[ARC5] Request for help, aligning BC-453-B.

[Leslie Smith]

I wish to align the front end in my BC-453-B

DOCUMENTATION.
The procedure for aligning is described in the document NAVWEPS
16-30ARC5-501
I put a copy of this document in Yahoo Groups, Files, ARC-5 Articles &
Refs.

The file name is:  ARC-5_Test & Alignment, NAVWEPS_60-30.pdf  (My name
for above).
See section 3 for detail.

I include one page from that document, with extra info I added:
It's called:  "ARC-5, Alignment info sheet.jpg"
It's in the same folder.  That sheet shows the physical location of each
adjustment point.  I added a table showing the specific frequency where
an adjustment can be made.

On the ARC-5 Yahoo group site, you have access to the info I'm using.

SETTING THE MAIN DIAL.
The "pip" on the main dial was broken, so the in first step I set the
sig gen to 500kHz, and tightened the nut holding the main dial.  Maybe I
should have done that at 200kHz, not 500kHz?

ALIGNMENT.
According to these documents, I align C4E at 520kHz (that worked)
At the low end of the band I touch C-9 at 210kHz.  (Here is my trouble.)
      <--- TROUBLE HERE --<

Here is the problem.  I always understand alignment touched 'caps' at
the high end of the band, and coils at the low end of the band.  That's
not what this book says.  It says trim C-9 at 210kHz.  OK, When I swing
C-9 from max to min pFs, I change the frequency very little.  If I set
the '453 dial to 200kHz, my signal generator reads 191kHz.  In other
words, at the low end I'm almost 10 kHz 'off'.

 Maybe I should have set the dial at the 'bottom' end (200kHz) and then
 trimmed at the top end of the dial?

Any help welcome.
Or, stated more precisely, help!


Les

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