[R-390] r-390 Army manual mods

[face at netunltd.com.au]

"Hi everybody !"   (a' la Dr Nick Riviera)
 
 
R-390A MANUAL:
 
A QUERY:  My manual is the Army version TM 11-856A  (stamped ME 147+ O2a
inked in) Jan 1956.
(odd that it came with a supposedly  NAVY  R-390A !)
It has been much annotated and seems to have been used for shop
maintenance work.
There are  inked in additions to the diagrams and some typed inserts
replacing 'x' d out pictiures.
 
QUERY:  I have a page (original page from a different manual) inserted
between pages 108 and 109
(covers Fig 64  .. IF sub chassis, top view  and Fig 65, bottom view.)
The inserted page (is) pages 3 , obverse 4  , showing the same sub
chassis, but with obvious photo differences.
The inserted page  has the reference  'TAGO  6903A '  on the bottom.
 
The photo references are TM856A-34 and TM856-35 (original manual) and on
insert TM856A-C4-1
and TM856A-C4 ???  (final bit obliterated by cigarette burn... so used
as maintenance manual for sure !)
 
The insert shows some major differences to the original layout..Example:
It shows a bunch of 4 trimmers
on FL502 marked C513,C358, C571, C512.
 
When I can get another more abled body  body to help me take my R-390A
oiut of its rack,(got no slides)
I will  then see if mine looks the same.
 
Until then, can anyone tell me the relevance of this , please ?.
i.e. Are the added  trimmers a later and necessary mod ?
     Are there differing versions of the mech filters / and or tuning
methods in these things?
     (I have an IF alignment sweeper somewhere that doesnt load things
much when hooked up..
     looks like I may have to use it .....is sweeping the IF the best
way to align ? .. usually is)
 
ADDENDUM:   Seems its likely all this has been reviewed by you guru's
before ...   To save everyones time re cycling the wheel,
if there's  previous links to any of this, how do I get on to them?
(I'me an internet novice).
 
 
Regards all
John Byers