[Elecraft] PLL Reference Oscillator Range Test - Out of Range

[John, KI6WX]

Dennie;
This range will not work in the K2.  The low frequency is about right, but
the high frequency should be very near 12100 kHz.  You need to check the
voltage at pin 1 of U6A.  It should be near 8 volts for the high frequency
reading.  I suspect you will find it is much lower.  If it is near 8 volts,
check to make sure you are getting near 8 volts across D16 and D17.  If this
is normal, make sure that all of the parts around Q19 are correct.
-John
 KI6WX

----- Original Message ----- 
From: "Dennie Mildfeldt" <dmildfel@bellsouth.net>


> Hello to all:
> Have just completed construction to Alignment and Test, Part II.
> When running the PLL Reference Oscillator Range Test,  I get the
> following  readings:
> Ref. High Freq: 12091.28
> Ref. Low Freq: 12086.68
> Range (kHz): 4.6
>
> The manual reads that the acceptable range is 9.8 to 13 kHz. As you can
> see, this is not the case.
>
> When I did the 4 Mhz Oscillator Calibration, I got a reading of 12091.49
> (acceptable).
> I do not have an external freq counter to use. Also, the shortwave
> receiver that I do have does not have SSB so I was going to wait and do
> the WWV calibration method mentioned.
>
> My question....is the 4.6 kHz range acceptable or ????   Any ideas on
> the problem area if this is not acceptable.
> Again, thank you VERY much for your assistance.....
> 73 de Dennie (KC4QNW)