[R-390] Differences in 390A IF decks

[Tom Norris]

The tech manuals mention differences between older and newer 390A IF  
decks, and folks here have, in the past, brought up that older  
Collins decks were different.  Indeed they are.

If anyone wants to add an additional photo to their 390A photo  
collections, below is a link to assorted detail photos just shot of  
an unmodded early Collins IF deck. No dates could be found anywhere.

http://www.fernblatt.net/forradio/R390A/

Just click on the files that start with collins_r390a_IF..... etc
There are a few shots of a fairly late Collins 390A in there as well.
I've only come across a couple of Real Live Collins 390A's, plenty
of the radios made by other contractors.

Feel free to use any photo you wish, and anything else in you find  
stored
on my server. If you click on "parent directory" then go down a bit,  
there
are loads of other images including a directory full of photos of  
Fair Radio's
old place.

The Collins 390A shown in the pics? It's been gone for a year, sorry  
guys.

73

Tom NU4G