[Elecraft] SWR Reading Accuracy

[Ken Kopp]

I found my WM-2 -very- difficult to calibrate accurately.
The pots are far too "touchy".  Someday, I'll replace
them with 10 or 20 turn Trimpots.

I have several Birds w/50W elements and two Bird loads, 
but remember, their accuracy isn't what we all seem to think 
they are.

I found the best accuracy came from using an Elecraft 50 
ohm load and my DVM's voltmeter.  Of course, the ultimate 
accuracy then becomes that of the DVM.

Use -much- caution when using watt meters to calibrate
RF-measuring devices.

73! Ken Kopp - K0PP
       ElecraftCovers at rfwave.net