[Elecraft] K2 and NaP3 IF offset values

[Larry Phipps]

The K2 changes the LO injection from high side to low side above 17m. 
Early versions of NaP3 and PowerSDR/IF  had an option box that allowed 
the user to enter a frequency for K2 (and for K3) which reverses the 
sidebands at a specified frequency, but later versions should do this 
automatically at the correct frequency. I'm not sure which version 
you're using, and I haven't used my K2 with LP-PAN since I got a K3, so 
maybe there's a bug in some of the newer versions.

Larry N8LP



On 11/14/2015 11:31 PM, elecraft-request at mailman.qth.net wrote:
> Date: Sat, 14 Nov 2015 09:15:43 -0700 (MST)
> From: K8AC<floyd at k8ac.net>
> To:elecraft at mailman.qth.net
> Subject: [Elecraft] K2 and NaP3 IF offset values
> Message-ID:<1447517743616-7610348.post at n2.nabble.com>
> Content-Type: text/plain; charset=us-ascii
>
> I've been using my K2 with LP-Pan and NaP3 for a few months on the lower
> bands and just recently got on 20 and 15 meter CW with it.  I found that the
> offsets you specify in NaP3 were considerably different on 15, 12 and 10
> meters while that for 20M was just a bit off from the lower bands.  17M
> offset was the same as the lower bands.  For example, the global offset
> required on 80, 40 and 30M is 1170 in my case.  For 20M, it's 1200.  For 15M
> it's (-285) and (-330) for 10M.
>
> When I say the "offset required", that means the value I need to specify in
> order for the NaP3 center frequency indicator line to be exactly in the
> middle of a received CW signal.
>
> Not quite sure why the offset difference - obviously the IF signal is not
> exactly the same for all bands, but why not?