Fw: Re: [Milsurplus] URM-25D vs. URM-25F

[windy10605 at juno.com]

As others have commented, it depends ..... I've had several D and F
versions and wrote up some repair info on my web site. The comments about
the paper capacitors are very true, I've pulled them out still oozing
goo. My preference is the F model because it's easier to read the dial.
but since there seem to be more D models out there most people end up
with a D. The F also has a greater tendency to have intermittant drum
contacts on a particular band (my observation). I've found Fs and Ds with
defective repair work (unsoldered joints, wrong tube, smashed tube pin,
etc). But everything considered, it's still a darn nice SG and can be
found. Not as cheap as a $10 BC-221 but still inexpensive.

73 Kees K5BCQ


--------- Forwarded message ----------
From: Barry Hauser <barry at hausernet.com>
To: David Edsall <dedsall at crocker.com>, milsurplus at mailman.qth.net
Date: Thu, 10 Jun 2004 22:23:53 -0400
Subject: Re: [Milsurplus] URM-25D vs. URM-25F
Message-ID: <034201c44f5b$24c00a00$6d0aa8c0 at v2premiere>
References: <20040610231627.C5AD0859DD2 at mailman.qth.net> 
        <40C8FED1.7020905 at cox.net> <004901c44f54$4b826360$2466ba8c at ppp>

I dunno, Dave ...

Have or had several of the alphabet -- C, D and F.  There are supposed to
be
some differences of possible significance.  I think all three are prone
to
at least have the modulation go flaky -- needful of a few cap
replacements.
The F has a flush panel and, as I recall, is easier on dial bulb
replacement.  The others have those integral thumbscrew lamps.  I recall
borrowing one from a unit to swap into another.  The clearance wasn't the
same and as I screwed it down tight, the bulb apparently hit the edge of
the
dial and broke.  Of course, you really don't need the bulbs unless you're
fond of doing full blown alignments in the dark.

Well, that's superficial -- there are more significant design
differences,
but I forgot what.  If I'm not mistaken, two of the models are closer,
though skip letters, i.e. the F is a reprise of the C?  Or it was some
other
pair?

In general, 40-50 years after the 90 day warrantee ran out on 'em, I
think
the quality/results would be more of an individual condition thing rather
that correspond much to just what letter it is.  Some may have been
treated
to one or more overhauls by the military, and some may have been serviced
by
private owners over the years as well.  Another consideration is the
accessories, which tend to vary in terms of completeness.

I also recall that the D's were favored, however several years ago, I
bought
a C from Fair Radio as the few D's on hand were rough.

So, the definitive answer, as it is with most things ... it depends. ;-)

Barry


----- Original Message ----- 
From: "David Edsall" <dedsall at crocker.com>
To: <milsurplus at mailman.qth.net>
Sent: Thursday, June 10, 2004 9:34 PM
Subject: Re: [Milsurplus] URM-25D vs. URM-25F


> Mahlon and the group,
>
> Some years ago, as I recall, the received wisdom was that the URM-25D
was
> the standard by which they were measured, and the F-model was inferior
-
the
> D's were snapped up, while F's sold for less and were the last to go.
There
> were some exterior differences, but I don't know if they mirrored any
> interior mods.  BTW, mine is the URM-25D.
> Is that how others remember it?
> David, W1TDD
>
> ----- Original Message -----
> From: "Mahlon Haunschild" <mahlonhaunschild at cox.net>
> To: <milsurplus at mailman.qth.net>
> Sent: Thursday, June 10, 2004 8:37 PM
> Subject: [Milsurplus] URM-25D vs. URM-25F
>
>
> > Hello, list.
> >
> > The other day on this list (I think it was on this list) someone
allowed
> > as how he thought the URM-25F was better than its older URM-25D
sibling.
> >   Could you please summarize your thoughts on this for us?  I own a
> > URM-25F, but I was unaware that there were any significant functional
or
> > performance differences between the two.
> >
> > Any "gotchas" or things to look our for in a URM-25F?  Like replace
all
> > paper capacitors (I don't think it has any, actually...)?
> >
> > regards,
> >
> > Mahlon - K4OQ
> >
> > _______________________________________________
> > Milsurplus mailing list
> > Milsurplus at mailman.qth.net
> > http://mailman.qth.net/mailman/listinfo/milsurplus
> >
>
> _______________________________________________
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> Milsurplus at mailman.qth.net
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>


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