"Dr.Death" wrote in message
...
You should have a calibration chart for it as the knob in the middle is
used for setting the calibration of frequency /power. Example: If you are
using it on 11meters and you know what wattage your radio puts out, adjust
the knob for that wattage and it will give you the swr.


Also if you plan to use this on multiple frequencies, you should use another
watt meter and make yourself a chart or try to find who made the unit and
see if you can get a chart, or ask in the ham groups to see if anyone has a
chart for this unit.