[Elecraft] K2 VCO frequency out of range and not changing

[Gareth - M5KVK]

Hi
I bought a K2 kit way way back; started to build it but then got distracted: divorce, moving, re-marrying - you get the picture:-) I’ve finally got back to it and have just started on Alignment 2.

All is well until I check the VCO frequency at P1. It is out of spec and doesn’t change when I spin the dial. The display does, but not the VCO frequency. 

The VCO does change when I change band.

I’ve checked through and the PLL is working, there is data in to the PLL and the VCXO works OK.

It all looks OK, so I’m not sure where to look next. The varactor diodes maybe?

Gareth - M5KVK