Hi Andrew,
Yes, place that 2.7KΩ resistor across RP2 pins 7 & 8. This resistor is
on the output of U6A to drive the varactor diodes in the PLL Osciillator
circuit. It was changed to 2.7K in Rev B. In Rev A it was 100K and part
of RP2, so you are just placing a 2.7k resistor in parallel with the
100K on RP2 P& and P8. I believe the change was to help add stability to
the PLL Oscillator circuit.
73,
Dave, W8FGU
On 7/21/2022 11:04:58 PM, "Andrew Moore" <andrew.n...@gmail.com> wrote:
I just installed the temperature compensated PLL reference upgrade kit on
my K2 #892.
From everything I can see, this rig (which I bought used) has been brought
up to date in almost every way.
One step in the assembly instructions says that for S/N < 3000, make sure
I've installed the BFOMDKT upgrade, and that the kit includes a 2.7k
resistor R19 that's soldered across pins 7 and 8 of RP2 (according to
document "Upgrading the Elecraft K2 to Revision B").
My RP2 (10K) has no resistor across any pins. However, I do have L33
upgraded to the prewound 41 uH inductor, which I think was part of the
BFOMDKT.
Should I be adding 2.7k across pins 7 and 8? Is there any reason this would
not have been done as part of the BFOMDKIT upgrade?
Thanks,
-Andrew NV1B
..
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