With a [DC-500MHz] dummy load on my new MFJ-921 2M tuner, both
adjustable capacitors have to be set at around 3 to get SWR=1.0, with
the minimum being quite sharp.

I took off the cover and verified that cap settings of zero are indeed
minimum capacitance.

See: http://www.hy-gain.com/man/mfjpdf/MFJ-921.pdf

Shouldn't both caps be at the minimum setting for SWR=1.0 with a dummy
load connected? What does it mean if I need to add capacitance at
both points to tune a dummy load?

Should I reset the knobs so that they show zero when a dummy load is
connected?

Ken KC2JDY
Ken
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