[Elecraft] ksb2 tx/rx alignment

[Tom Hammond]

Neil & John:

Consider using the 5th harmonic of the 4MHz oscillator and beating it 
against WWV at 20 MHz. When WWV at 20 MHz is the appropriate (usable) 
strength, this is probable the very best way to get your 4MHz osc on freq.

The important thing is to catch WWV on 20MHz when it's about the same 
signal strength as the 5th harmonic of the 4MHz osc. This means NOT 
terribly strong. The closer you can match the two signal strengths, the 
deeper the null you can achieve when zero beating the 4MHz osc. Sometimes, 
if WWV is blisteringly strong, I'll disconnect the antenna and use a clip 
lead in its place... this usually drops the WWV signal down to a level 
which is much more usable.

Of course, don't forget to allow your K2 to warm up for at least 30 minutes 
before you attempt to do any adjustments.

73,

Tom Hammond   N0SS

PS

Wish I could claim to have thought of using the 5th harmonic of the 4MHz 
osc, but that honor belongs to someone else. I just happen to believe it's 
a better way to go.

At 06:32 PM 7/25/03, you wrote:
>Neil:
>I've tried several methods to get my K2 exactly calibrated:
>
>One way is to tune in WWV on CW and use spectrogram to observe the 10 MHz 
>carrier.  If your sidetone is set to 600 Hz, tune the radio until the peak 
>of the carrier is at the 600 Hz marker.  If it doesn't read 10.000.00, 
>adjust it using the method in the manual.
>
>Another way is to use your ears and adjust your tuning until the WWV tones 
>on USB have the same pitch as on LSB.  Since you can only tune to within 
>10 Hz, you may not get exactly the same pitch, but you can get it pretty 
>close.  At that point, note the display frequency and again adjust using 
>the standard method in the manual.
>
>Trouble is, I get slightly different results when I use those two methods 
>and don't understand why.  But we're not talking 300 Hz difference, more 
>like 20-30.  If anybody can explain this to me, I'd be interested.  I have 
>a feeling the second method is more accurate, but don't know why.
>
>73's,
>
>John AA0VE
>
>neil mclaren wrote:
>
>>Hi all
>>
>>i would like to say that #3637 is alive and well     but i cant the tx 
>>and rx frequency are off by 300hz and no amount of tweaking has any efect 
>>on the problem i have done a search on the list (it solved all my other 
>>problems) and have seen some posts about the same fault but i cannot find 
>>a cure
>>
>>
>>
>
>
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