[Elecraft] K60XV Problem

[Mark Bayern]

Harvey,

I found that I could adjust the VCO voltage to keep the VCO in lock at
5MHz -- however, I have yet to copy WWV at 5MHz.  And, I did get that
'buzz saw' sound when the VCO is not in lock.  Good luck -- if you
find you can copy WWV at 5M, please let me know about it.

Mark



On 5/30/06, Harvey Howell <h.r.howell at worldnet.att.net> wrote:
>  Thanks Don. I think the VCO voltage is too low at 5000kHz. At 5300 kHz it
> reads 1.084 vdc on my Fluke 179. I will have to go back to the adjustment
> routine in the K2 manual and see if I can shift all the voltages enough. On
> my previous K2 it worked great at 5000kHz. The buzz saw sound to me is like
> hearing some internally generated low frequency and nothing else. The
> frequency changes a little bit when I attach the DMM lead to R30. Thanks for
> your help.
>
> Harvey KN6VP
> ----- Original Message -----
> From: "Don Wilhelm" <w3fpr at earthlink.net>
> To: "Harvey Howell" <h.r.howell at worldnet.att.net>;
> <elecraft at mailman.qth.net>
> Sent: Tuesday, May 30, 2006 7:23 AM
> Subject: RE: [Elecraft] K60XV Problem
>
>
> > Harvey,
> >
> > Re-check the VCO range (voltage on the left end of R30), and be certain
> > all
> > the ands fall within the proper range.  It is normal for the VCO voltage
> > to
> > become so small below 5300 kHz that the tuning will not continue on down
> > to
> > 5000 Hz.  Also the response of the bandpass filter may fall off quite a
> > bit
> > at 5000 Hz which will reduce the ability to hear at that frequency.
> >
> > I cannot speak to your 'buzz-saw' - you will have to be more specific.
> >
> > 73,
> > Don W3FPR
> >
> >
> >> -----Original Message-----
> >> From: elecraft-bounces at mailman.qth.net
> >> [mailto:elecraft-bounces at mailman.qth.net]On Behalf Of Harvey Howell
> >> Sent: Tuesday, May 30, 2006 9:53 AM
> >> To: elecraft at mailman.qth.net
> >> Subject: [Elecraft] K60XV Problem
> >>
> >>
> >> Hello everyone. I installed a 60 meter board last night and it
> >> seems to have a problem. When I entered 5000 kHz I had what
> >> sounds like a loud oscillator sound on the audio. I turned on
> >> another radio and had WWV loud and clear at 5000 kHz in that
> >> radio. When I increase the frequency the oscillator sound goes
> >> away (maybe just beyond my hearing) and I hear a very faint sw
> >> station at 5070 kHz. Between 5070 kHz and 5300 kHz I can't hear
> >> the buzz saw and I adjusted the trimmers for max power out. I'm
> >> not getting any error messages on the display. So far I haven't
> >> found any visible assembly errors. Has anyone had this problem
> >> before? Any ideas what might be bad? On a previous K2 I built
> >> with this option I heard WWV right away at 5000 kHz. Thanks very much.
> >>
> >> Harvey KN6VP
> >
> >
> >
> > --
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> >
> >
>
>
>
> --
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