[R-390] Sweep Generator Alignment

Wed, 11 Sep 2002 08:14:05 -0400

To clarify, inject the nominal 455 kHz sweep via the grid test point of =
the mixer prior to the IF. Thiis allows the IF deck to see its correct =
impedance on the input for correct alignment of the mixer and the first =
IF stage.
If you are lucky you can use a storage display specan on the IF output =
to see the result, or as previous posts have suggested, the diode load =
voltage to an o-scope is a more universally practical method. In a dim =
light you should be able to see the longer persistence trace on the =
scope.
    Les K1YCM/3

-----Original Message-----
From: Veenstra, Lester B. [mailto:[email protected]]
Sent: Wednesday, September 11, 2002 8:01 AM
To: David Faria; r-390
Subject: RE: [R-390] Sweep Generator Alignment

Yes if it can do a slow stable sweep and you have a useful way to see =
the result of that slow sweep.
Inject via the grid test point of the mixer prior to the IF.
      Les K1YCM/3

-----Original Message-----
From: David Faria [mailto:[email protected]]
Sent: Tuesday, September 10, 2002 10:36 PM
To: r-390
Subject: [R-390] Sweep Generator Alignment

GE List.  Would there be any benefit to aligning the IF of a 390a or non =
"a"
using a sweep generator?  If so how would one be connected?  I have an
opportunity to pick up a 4mhz sweep/function generator.

thanks for the comments
Dave Faria
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