Matching a 10W Radio to a whip or ground plane
antenna while moving on tracking/hiking route is a tough thing to
this simple antenna Balun, you may have 12.5, 25 and 50 Ohms at your
disposal, which may bring SWR to a lower level while on a move.
Antenna Matching Balun is passive and uses two toroids. Although a
switch could be used, BNC PCB Type connectors are used at three
Balun is designed specifically for QRP Rigs. However, you
may use it with 100W rigs if suitable RF Connectors are used.