[R-390] Orange Drop vs ceramic disc

[Ben Loper]

I may try something this weekend.  I have an HP audio osscilator and a two
trace scope, so maybe just start feeding a signal through a cap and watch on
the scope.  I don't remember the top end but I think 20 khz for the audio
oscillator.  I can listen also but my ears crap out at about 10 khz last
time I checked..

On Fri, Apr 1, 2011 at 9:36 AM, Barry <n4buq at knology.net> wrote:

>  On Fri 01/04/11  9:05 AM , rbethman rbethman at comcast.net sent:
> > The difference in performance between the two R-390A/URRs that you did
> > have so many variables that it is impossible to say why.  Could be the
> > difference in alignment, methodology of restoration, or different
> > manufacturer of the actual radio.
> >
> > You have been using HP equipment lately.  What did you use before that?
>
> At that time, I was using an HP410B, a General Radio GR1001A with a Fluke
> 1920 counter .  The 1001A was replaced with an HP606A and now an HP8640B.  I
> still have an HP410B and an HP410C.
>
> Barry - N4BUQ
>
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