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" <[EMAIL PROTECTED]>
To: "Harvey Howell" <[EMAIL PROTECTED]>;
<[email protected]>
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: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Harvey Howell
Sent: Tuesday, May 30, 2006 9:53 AM
To: [email protected]
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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