[R-390] Technical Question somewhat related to R-390s

[Barry]

Went home for lunch and tried this with some high-value series resistors.  Works just fine.

Now to figure out why that secondary will not peak when in the circuit...

Thanks guys!

Barry - N4BUQ


 On Thu 20/01/11  8:52 AM , Barry n4buq at knology.net sent:
> > Yes, Barry.
> > 
> > You've got the explanation exactly right. The
> function generator has a> lowimpedance - probably 50 Ohms - maybe even
> less.> 
> > This kills the Q of whatever side of the
> transformer it's connected to.> 
> > To avoid this, connect a resistor (anywhere from 1k
> to 10k) in series> withthe function (or signal) generator.
> > 
> > Of course, this will substantially reduce the input
> level to the scope.> 
> > Miles B. Anderson, K2CBY
> 
> It's funny.  I was writing the original email and it wasn't until I was
> almost finished with it when the "aha!" moment occurred to me and I wrote
> that last paragraph.
> Thanks for the reply and confirming what I thought might be the
> problem.
> 73,
> Barry - N4BUQ
> 
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