I believe that any measurement, however crude, is better than no measurement at all; I am just following W7ZOI and Lord Kelvin in my thinking. To extend the "torch" analogy; I have two unknown resistors; I place each in turn in the circuit and note the brightness of the lamp in each case. Now I know which one has the higher resistance. The line used need not be any particular length; just a short piece would do. The termination at the load end should be acceptable to the transmitter; perhaps SWR of 2:1. So a suitable combination of load & "leak" resistors might be two x 50-ohms. Alternatively, build an attenuator (say 10dB) at the transmitter end; this will "set" the impedance seen by the transmitter and what goes on at the load end of the line won't bother it. Combinations of resistors should get the required 10w rating; in a 10dB pi attenuator about 50% is dissipated in the input resistor, about 35% in the series one and about 5% in the output one. There are a few current meters on the 'net including (but not limited to); http://www.antennasbyn6lf.com/ http://www.seed-solutions.com/gregordy/Amateur Radio/Experimentation/RFProbe.htm http://www.karinya.net/g3txq/milliwatt_meter/ Have fun! Incidentally 'FXXX; are you going to Wyong? I know it's a long way but I used to do it from Coffs each year. I think a group from Summerland comes-down each year.