[R-390] R-390 ID

[R390rcvr at aol.com]

Al:
 
Some modules are pretty easy. The power supply has a small metal tag  riveted 
to it, which will have the name on it. The others aren't as clear cut. I  
have three apart on the bench right now, and so far most of the modules don't  
have a manufacturer listed. I suspect they are Collins units, and that probably  
the Motorola units will have the Mfg. on them.
 
The three rigs I have all have Collins front tags, but as we know they can  
be switched around. According to Tom Marcotte, N50FF, there were 17011 R-390s  
made, based on high serial numbers. 6364 were made by Collins, 8401 were made 
by  Motorola for Collins, and 2246 were pure Motorola. 
 
I believe all of them used Collins PTOs, but I could be wrong.
 
The module swapping doesn't seem to be quite as rampant in the 390 compared  
with the 390A.
 
If you have more questions, lets hear them.
 
Randy Stout