[Elecraft] RF Ammeter

[Jim Wiley]

As everyone knows, "real" RF ammeters are becoming scarce,  or very 
expensive.  Does anyone out there have info on where to find a circuit 
that is relatively inexpensive that I could use as a substitute?  
Something using a toroid core plus diode, or something like that,  would 
be what I am looking for.   Not too complicated in any case, and  
absolute accuracy is not needed - a relative indication would be fine.   
The application is measuring RF current for a trailing wire antenna  
from an airplane.    Transmitter power is in the 100 watt range.


Thank in advance


- Jim, KL7CC