[Elecraft] W2 Wattmeter

[Phil & Debbie Salas]

"Those are good points about the trigger and perception of accuracy of the
W2.  I have yet to see field test data of the W2 in regards to accuracy of 
the
Wattmeter and SWR indications."

According to the manual the W2 has an accuracy of +- 0.5dB typical (nothing 
about worst-case).  This is 10-12% accuracy.  Not as good as the 
PowerMaster/LP-100A/Telepost class of wattmeters that use NIST-traceable cal 
equipment (which should get you more like 3-5% accuracy).  Of course, those 
are $100-$150 more expensive than the W2.  If you use the W2 LED display, 
your perceived error could be greater than the 10-12%.  As an example, if 
you really have 100 watts and the W2 reads it 1/2-dB low, then possibility 
only the 80-watt LED would light.  So this would give you a 20% reading 
error.

Maybe the ARRL will do a review sometime soon.

Phil - AD5X