[Elecraft] K2 Transmitter Alignment

Tom Hammond [email protected]
Sun Jan 25 22:56:00 2004


Hi Joe:

>In the BPF stage where K4 has been removed it is easy to check that no 
>capacitors are shorted to ground.  Probes across C20,22,24 confirm they 
>are not shorted.  C22 in my kit was a 2.7 puff, not 3.3 as on the schematic.
>
>All C values are correct and installed with no solder bridges.  C21 & C23 
>bodies had a red dot, so they should be ok at 50pf.
>
>Only thing I can't check is L8 and L9 which are of type TI005.  Or maybe I 
>can check if I knew how.

There are seven (7) pins on the T1005 inductors... (referring to L8, as 
viewed from the bottom of the RF board)

          0
    o           o

                o

    o           o
          0

The two larg(er) pins are ground lugs, connected to the tin case.

The two smaller pins, on the left, are (in this case) not connected to 
anything insude thge inductor case.

The three smaller pins, on the right, are the 'business' pins. In this 
case, I don't think the middle pin is used, but the two outside pins are 
connected to the inductor itself. THESE are the two pins you can 'ohm out' 
to see if all is OK there.

Good luck,

Tom   N0SS