RA3WDK `s Homepage

Magic QRP SWR Bridge

I use this portable SWR bridge without power supply with my QRP 20/40 m transceiver

If you want to buy KIT of Magic Bridge please look at K6VHF`s info here


You can download my article in Russian magazine "RADIO" ( 2012)

1 part

2 part

PCB file





For measure need only send RF power from transceiver.

Magic QRP SWR Bridge not need any power supply !

New Magic QRP SWR Bridge v.3

Correct indication of the low and high levels SWR for different power ( 1 - 25W !)

New Magic QRP SWR Bridge v.3



Some theory of RF bridge, click image to download XLS file

My old HomeMade Bridge with HF oscillator and digital scale