Difference between revisions from 2017/01/04 10:54 and 1999/11/30 00:00.
!!Assembled KIT
[https://www.remoteqth.com/img/ZAW-WIKI/K9AY_FIX/1.png|noborder]
!!All parts you need - KIT
[https://www.remoteqth.com/img/ZAW-WIKI/K9AY_FIX/1.jpg|noborder]
!!The drill drawing
Paste the drawing on the box and fix it with some tape.
[https://www.remoteqth.com/img/ZAW-WIKI/K9AY_FIX/2.jpg|noborder]
[https://www.remoteqth.com/img/ZAW-WIKI/Bi-Dir_1out/10.jpg|noborder]
!!Schematic diagram
* [bigger schematic diagram - version 2.0|https://www.remoteqth.com/img/ZAW-WIKI/K9AY_FIX/schema_big_V2.0.jpg]
* PLEASE ADD 100uF/35V CAPACITOR OVER C4 AND C5 IN RIGHT POLARITY !!!
- version 2.0
[https://www.remoteqth.com/img/ZAW-WIKI/K9AY_FIX/schema_v2.0.jpg|noborder]
!!Insert rest parts
[https://www.remoteqth.com/img/ZAW-WIKI/K9AY_FIX/3.jpg|noborder]
- PCB mistake on version 2.0 - sorry for that
[https://www.remoteqth.com/img/ZAW-WIKI/K9AY_VAC/PCB-chyba.png|noborder]
- chooce the control way...
- Version < 2
[https://www.remoteqth.com/img/ZAW-WIKI/K9AY_VAC/remark.jpg|noborder]
- Version < 2
[https://www.remoteqth.com/img/ZAW-WIKI/K9AY_VAC/remark.jpg|noborder]
!!TRANSFORMERS winding - very important thing!
** for 50 ohm coax feed line : 2 turns on primar (coax) and 6 turns on secondar side (loop)
** for 75 ohm coax feed line : 2 turns on primar (coax) and 5 turns on secondar side (loop)
[https://www.remoteqth.com/img/ZAW-WIKI/Bi-Dir_1out/20.jpg|noborder]
!!Front side
[https://www.remoteqth.com/img/ZAW-WIKI/Bi-Dir_1out/21.jpg|noborder]
!!Front side
[https://www.remoteqth.com/img/ZAW-WIKI/Bi-Dir_1out/22.jpg|noborder]
!!Common-mode coax choke
- choke measurements
* [OK2ZAW.com Blog|http://ok2zaw.blogspot.com/2016/06/common-mode-current-choke-for-rx-cables.html]
[https://www.remoteqth.com/img/ZAW-WIKI/Bi-Dir_1out/40.jpg|noborder]
!!Wind the coax
- Wind the coax as is on the picture, there should be 7 or 8 turns.
- fix it by one binder and use second one to fix choke to the PCB
[https://www.remoteqth.com/img/ZAW-WIKI/Bi-Dir_1out/28.jpg|noborder]
[https://www.remoteqth.com/img/ZAW-WIKI/Bi-Dir_1out/29.jpg|noborder]
!!Solder the coax
[https://www.remoteqth.com/img/ZAW-WIKI/Bi-Dir_1out/30.jpg|noborder]
[https://www.remoteqth.com/img/ZAW-WIKI/Bi-Dir_1out/31.jpg|noborder]
!!KIT - all parts assembled.
[https://www.remoteqth.com/img/ZAW-WIKI/K9AY_FIX/4.jpg|noborder]
!!Example of controller.
* [bigger schematic|https://www.remoteqth.com/img/ZAW-WIKI/K9AY_FIX/ovl.png]
- Injector to coax line:
[https://www.remoteqth.com/img/ZAW-WIKI/K9AY_VAC/inj.png|noborder]
- direction controller
[https://www.remoteqth.com/img/ZAW-WIKI/K9AY_FIX/ovl.png|noborder]
!!K9AY loops design example.
* It is VERY recomended to place K9AY loop antenna as far as possible from metal towers, antennas and wires. This hepls to obtain better paramaters of antenna ( directivity and noise ).
* [MMANA file of my small design for 160 and 80m|https://www.remoteqth.com/img/ZAW-WIKI/K9AY_VAC/mmana/K9AY_ZAW_160+80.maa]
[https://www.remoteqth.com/img/ZAW-WIKI/K9AY_VAC/mmana/ant.png|noborder]
!!K9AY loops - external links.
* [Tom N5EG: Some Observations on the K9AY Receive Directional Antenna|https://www.remoteqth.com/img/ZAW-WIKI/K9AY_VAC/ext/Observations_on_K9AY_receive_antenna.pdf]