[R-390] URM-25D recap.

[Jim Temple]

Hello to the list,

I picked up a URM-25D at Dayton this year.  This unit had the typical loss
of modulation described in many of the messages posted in the archives.
Upon inspection, ALL the large paper caps located on the modulation board
were physcially wet with a slick discharge from the innards of the caps.  So
I obtained replacements and installed new caps as recommended in the
archives.  I even broke open the case and replaced all the similar paper
caps located on the various internal modules, which were also wet with a
discharge.  Upon reassembly, all functions work as intended, and after a few
hours warm up, the stability of the unit is rock solid.  Now on to my
question.

Question:

In the lists experience, is a recalibration necessary after recapping this
unit?  The frequency alignment seems to be quite good.  But I am uncertain
about the calibration of the voltmeter function.  I have the Navy manual for
the URM-25D, but am interested in tips on calibrating the voltmeter
function.  For instance, 2.0 volts are mentioned as an approximate value at
the RF output jack.  Is a RF voltmeter required for this measurement?  Is
this voltage a DC voltage?  Any help here?

Thanks for your past support.

Jim