[Elecraft] Bandfilter alignment: at midband or what?

PA3GYU pa3gyu at amsat.org
Tue Sep 14 03:01:06 EDT 2004


Hi all,

When aligning the bandfilters ('Transmitter Alignment'), I would think
the whole idea is to do this at midband frequency, to make sure as
much of the band is passed as well as possible.

Now I'm not sure about US bandlimits, but here in the Netherlands the
40 meter band runs from 7000 to 7100 kHz, so midband freq.equals 7050.
But the K2 manual tells me to align the bandfilters for max output at
7100 kHz. Hmmm....

Question: wouldn't I be better of aligning the 40m filter on 7050? And
likewise at European midband frequencies for the other bands? Or would
it make little difefrence anyway?

BTW: I couldn't find anything on this subject in the archive, hence my
question. And I couldn't find anything on the bandfilter bandwidths in
particular either.
And I AM curious, so... any pointer to info on the matter would be
welcomed.

Bart de PA3GYU
K2 #4389




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