[Milsurplus] AN/URM25-J

[Mark Richards]

Among the pile of Dyna-Swill I find two URM25 signal generators. Needing 
the services of one I find that neither of these has any RF output 
although both show meter indication that they are generating.

One unit is marked SG85/URM-25D on both the case and the front panel.

The other is marked SG85C/URM-25D on the front panel and AN/URM25J on 
the case.

I find in BAMA the manuals for the 25D, but not the 25J.

And these units are slightly different.  The 25J has an extra phenolic 
board on which are mounted 2 capacitors, 2 rectifier diodes, and a Zener 
diode.  The zener looks to be fried.

Perhaps I should quit while ahead.. or maybe someone knows the mysteries 
of the 25J?

/K1MGY