Subject: RE: [TekScopes] Re: 2754P to 494AP like conversion
From: "John Miles" <[email-masked]>
To: <[email-masked]>
Date: Mon, 9 Apr 2007 17:11:54 -0700
List-Id: <TekScopes.yahoogroups.com>

Thanks for the hint re: the switches on the Z-axis board (which I'm guessing
is what you meant)... I didn't know that!   Will cc: the list since I'm not
the one doing the conversion...

-- john, KE5FX

  -----Original Message-----
  From: Deane E. Kidd [mailto:[email-masked]]
  Sent: Monday, April 09, 2007 4:17 PM
  To: John Miles
  Subject: Re: [TekScopes] Re: 2754P to 494AP like conversion

  Hi:
     This a tall order to make a 494AP from a 492 or 495 but it can be done.
Has the instrument that you are building been told that it is a 494AP or
does it still think that it is the 495.  In other words, have the dip
switches been set correctly.  In my experience, I have never found a fault
with with the dip switches but apparently some of you have.  I certainly
don't recommend that these switches be changed since these are multilayer
boards and are easily damaged and then not all layers are  connected which
is a worse problem since an external wire will have to be used to make the
connections.  The dip switch on the sweep board is not wired as shown in the
schematic but it is wired correctly to function as desired.  The draftsman
found it easier to show the wires as straight connections but it is sure not
how the circuit works.  He could have just changed the pin numbers and not
had them in order and there would have been no problem.
  Deane

[Non-text portions of this message have been removed]

 
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