[Elecraft] K2 RECEIVER: WHERE ARE THE SIGNALS?

[Don Wilhelm]

Manuel,

Sorry, I had understood (incorrectly) that you had a signal at C225, but if
not, there is something between your good D3, D4 junction and C225 that is
bad.

Check C114, Jumper W1 (or your unmodule at the 160 meter position and the
header), and relay K12.  There are no other components in the path (unless
the anode of D4 is shorted to ground or failing to receive voltage through
RFC3 during receive.

73,
Don W3FPR

> -----Original Message-----
>
> Don:
>
> By the way: when I get to C225 the signal disappears. I have
> signal through
> the junction of D3 & D4. Therefore no signal on C225, C226 and C227.
>
> I checked the toroids and they are ok. I forgot to mention I
> purchased the
> full set of toroids from the "Toroid Guy" and they look
> impeccable. I might
> have ruined some of them with my soldering though...
>
> Let us see if I have this correctly: looking down on the RF board
> I made a
> continuity check from the left side component lead of C225 to the
> back lead
> of C227. Is this correct?
>
> Thank you
> 73
> Manuel
> LU5OM
>
> ----- Original Message -----
> From: "Don Wilhelm" <w3fpr at earthlink.net>
> To: "Manuel Wilches" <manuelwilches at arnet.com.ar>;
> <elecraft at mailman.qth.net>
> Sent: Saturday, February 25, 2006 12:16 AM
> Subject: RE: [Elecraft] K2 RECEIVER: WHERE ARE THE SIGNALS?
>
>
> > Manuel,
> >
> > If you can receive a signal with an antenna connected to C225, but not
> > C226,
> > or 227, your most likely problem is improperly tinned toroid leads on
> > L25 -
> > but check L26 while you are working in that area.
> >
> > A quick check is to make a continuity check from the top end of C225 to
> > the
> > top end of C227 - if you measure much more than zero ohms, the
> toroids are
> > not properly tinned and soldered.
> >
> > 73,
> > Don W3FPR
> >
> >> -----Original Message-----
> >>
> >> I tried N0SS's probe and I pick up a strong signal through all
> >> test points
> >> up to C225. I have no signal pick up there nor at C226 or
> C227. I did not
> >> check W6 and W1 because I did not install those jumpers (I followed the
> >> Rework Eliminators instructions that call for other steps). I do
> >> not know if
> >> there is an alternative test point for those. I have been through
> >> the usual
> >> checks for bad solders etc.
> >>
> >> I have used the proper solder and a controlled temp soldering station.
> >>
> >> I would very much appreciate your assistance and guidance. I have
> >> had the K2
> >> on for hours now (playing with the keyer) and there has been no
> >> change. It
> >> looks great, that is for sure!
> >>
> >> Thank you very much
> >> 73
> >>
> >> Manuel
> >> LU5OM
> >> CT4IK
> >> K2 # 5310
> >>
> >
>
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