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
[EMAIL PROTECTED]
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