I need a SWR meter for the 160 meter transmitter. So I build one in an old 27 Mhz CB SWR meter enclosure. It is a ressitortype bridge.It looks like this one:
I use 2 100Ohm resitors in parallel to make the 50 Ohm . Those resistors can handle 1 Watt so I can use the bridge for 5 watt QRP transmitters.
A bridge like this limits the mismatch for the TX. That is ideal for testing homebrew transmitters on air.
It is no ready yet I need to add a switch to bypass the bridge when tuning has finished. The bridge consumes 75% of the power. So a bypass switch is needed.
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