My problem with K2

[Vincenzo Calandra]

Hi all,

I have build KX1 and K1 with no problem but with my (sn. 6871) K2 i'm in
trouble.

No problem with control board and front panel.

I've performed the test of part II:

4 Mhz Oscillator calibration is ok.

PLL reference oscillator range test is ok (Fup = 12099 Mhz - Fdown =
12086 Mhz - range 13 kHz)

VCO test = 7834 Mhz (???)

VCO alignment = no 6V at left of R30! Only 0.018V... and non change
adjusting L30. :-(

I rewind T5 and verified "RP3" (PLL upgrade kit) with non change.

Any one can suggest anything?

Many tanks in advance for al reply!




Vincenzo Calandra ([hidden email]) - IZ5GVP



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[Don Wilhelm-4]

Vincenzo,

Do you have the 'rework eliminators' installed?  If so, you changed C71
to 120 pF, and you must also change the secondary menu entry for D19 to
"Y".  If you do not have the rework eliminators and you have not
attempted to put in the capacitor change for C71 associated with the
K60XV option, then check the value of C71 - it should be 82 pF.

What frequency was indicated in the K2 display when you measured the VFO
frequency at 7834 kHz?

73,
Don W3FPR

Vincenzo Calandra wrote:

> Hi all,
>
> I have build KX1 and K1 with no problem but with my (sn. 6871) K2 i'm in
> trouble.
>
> No problem with control board and front panel.
>
> I've performed the test of part II:
>
> 4 Mhz Oscillator calibration is ok.
>
> PLL reference oscillator range test is ok (Fup = 12099 Mhz - Fdown =
> 12086 Mhz - range 13 kHz)
>
> VCO test = 7834 Mhz (???)
>
> VCO alignment = no 6V at left of R30! Only 0.018V... and non change
> adjusting L30. :-(
>
> I rewind T5 and verified "RP3" (PLL upgrade kit) with non change.
>
> Any one can suggest anything?
>
> Many tanks in advance for al reply!
>
>
>
>
> Vincenzo Calandra ([hidden email]) - IZ5GVP
>
>
>
>  
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>
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