[R-390] A tale of two IF decks.

[Joe Foley]

--- rbethman@comcast.net wrote:
> I noticed a couple of other differences between an
> early Collins IF - S/N 35
> vs. a '67 EAC IF.  The Collins Z503 and the like do
> NOT have holes in them
> to allow adjustment.
> 
> The early Collins IFs that I saw WITH holes, were
> obviously NOT done at time
> of manufacture.  It is easy to see that they were
> drilled out later.  They
> usually have "flashing" around them.
> 
> I am guessing, but it was probably done at a later
> date to align them.
++++
This is covered in the manual!

The first step to doing an alignment is to punch holes
in those cans.

Joe

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