[Elecraft] K2 VCO Alignment only 0.02V @ R30

[Don Wilhelm]

Jeremy,

That 5 volts at U4 pin 13 is higher than normal, and is the reason you 
do not have any control over the frequency of the VFO.
Make certain the path from the VFO output through C62 to U4 pin 4 is 
intact with good soldering all the way.   Check the value of C62 (0.01 
uF marked 103).  Make certain pins 5, 6 and 7 of U4 are properly 
soldered.  Do the DC voltage checks on U4 and let me know the results.

73,
Don W3FPR

On 2/2/2013 6:42 PM, JeremyJones wrote:
> U4 pin13 = 5.029V
> U6 pin6 = 5.026V
> U6 pin7 = 0.020V
>
> L30 with 1 red lead removed = 0.5ohm
>
>
>
> --
> View this message in context: http://elecraft.365791.n2.nabble.com/K2-VCO-Alignment-only-0-02V-R30-tp7569523p7569545.html
> Sent from the Elecraft mailing list archive at Nabble.com.
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>