[R-390] Cleaning?

[Llgpt at aol.com]

If it has a silver look with no trace or almost no trace of alodine, it is  
more than likely a 67 EAC. They had the crappiest coating of alodine of all the 
 R-390A's built.
 
Les Locklear
 
 
In a message dated 7/4/2005 9:00:29 AM Central Daylight Time,  
shoppa_r390a at trailing-edge.com writes:

> The  aluminum was chemically treated to protect the aluminum
>  [anodizing/alodyning]

It's just a single data point, but my yellow  striper shows zero sign of
anodizing/alodyning on the side panels.   The back plate, internal plates,
and modules all were alodyned/MFP'ed and  have a yellow sheen or a dull
yellow coating.

Is there any way to  definitively identify the maker of a mainframe,
as opposed to the  modules?  Or is it just commonly assumed that the
RF deck usually  stays attached to the mainframe?

One of my R-390A's seems to have had  the B+ fuses retrofitted.  Does
this narrow down the range of possible  makers/contracts?

Tim.