Re: K3- To zero beat or not to zero beat

Posted by k6mkf on Feb 22, 2019; 5:12am
URL: http://elecraft.85.s1.nabble.com/K3-To-zero-beat-or-not-to-zero-beat-tp7649117p7649118.html

Perhaps what we are seeing here is the cumulative error of the transceivers in the chain.

The DX tunes the rig to 14023 and calls CQ, but their transceiver is just a bit off frequency for one reason or another, so they are really on 14022.95.  

The spotting station’s transceiver is also a bit off frequency, so when the DX is tuned in, the spotter’s rig shows 14023.1 - and that’s what gets spotted if the frequency is acquired as data from the rig.  If the spot is generated by keyboard, then more errors are possible.

So when you click the spot, you go to 14023.1 and are .15 off the DX frequency +\- whatever variable your rig might introduce.

I don’t have the expectation that when in click on a spot that I will be exactly on the DX frequency.  I just like to land in the general neighborhood!

-- Mike Flowers, K6MKF, NCDXC - "It's about DX!"

> On Feb 21, 2019, at 8:42 PM, RVZ via Elecraft <[hidden email]> wrote:
>
> I have noticed the same problem on both my K3 and K3S.  I would think the spots and the K3/K3S frequencies would be the same a lot more often than they are.
> 73,Dick- K9OM
>
> In a message dated 2/21/2019 7:09:19 PM Eastern Standard Time, [hidden email] writes:
>
> Message: 18Date: Thu, 21 Feb 2019 16:44:12 -0500From: N4ZR <[hidden email]>To: Elecraft List <[hidden email]>Subject: [Elecraft] To zero beat or not to zero beatMessage-ID: <[hidden email]>Content-Type: text/plain; charset=utf-8; format=flowed
> Ever since I have owned my K3, I have noticed that most spots put the K3's receiver above the actual frequency of the spotted station.? Initially, I thought this might have to do with DX spots being rounded to the nearest 100 Hz, but then I realized that, if that were the case, X percent of spots should be high, X low, and Y (whatever percent) effectively right on.
> I've checked the K3's calibration, and it appears to be right on at 10 and 15 MHz, tuning in CW mode to WWV's carrier at my preset beat note.? One possibility that occurred to me is that perhaps the DX cluster convention is always to round up, rather than up or down.
> Seems a little unlikely to me, but does anyone know the answer?? I'm perfectly happy to keep jogging the main tuning knob a bit on most spots, but thought I'd ask.
> --
> 73, Pete N4ZR
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