[Elecraft] K2 PLL Range of 17.78

Bill Hegardt bill at hegardt.com
Sun Jul 25 16:35:20 EDT 2004


I'm building K2 SN 3941 and while performing the PLL range test, I get a 
high frequency of 12099.86 and a low frequency of 12082.08 which works 
out to a range of 17.78. Since this is outside the normal range of 
9.5-15, I'm wondering what I should do.

I've checked the components  D16, D17, C84, C85, and L31 as mentioned in 
the troubleshooting section, and they appear to be correct.

I have left the adjustment of C22 till later. I don't know if this could 
have an affect or not. Do I need to check that C22 is at its mid-point?

Searching the mail list archives on this problem, I found a post that 
suggested T2 might have an effect on this range. Is this correct? My 
windings might
not quite cover 85% of the core, but I have not tried rewinding the 
toroid yet.

Any suggestions for my next step to resolve this?

73,   Bill    K6WIL



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