Its OK to -very gently- stand up and line up toroids that might have
been shifted in shipping. If they resist movement, do not force them.
(They don't like abuse.. ;-)
But absolutely DO NOT readjust the spacing or location of turns on the
cores. On many of the cores, especially those in the Low Pass Filters,
we make small changes in their inductance by squeezing turns to optimize
the return loss to the driving stage etc.
Also, please do not make adjustments to the trim caps on the band pass
filters. We tune each filter while looking at its response on a spectrum
analyzer with tracking generator.
73, Eric WA6HHQ
----
Ron D'Eau Claire wrote:
Craig NZ0R wrote:
"You could avoid the problem by convincing Elecraft to ship a "torroids
(sic) only" version of the kit. It would be the same kit but without the
torroids. You'd have the joy of winding them yourself and installing them on
the board. Of course you wouldn't get the benefit of factory testing of your
finished K3.
:-)"
---------------------
And that's a HUGE ISSUE! The correct alignment of those filters requires
equipment not available to most Hams. That's why there are warnings in the
manual NOT TO TOUCH ANY ADJUSTMENTS ON THE BOARDS! All user adjustments are
done in firmware through the front panel controls.
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