[Elecraft] Bandfilter alignment: at midband or what?

[joswarnier]

Bart,
here the same problem  in Belgium, ( 7000 to 7100 Khz )
...as I use only the cw part, ...I did all the aligment around the qrp
calling freq's
best 72's
Josef
ON6WJ
K2#4296
MP+#19

----- Original Message ----- 
From: "PA3GYU" <pa3gyu at amsat.org>
To: <elecraft at mailman.qth.net>
Sent: Tuesday, September 14, 2004 9:01 AM
Subject: [Elecraft] Bandfilter alignment: at midband or what?


> 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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