Hi Wayne,
An absorptive bridge uses resistors and a voltage measurement to measure SWR.? The way that it does this puts the worst SWR the TX sees at 2:1.? You need to switch the bridge out once the antenna is tuned.? All of the tuners like this have a toggle switch to do so.
An alternative is an SWR indicator based on the same resistor setup.? Here is one from QRPGuys:
You switch in the resistors until you have a good match, then switch the indicator to Operate.
73
Evan
AC9TU
