K9AY ONE DIRECTION RX antenna
The K9AY is RX loop antenna terminated by the resistor. This is ONE direction antenna. There is no directional switching relay. Impedance matching transformer is connected from one end of the loop to the ground and load resistor is connected the other end of the loop to the ground. Favoring signals are arriving from the feed point end. You can set different values by the jumpers. There is also common-mode current choke. This antenna is designed for SO2R or M/M setup - you can share this one direction to the more RX
Main functions:
- Broadband 0,2 MHz to 30 MHz
- 1 direction about 110 deg.
- Designed for Multi-Receivers - sharing direction
- Needs small room
- Great for portable operations
- Ideal for Broadside or End-Fire antenna array.
- 50/75 ohm feed line - jumper switch inside
- Common-mode coax choke icluded.
- Variable Rload in 8 steps by the Jumpers.
- High voltage electrostatic protection with neon lamps.
- High power IN/OUT protection with PTC.
- Stainless connections screws.
- Quality F or PTFE SO-239 connector.
- IP56 box - recommended to protect it against the water.
- Size 10x10 cm.
- Available as: assembled, ready to use
Parameters:
- RX antenna - Gain depends on loop size
- One direction about 110 degrees
- F/B depends on loop size and construction
- You can find more design hints (phased array) at this link
- Feed line impedance 50 or 75 Ohm
- Common-mode choke isolation more than 30 dB
- Current protection > 100mA and Voltage protection > 65V
Usage:
- RX antenna designed for ONE direction
- Easy to share it by the RX antenna switch
- Designed for RX antenna array: End-Fire, Broadside
- Noise source antenna for QRM eliminator
Example for K9AY one dir in Multi RX setup:
Example of K9AY phased arrays (click on picture):
Download
| K9AY ONE DIR RX antenna | ||||
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| Manual in WiKi | WiKi manual | |||
| Antenna loop design examples | WiKi loop design | |||
| YOUTUBE videos | YouTube | |||
| rev. 0.2 | Schematic  |
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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 |
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