[R-390] UR 390

[Transmaster]

Here is the text of the caption from the Leger Laboratories ad' from the
March 1968 "73" magazine.:

"This is the primary frequency standard. It consists of a Collins
UR-390 receiver, a Hewlett=Packard counter and an SR-60 VLF phase
comparators.  this setup is used to monitor WWVB on 60 kHz and gives
us a frequency standard traceable to NBS for
frequency measurement."

If this receiver is working at 60 kHz could this be a VLF version of
the R390/URR or is it a miss identified R-289/URR


Ken

On 1/31/07, Joe Foley <redmenaced at yahoo.com> wrote:
> The official designation of that radio is the
> R-390/URR.  Maybe someone who made the ad didn't quite
> understand the nomenclature.
>
> Joe
>
>
>
> --- Transmaster <22hornet at gmail.com> wrote:
>
> > Yes that is what it looked like. I am aware of the
> > R390 non A  but I
> > have never seen one called a UR-390 I was wondering
> > if this might be
> > yet another type of R390, non A.
> >
> >
> > Ken
> >
> > On 1/31/07, Bob Young <youngbob53 at msn.com> wrote:
> > > I am no expert, but if you're asking what is a
> > R-390, it was the predecessor
> > > to the A and had (I believe someone will correct
> > me and add additional info
> > > I'm sure) LC filters instead of mechanical
> > filters, also had more tubes and
> > > supposedly was more complex. I think they had 32
> > tubes, the A was supposed
> > > to be a cost reduced version, this topic can get a
> > little controversial
> > > around here, haha! You will see them on ebay
> > occasionally. I have a 388 on
> > > the way, my radio after that will be a 390. The
> > way you can tell at a glance
> > > is that the ant. trimmer is off on the right side
> > I believe and the plate is
> > > right where you desribed.
> > >
> > > Bob Young
> > > Millbury, Ma
> > > (no letters yet)
> > >
> > >
> > > >From: Transmaster <22hornet at gmail.com>
> > > >To: R-390 <R-390 at mailman.qth.net>
> > > >Subject: [R-390] UR 390
> > > >Date: Wed, 31 Jan 2007 07:53:20 -0700
> > > >
> > > >I was looking through a 1970 issue of '73
> > magazine. In a ad' for an
> > > >outfit which repaired and calibrated radios, and
> > test equipment. There
> > > >is a photo which shows a rack mount of gear used
> > to receive WWV as a
> > > >calibration standard.  In the rack is a radio the
> > caption identifies
> > > >as a UR-390,  the front panel on the radio is the
> > same as my R-390A
> > > >except there is no antenna trimmer and the
> > nomenclature plate is
> > > >installed where the trimmer would have been.  I
> > tried to scan the
> > > >photo in but it is to blurred to make it worth
> > sending. I have never
> > > >read of a UR-390 mentioned on this forum. What
> > flavor of 390 is this
> > > >receiver?
> > > >
> > > >                                    Ken de W7ITC
> > > >
> > > >--
> > > >Kenneth A. Crips, W7ITC Home of the Chew Crew,
> > Red Headed
> > > >Irish Terrier House Ninjas, Chic', and Cowboy
> > > >10th degree black belts in Mouch Fue, Bed Fue,
> > and
> > > >Con Artist Fue.
> > >
> >
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> > >
> > >
> >
> >
> > --
> > Kenneth A. Crips, W7ITC Home of the Chew Crew,  Red
> > Headed
> > Irish Terrier House Ninjas, Chic', and Cowboy
> > 10th degree black belts in Mouch Fue, Bed Fue, and
> > Con Artist Fue.
> >
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-- 
Kenneth A. Crips, W7ITC Home of the Chew Crew,  Red Headed
Irish Terrier House Ninjas, Chic', and Cowboy
10th degree black belts in Mouch Fue, Bed Fue, and
Con Artist Fue.