[Elecraft] PLL Reference Oscillator Range and VCO Test

[Dickie M0AUW]

Hi,
I’m currently assembling my K2 but am stuck on the PLL reference Oscillator
test.

In the frequency counter mode with the probe attached to TP3, I get a
reading of 12099.03 kHz, when pressing band + I get 1298.99, Pressing band –
I only get 00.467 to 00.475 changing rapidly. (Perhaps the probe is playing
up but seems to work with other tests?)

However, with an external frequency counter attached I get 12099.00 and no
change when pressing band +, but when pressing the – I get 11500 varying to
11700 at high speed.
I’ve checked solder joints around that area in particular at R19, RP2, L31,
D16 and D17 and at U6 pin 5 am getting 3.90 volts.

Also on the VCO test I am getting a reading of 7738.64 but I suspect this
will be out due to the PPL test?

Any help would be much appreciated – 73s Dick M0AUW




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