[Elecraft] K2 Changes modes when pushing A/B

[Don Wilhelm]

John,

Thanks for the reminder about the pullup resistors - check RP1 to be 
certain pin 1 (the end with the dot) is at the same end as the "1" 
silkscreened on the board.  Most of the R-paks in the K2 can be swapped 
end for end, but not that one.

73,
Don W3FPR

On 7/30/2011 3:49 PM, John Oglesby wrote:
> Don - Thanks for the e-mail.  I didn't clean the board, so that's OK.
> After I got your email, and the response of the reflector seemed to say
> that this isn't a common issue, I started to look at the schematic
> around U3.  What I did notice is that the two switches share a common
> data line (D4) to U2. There could be an issue with the pull-up voltage
> on that line which might make if flaky across the Bank 1/Bank 2
> transition.  So I will take the K2 apart and check U2, U3 and the
> resistor bank on D4.
>
> Thanks for the suggestions.
>
> 73
>
> John
>