[Elecraft] Low sensitivity and low power calibration failure

[OE5CSP-Chris]

 I still have problems with my K3.The sensitivity is very low and I
 can´t do the low power tx calibration.
I loaded the latest
firmware and checked all the settings again and
again.
 Gary Surrency, from the elecraft support, suggested to do a few
measurements.These are the results.A friend
helped me, because I don´t have an rf-probe myself.The results are at the
 end of this page!
 Garry is on a trip and he´ll be back on Thursday, so he can´t help me
now.I´ve got enough time to do some repair work and any help would be
appreciated.

> >
> > 111mV RMS at the center pin of coax jumper from the KREF2 board, that
> goes into RF board connector J65.
> >
> > 37mV RMS on the right pin on both sides of the crystal filter pins.
> >
> > 346mV RMS at the BPIF jumper to the left of the KNB3 board.
> >
> > 189mV RMS at jumper W4 near the KIO3. This may be a jumper wire that is
> plugged into J64A on later sn. K3s.
> >
> > 176mV RMS at P71A pin 3 on the LPA.This is near the left rear of the
> LPA, right across from the KIO3 board. Pin 1 is to the rear.
> >
> > 15.5V RMS at P71C pin 1 on the LPA. This connector is at the rear of the
> LPA board. Pin 1 is on the left.
> >
> > Examine the parts and connections under the RF Board in the bandpass
> filter area, to see if there are any poorly soldered or damaged parts.
> >
> >
> > My results:
> > Board connector J 65 shows 35-40mV. All other measurements were 0.
> > My friend thinks it´s maybe a problem with the 2nd mixer.We also looked
> for damaged parts but we could not find any.
> >
> > Can you help?
> >
> >
> > vy73 Chris-OE5CSP
> >   
> 
> -- 
> 73 Richard AD7FZ
> Elecraft Support
> support
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