K2 AGC/S Meter

[Tim Rife]

Building K2 S/N 6430 and at page 48, AGC and S meter alignment.  I can only
get a maximum of 3.60V from the pin 5 of U2 with R1 set at its ccw limit.
Additionally, for S meter alignment, both CAL S LO and S HI I am not seeing
the LEDs illuminate at all with either dot or bar settings.  All other tests
up to this point have worked as described.  Any thoughts on where to look?

 

Thanks,

 

Tim

KK9T

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[Don Brown-4]

Hi
 
This is usually caused by the 8 volt regulator output on the low side of its tolerance. Check the 8 volt supply if it is low say around 7.5 volts ask support to send you a replacement. In the mean time just go ahead with the build the agc and S meter are finalized later in the alignment.
 
Don Brown
KD5NDB



> From: [hidden email]> To: [hidden email]> Date: Thu, 13 Mar 2008 08:36:55 -0400> CC: > Subject: [Elecraft] K2 AGC/S Meter> > Building K2 S/N 6430 and at page 48, AGC and S meter alignment. I can only> get a maximum of 3.60V from the pin 5 of U2 with R1 set at its ccw limit.> Additionally, for S meter alignment, both CAL S LO and S HI I am not seeing> the LEDs illuminate at all with either dot or bar settings. All other tests> up to this point have worked as described. Any thoughts on where to look?> > > > Thanks,> > > > Tim> > KK9T_______________________________________________
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