[R-390] for Matt Parkinson only

[pete wokoun, sr.]

Matt,
   I need your email address for some r390A questions.  Please reply.
  All others:  sorry for the bandwidth.

pete



>From: "n4buq at knology.net" <n4buq at knology.net>
>To: r-390 at mailman.qth.net
>Subject: [R-390] Speaking of C709
>Date: 1 May 2006 18:15:23 -0000
>
>The specs call for a 300V capacitor for C709.  I assume this is just
>because this is what was commonly available, right?  With only a few volts
>across the output, is there any other reason to insist on a 300V capacitor
>here?
>
>Thanks,
>
>Barry - N4BUQ
>
> > I'm seeing about 1.8V peak-to-peak, unterminated into my 'scope.
> >
> > The more I think about this, the more I'm wondering if C709 might be 
>bad.
> > Wouldn't this cause low output?  It's spec'd as a 2% so I'm thinking if 
>it
> > has changed, even slightly, it might be causing a problem.  If I recall,
> > C327 (the cap across L230/T207) is of the same type and it has been 
>known
>to
> > cause low output from the 1st crystal oscillator.
> >
> > I haven't found a 510pF, 2% cap yet, though.  :-(   Surplus Sales of
> > Nebraska has them, but they also have a $10 minimum order and I really
>don't
> > need anything else from them right now.  Any sources, anyone?
> >
> > Barry - N4BUQ
>
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