[Elecraft] K2 sn 5486 needs some help!

[John [K7SVV]]

Don,
     Well, I'll be a monkey's uncle.  You hit it right on the head.  C73 is
a marked as a 471.   Thank you!

John   [K7SVV]


On 4/30/06, Don Wilhelm <w3fpr at earthlink.net> wrote:
>
> John,
>
> All bands look OK except 40, 30 and 15 meters.  So the PLL is working, and
> the VCO is working.
>
> That would indicate that you most likely have something wrong in the VFO
> Range selection area - either a relay or a capacitor.  Check C73 first
> because it is common to all the failing bands and not used on any other band
> you have installed - be certain it is 47 pF (marked 470) and is well
> soldered the frequency you report sounds suspiciously like you soldered a
> 470 pF capacitor (marked 471) at C73.  Also check the soldering for relays
> K13, K14 and K15.
>
> Solve this problem first before moving on to anything else like CAL
> PLL.  The frequency you need to read at TP1 when the K2 is tuned to 7000 kHz
> is somewhere close to 11915 kHz.
>
> 73,
> Don W3FPR
>
> > -----Original Message-----
> >
> > Everything was normal until I got to "VCO Alignment" in part 2.  Prior
> to
> > filling out the "VCO Voltage Readings" table, I was told to
> > change bands to
> > 80 meters and set the VFO to 4000 kHz and to adjust L30 for 6
> > volts at R30.
> > Everything was great. Adjusting L30 felt good and lots of range but when
> I
> > measured the voltage at R30 for the other bands, things didn't look so
> > good.  Here is what I measured.
> >
> > 80m  2.4 and 6.0
> > 40m  7.9 and 7.9
> > 30m  7.9 and 7.9
> > 20m  2.4 and 4.1
> > 17m  3.1 and 3.3
> > 15m  7.9 and 7.9
> > 12m  4.0 and 4.4
> > 10m  3.3 and 4.1
> >
> > As you can see, the voltages are a bit high.  The instructions say that
> I
> > can adjust the range up and down by tweaking L30 but it has no
> > affect on any
> > band except 80M.  The frequency at TP1 is 6828.xx and it does not change
> > when the VFO knob is changed.  CAL PLL results in an INFO 232
> > message.  Does
> > anyone have any idea where I should start?
> >
> >
> > --
> > John   [K7SVV]
> >
>
>


--
John   [K7SVV]