K3S Frequency Calibration Issue

[stengrevics]

I have followed the calibration procedure in the manual (WWV as I don’t have a frequency generator).  On 50 MHz, I am spot on.  However, on 2 meters, I am off by 1 KHz.

I have recently replaced the TCXO, so I don’t believe that is the cause.

Any suggestions as to how I can get 2 meters to agree?

73,

John
WA1EAZ
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[Greg Troxel-2]

John Stengrevics <[hidden email]> writes:

> I have followed the calibration procedure in the manual (WWV as I
> don’t have a frequency generator).  On 50 MHz, I am spot on.  However,
> on 2 meters, I am off by 1 KHz.

Without a calibrated signal generator (or generator and calibrated
counter), how are you measuring this?

> Any suggestions as to how I can get 2 meters to agree?

To agree with what, and how do you know it's right?

It would help if you explained more precisely what you did.  I'm
guessing you used 15 MHz WWV, but then what are you doing on 50 and 144
MHz to measure?  Did you measure 28 MHz?  What are you measuring
against?  How is that calibrated, and how do you know it is correct?

(Also, I am unclear on how the 144 Mhz option works, but that's
important to understand.)
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[Bob McGraw - K4TAX]

See XNn OFS on page 68 of the manual.  This compensates fro
oscillator/multiplier errors.

73

Bob, K4TAX


On 8/9/2019 7:55 AM, Greg Troxel wrote:

> John Stengrevics <[hidden email]> writes:
>
>> I have followed the calibration procedure in the manual (WWV as I
>> don’t have a frequency generator).  On 50 MHz, I am spot on.  However,
>> on 2 meters, I am off by 1 KHz.
> Without a calibrated signal generator (or generator and calibrated
> counter), how are you measuring this?
>
>> Any suggestions as to how I can get 2 meters to agree?
> To agree with what, and how do you know it's right?
>
> It would help if you explained more precisely what you did.  I'm
> guessing you used 15 MHz WWV, but then what are you doing on 50 and 144
> MHz to measure?  Did you measure 28 MHz?  What are you measuring
> against?  How is that calibrated, and how do you know it is correct?
>
> (Also, I am unclear on how the 144 Mhz option works, but that's
> important to understand.)
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

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