[Elecraft] K2 - Problem With KAT2 Installation - SOLVED!

[Peter Barville]

Hi Don

Simple logic on your part, and careful inspection and application of a 
DVM on my part has revealed the cause of the problem.

R6 was mounted on the back of the KAT2 control board, with slightly 
longer than necessary leads, and at some stage the lead closest to the 
edge of the board had been pushed such that it was shorting with the pad 
of U1 pin 1, thereby putting +5v onto the VRFDET line.

Needless to say, I have now re-mounted R6 well away from adjoining pads.

KAT2 is currently still a 'stand alone unit', but rig + KAT2 now powers 
up normally, without full scale S meter deflection. No doubt all will 
continue to be fully functional when KAT2 is mounted back in the lid and 
operational.

Once again, very many thanks for your patience and help.

73 Peter G3XJS (Much relieved)


Don Wilhelm wrote:
> Also you might check the VRFDET signal line on the KAT2 - hint, 
> removing R6 should disconnect the VRFDET signal line