[Elecraft] kx1 test and alignment part I

[Ron D'Eau Claire]

RC KC5WA asked:
On pg 28 right coluum 2nd step:
checking AC measurements using DMM
~~~~~~~~~~~~~~~~~~~~~~~~~~
Should an RF probe be used.
Instructions do not state either way.

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No. The oscillation you are checking for would be in the normal a-c range of
your DMM. That's why the instructions say to probe those points with your
DMM in the 200 to 300 millivolt a-c range. 

RF probes rectify the signal and provide a d-c level for the meter to
indicate. Most RF probes have resistors in them to produce a d-c reading on
the meter equivalent to the RMS voltage of the RF signal - assuming a good
sinusoidal waveform. 

Ron AC7AC