I'm not exactly happy with the Jones filter on my Argonaut II.
a) the centre of the bandpass shifts up frequency (on USB) when I
tighten the bandpass width
b) the narrowest width setting is about 700Hz: I could do with 500Hz or
The manual warns against adjusting the two sets of 4-pole filters unless
you have a network (spectrum, surely?) analyser, which I do. Anyway, the
adjustment pots are all locked in position with some sort of fixative.
Has anyone had a go at adjusting the filters?
If so, I would appreciate some advice - which might be, of course, don't
try and fix it!
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