[Elecraft] K2 #2555 on air! couple of questions...

[Andreas Hofmann]

Thanks, that did it (got it down exactly to 10,000.00, also the beacons
are now exactly at 14,100.00). =20

I don't think the manual mentions the fact that one needs to re-run CAL
PLL.  Thanks for that hint.

73
DL6UST/W7
Andreas
=20

> -----Original Message-----
> From: Vic Rosenthal [mailto:rakefet@rakefet.com]
> Sent: Tuesday, April 23, 2002 7:36 AM
> To: Andreas Hofmann
> Subject: Re: [Elecraft] K2 #2555 on air! couple of questions...
>=20
> Andreas Hofmann wrote:
> >
> > When I change C22 on the control board, nothing changes on my
frequency
> > display at all.  According to manual page 57, I should be able to
change
> > the Oscillator calibration by changing C22.
> >
> > Steps I did:
> > I have the frequency counter probe connected to TP3.
> > Switched to LSB.
> > I found the WWV signal at 10,000.51 ( I guess it is supposed to be
at
> > exactly 10,000.00)
> >
> > Should I desolder C22?
>=20
> No!  What you need to do is note how much WWV appears to be off (you
are +
> 510
> Hz).  Connect the probe to TP1, switch to CAL FCTR and adjust C22
until
> the
> reading is 510 Hz LESS than it was before.  Then do CAL PLL and CAL
FIL
> again.
> You MUST rerun these procedures after changing C22 to see the changes.
> Then
> look at WWV again -- you should be closer.  You might have to do this
more
> than
> once.
>=20
> 73,
> Vic, K2VCO
> Fresno CA