[R-390] Differences between the various URM-25 generators?

[Tom Norris]

I've seen the "F" model with the flat panel, and I have a Trad SG-25  
with a brushed metal front but otherwise appears to be identical to  
the "B".  The one manual I downloaded from LOGSA ages ago "says" it's  
for the URM-25B, but the unit in the manual bears little resemblance  
other than general circuit description.  What other variations were  
there?

73

Tom NU4G