[ARC5] RF Ammeter Puzzle

[WA5CAB at cs.com]

Both sets were used in most of the same types of aircraft (quantity wise, 
anyway).

In a message dated 2/27/2008 9:45:20 PM Central Standard Time, 
sbjohnston at aol.com writes: 
> The ARC-5 was made for short wire antennas on aircraft, wasn't it?  
> Those antennas would have quite low radiation resistance (which is the 
> load that pulls the current detected by an RF ammeter).  The ART-13 
> might have been designed for longer antennas with higher radiation 
> resistances.  The lower the resistance, the greater the current, for 
> the same power.
> 

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