[Elecraft] Problem setting AGV Threshhold

[Matthew Denson]

Hi All,

I am building my K2 and have reached the initial checkout steps before building the receiver.

On page 48 of my manual (Rev G if that matters) the instructions say to "Adjust R1 for a reading of 3.80...."

On my K2 the way it is right now the range of voltages I get by changing R1 is 2.1-3.28Vdc.  Hmmm?

I looked at the schematic on the way to work today (I'm still there) and it doesn't look like there are that many variables here.  It is a simple voltage divider of the 8v regulated voltage to ground as far as I can see and it seems like the max voltage should be 1/2 of 8V when R1 is completely shorted out.  I haven't checked the 8V source cause I haven't been back home.  

Maybe extra useless info - I don't know how the internal volt meter works but it is reading out correctly (that is I get the same reading as my DMM where I have made identical measurements) so I assume that the 5V regulator is working right.

Any thoughts on which points to check?  Is my reading of the schematic too simplistic?

73,
Matthew




      ____________________________________________________________________________________
Fussy? Opinionated? Impossible to please? Perfect.  Join Yahoo!'s user panel and lay it on us. http://surveylink.yahoo.com/gmrs/yahoo_panel_invite.asp?a=7