Clark,
The 9.050 frequency is not coming from the 4 MHz reference oscillator, but
from the PLL Reference oscillator.
Since you have a separate receiver and have its antenna wire wrapped around
the 4 MHz crystal - tune the receiver to 4 MHz and adjust C22 until the
frequency received is exactly 4 MHz. You can use an alternate method later
to calibrate the 4 MHz oscillator after you can receive WWV. Getting it
approximately on 4 MHz is all that is required at this point.
Now, the real question is - why is the frequency that you are reading 9.050
instead of in the vocinity of 12.090? That frequency is coming from the PLL
Reference Oscillators with a crystal at 12.096 MHz. Since you can hear the
same frequency on your separate receiver, I have to believe it is a real
oscillation, and the probe is not to blame.
Look at the Schematic sheet 1 of 4 in the upper left corner you will see the
PLL Reference Oscillator (the components to the left of U4). Check all
these associated components for good solder connections and proper values.
73,
Don W3FPR
> -----Original Message-----
>
> Hi guys,
> Went through and went over every solder joint. Took several hours, but
> now I get a reading on the Freq Probe at TP3 for the 4.000 MHz adjustment.
> Problem is: It reads 9.050 MHz, and I can get the tone on my
> other receiver
> (@9.050) with the antenna wire wrapped around the 4MHz crystal on the
> control board. Any ideas?
>
> Thanks,
> Clark
>
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