[Elecraft] Sync AM and checking VFO accuracy using WWV

[Ken Arck]

I calibrate all my rigs with the WWV/spectrum display software method 
and it's never gotten me in trouble! From my K3s to my TS2000 to my 
FTDX3000, they all are dead nuts on thanks to this easiest of methods!

Ken


At 01:22 PM 12/18/2016, ab2tc wrote:
>Hi,
>
>Boy, this thread is now incredibly long and I am not sure it if I want to
>risk sticking my neck out with another entry. But I will.
>
>There has been an intense debate for at least the past 8 years as to what
>constitutes the "best" way to adjust the reference oscillator to the best
>accuracy. Why not just stick with the "Zero beating" (Method 2) described in
>the manual? All it requires is clear reception of WWV at the highest
>frequency possible. No other instrumentation like a PC spectrum analyzer
>program or frequency counter is needed. As for accuracy, the only possible
>weakness I can see is the accuracy of the K3 audio side tone, but there is
>no reason why this should not be accurate to a fraction of the Hz. Barring
>that the method is perfect. (The expectation that the PC spectrum analyzer
>is any more accurate is dubious). Aw, forget about Doppler shift in the WWV
>signal. Under normal ionospheric conditions it's negligible.
>
>AB2TC - Knut
>
>PS. I would also describe the sound heard at near zero beat as
>"whump-whump-whump" or "wow-wow-wow", but certainly not "chirp-chirp-chirp".
>And I agree with the comments below.
>
>
>k6dgw wrote
> > There are a myriad of ways to do it if you're interested, however don't
> > underestimate the accuracy you can achieve with your ears and ability to
> > count when you get the levels equalized.  If you count 6 noise peaks in
> > 60 sec, you're within 0.1 Hz.
> >
> > Something that hasn't been mentioned [and that I only alluded to in a
> > previous post] is doing this during the tone-free minutes on WWV.  The
> > tone modulation can make it very difficult, and in some cases your
> > result can be off by the frequency of the tone.
> >
> > 73,
> >
> > Fred K6DGW
> > Sparks NV USA
> > Washoe County DM09dn
> > <snip>
>
>
>
>
>
>--
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>Sent from the Elecraft mailing list archive at Nabble.com.
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