[Elecraft] K2 Cal

[David Robertson]

Nick,

I know you got many responses to your question about frequency calibration on the K2.

I just wanted to give you my slant on this.

When I calibrated my K2, I set up the K2 as a counter. On the tip of the counter jumper cable you built, wrap a little piece of bare wire around the banana plug and attach a clip lead to that wire. Plug the cable (along with wire and clip lead into your VCO output test jack on the RF board. Connect the other end of that clip lead to an external frequency counter.

Note the frequency readout on the counter (the actual readout frequency is not critical) and adjust C22 on the Control Board so the K2's frequency counter's readout is exactly the same as the  external counter. Your adjusting the time base on the controller board to match that of the external counter.

Remove the clip lead and wire but leave the counter jumper wire connected to the VCO test jack. Put your K2 on the 7 MHZ band and Run VCO Cal.
When the VCO Cal is completed, run the calibrations for your BFO offsets and if that external frequency counter was working correctly you will be dead on frequency.

Hope this is not too confusing Nick.

73
Dave KD1NA