FW: [Elecraft] Frequency Shift

Sat Feb 1 06:08:03 2003

Looks to be 3 of them bang-on to me. Just adjust FL1 to match the others.

You'll find many methods to set up filters on the reflector, but to match
them, the "Do 4 first, then 3, then 2 and finally 1" method for final
alignment seems the best to me. As long as all are set the best you can with
Spectrogram first, then a final pass (one or two clicks up or down each)
through 3, 2, 1 to center the beat freq won't moxie up anything.

(I assume your ST-P is on .60 so you might be 30 hz low on zero-beating an
inbound signal. I doubt ANY recieving station will notice!)

Dan / WG4S / K2 #2456

-----Original Message-----
From: [email protected]
[mailto:[email protected]]On Behalf Of John Huffman
Sent: Friday, January 31, 2003 8:59 PM
To: [email protected]
Subject: [Elecraft] Frequency Shift

All -

Finished K2 serial number 3194 this week and enjoying the radio.  As with
anything new, you notice things and wonder if they all act that way or it's
just yours.

That's especially true when you build it yourself.

Here's what I noticed, changing filters changed the pitch of the signal.
Mode is CW.  Pitch of incoming received signal (I used WWV for testing) is
shown on Spectrogram at:

Filter     Width     Pitch of Signal       Change
FL1        150           608
FL2         70            576                     32 hz.
FL3         40            581                       5 hz.
FL4         10            581                       0 hz.

The only one I really notice is the change from FL1 to FL2.  Suspect it may
have to do with my filter calibration.

Either this is typical or it's just mine.  Comments?

Thanks in advance,
73 de NA8M
John

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