[Amps] FW: Decent HF directional coupler for RF power meas.

[Ron Youvan]

>>From what I know about the calibration procedures that one manufacturer
> uses, he has a lab calibrated HP436A Power meter and some attenuators that
> are used for comparison. If I remember right the 436 has an accuracy spec of
> 1.2%. Put that together with attenuator and cable errors and you would be
> very lucky to come out with 3% accuracy. But it is still probably better
> than the accuracy of a bird meter.

   The cable and attenuator errors can be known without error, all he has to do is pay a 
cal laboratory to characterize each at the test frequencies.
-- 
    Ron  KA4INM - I'm proud to be Chuck's pop!