Difference between revisions from 2021/03/18 13:16 and 2021/03/18 13:15.[<-- Back to Index|Main page] | [<-- Web page|https://remoteqth.com/4-way-switch.php]
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rev.1.0 2/2017 by Jan OK2ZAW
[https://remoteqth.com/img/ZAW-WIKI/biasteeacdc/4dir_bias_850.jpg|noborder]
[https://remoteqth.com/img/ZAW-WIKI/4-way/4way-sw-wiki.png|noborder]
[https://remoteqth.com/img/ZAW-WIKI/4-way/8.jpg|noborder]
[https://remoteqth.com/img/ZAW-WIKI/4-way/9.jpg|noborder]
Example of use
[https://remoteqth.com/img/ZAW-WIKI/biasteeacdc/4dir_bias_850.jpg|noborder]
!!Schematic
* This switch is controlled by NEGATIVE VOLTAGE: -12V!
[https://remoteqth.com/img/ZAW-WIKI/4-way/sch.jpg|noborder]
!!Board
[https://remoteqth.com/img/ZAW-WIKI/4-way/brd.jpg|noborder]
!!Board Assembling
* Use right resistors!
* for 50 Ohm coax line use 2 x 100R/2W
* for 75 Ohm coax line use 2 x 150R/2W
[https://remoteqth.com/img/ZAW-WIKI/4-way/1.jpg|noborder]
[https://remoteqth.com/img/ZAW-WIKI/4-way/2.jpg|noborder]
* Place LED diode in right polarity!
* Longer leg is + and is connected to GND on PCB.
[https://remoteqth.com/img/ZAW-WIKI/4-way/3.jpg|noborder]
[https://remoteqth.com/img/ZAW-WIKI/4-way/4.jpg|noborder]
!!BOX
* Drilling template
* [PDF file|https://remoteqth.com/img/ZAW-WIKI/4-way/drill.pdf]
[https://remoteqth.com/img/ZAW-WIKI/4-way/drill.png|noborder]
[https://remoteqth.com/img/ZAW-WIKI/4-way/10.jpg|noborder]
* Example for F connector
[https://remoteqth.com/img/ZAW-WIKI/4-way/11.jpg|noborder]
[https://remoteqth.com/img/ZAW-WIKI/4-way/12.jpg|noborder]
* You can use Glue gun to fix F connector.
[https://remoteqth.com/img/ZAW-WIKI/4-way/13.jpg|noborder]
!!Common mode current choke
* Common mode current choke construction
* Wind 4 turns on one side than cross to another side of cores and wind rest turns.
[https://remoteqth.com/img/ZAW-WIKI/4-way/5.jpg|noborder]
[https://remoteqth.com/img/ZAW-WIKI/4-way/6.jpg|noborder]
[https://remoteqth.com/img/ZAW-WIKI/4-way/7.jpg|noborder]
!!Assembled
[https://remoteqth.com/img/ZAW-WIKI/4-way/16.jpg|noborder]