[R-390] Green Grears

[Flowertime01 at wmconnect.com]

Tom,

When used to lock up the RF deck gear train for removal, the gear
always went in the same place.

There are several 6/32 taped holes in the R390 gear train frame. At least two 
of them
will hold the green gear without getting in the way when not in use. Us 33's 
would use what ever location got under our hands first. Where you find a gear 
mounted today is no clue as to how it was factory assembled. There are some 
old TM graphics that show gear storage location.

The original R390 TM was photographed from an original production first run 
Collins. Later changes to the TM were mostly to correct text (and add a few 
missing sections). The photos did not change. I do not think we can infer 
anything sacred about the receivers from the location of the gear.

I do not have my R390 TM at hand, Its still packed in the moving cartons. 
There are differences in the RF deck caps that were added in later production 
runs. If someone has a TM they may be able to list them for you. There is a short 
note paragraph in the TM that list what was added when. You can look at your 
RF deck someday and see if it was real early production Collins or a later 
production run.

Roger KC6TRU