[Elecraft] Calibration of BFO

Tue Feb 5 11:14:01 2002

Your mail reader should turn =3D20 to a space, and =3D3D to an equals =
sign for you. Thaose are standard "Quoted Printable" escape strings.

Dan / WG4S / K2 #2456

-----Original Message-----
From: [email protected]
[mailto:[email protected]]On Behalf Of Julian, G4ILO
Sent: Tuesday, February 05, 2002 5:00 AM
To: Elecraft List
Subject: Re: [Elecraft] Calibration of BFO

I've noticed a shift after thinking I'd pretty much eliminated it. =
Perhaps
I don't have the necessary patience, but I've come to the conclusion =
that
eliminating the shift between filters on my K2 is impossible. If others
have achieved it, it is probably just because on their K2 the DAC steps
just happen to coincide with the exact amount of voltage needed to shift
their BFO the right amount, or something. So some people will manage it,
and others never will. Although if Ron's theory is right, it's a matter =
of
luck for all of us.

The CW filters were the worst, I found. The only way to eliminate a =
really
noticeable pitch change between two of the filters was to choose a
different center frequency, which presumably moved the BFO
voltage/frequency relationship to a different part of the curve.

I really hope the K3 will have true 1Hz resolution! :-)

By the way, does everyone see this =3D20 =3D3D garbage in messages, or =
is it
only in the digests? It does make some posts hard to read.

--
Julian, G4ILO. (RSGB, ARRL, K2 #392)
Homepage: http://www.qsl.net/g4ilo

"Randy Moore" <[email protected]> wrote:

Dave, when you get the frequency shift between filters down to 1 Hz, =
does
it
stay there?  I have noticed changes with time that are greater than 10 =
Hz
on
my K2.

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