RX antenna - 4-way switch KIT assembling
rev.1.0 2/2017 by Jan OK2ZAW
Schematic
- This switch is controlled by NEGATIVE VOLTAGE: -12V!
Board
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
- Place LED diode in right polarity!
- Longer leg is + and is connected to GND on PCB.
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.