop



Band Pass Filters characteristic with preamplifier

160m BPF with preamp

k9ay++ system measurement qro.cz hamparts.shop



80m BPF with preamp

k9ay++ system measurement qro.cz hamparts.shop



40m BPF with preamp

k9ay++ antenna system measurement qro.cz hamparts.shop



BYPASS with preamp

k9ay++ rx antenna system measurement poty adapter qro.cz hamparts.shop



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

k9ay++ rx antenna with common-mode current choke by qro.cz hamparts.shop



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Product Details

Data sheet

type
ASSEMBLED
design
in enclosure
controller
with controller
Attachments
40m
MMANA file for 40m
Download (561B)
80m
MMANA file for 80m
Download (567B)
160m
MMANA file for 160m
Download (564B)
80m & 160m
MMANA file for 80m and 160m by OK2ZAW
Download (527B)
k9ay how to build
pdf file about how to build the K9AY loop receiving antenna by Gary Breed, K9AY
Download (56.69KB)
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