[Elecraft] P3 Not Zeroed

[Kevin, N4TT]

Thanks all!

There's a ref cal on the K3s. I ran through the procedure for that using 15
MHz and rechecked on 10 MHz. Seems this was quite a bit off. Now, not only
is it lining up on WWV but also any CW signal I select lines up very
closely between the marker on the P3 and a 600 Hz marker on fldigi with the
sidetone set to 600.

A thing I noticed. When making the adjustment on the P3 the offset would be
different for different signals. 15 MHz was 263 while 10 MHz was 210. So
there was no one-size-fits-all adjustment there. On the K3s, I adjusted for
15 and everything came into sync including the P3, which now reads 12 for
the ref adjustment and is consistent across a number of signals.


Learning more every day. And liking it more.

73,
Kev N4TT

On Tue, Jul 23, 2019 at 2:38 PM Joe Subich, W4TV <lists at subich.com> wrote:

>
> On 2019-07-23 12:47 PM, Alan Bloom wrote:
>  > Also be aware that the center frequency differs depending on mode.
>
> The P3 *should be able to account for that* by using the FI get:
>
> > FI * (I.F. Center Frequency; GET only)
> > RSP format: Finnnn; where nnnn represents the last 4 digits of the
> > K3’s present I.F. center frequency in Hz.  Example: If nnnn = 5000,
> > the I.F. center frequency is 8215000 Hz.  Intended for use with
> > panadapters, which need to keep track of the exact I.F. center
> > frequency as filter bandwidths and shifts are changed by the
> > operator.
>
> 73,
>
>     ... Joe, W4TV
>
>
> On 2019-07-23 12:47 PM, Alan Bloom wrote:
> > Good advice.
> >
> > Also be aware that the center frequency differs depending on mode.  For
> > example, it is the supressed carrier frequency on SSB but is offset by
> > typically 600 Hz on CW.
> >
> > I like to use AM mode for frequeny calibration.  After doing a frequency
> > calibration on the K3, tune to a signal on the AM broadcast band and
> > adjust the P3 frequency calibration.  (MENU:RefCal.  Cal procedurre is
> > on page 39 of the manual)  As I recall, AM broadcast stations are
> > required to be within 20 Hz of nominal frequency but are typically much
> > closer than that.
> >
> > Alan N1AL
> >
>
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