[R-390] WTB: R-388/URR or R-390A

Wed Apr 30 12:57:58 EDT 2008

I am curious as to why you think the r-388 is 10 dB deafer on BCB?
I am a ham bander but I take it BCB is the AM broadcast band ?
I've worked on several r-388's,51j-3/j-4 and fine them quite sensitive on
my test bed.  If memory serves me correctly, the main complaint is that the 
51J's have
perhaps TOO much gain on the BCB band and hence may suffer accordingly.
(e.g. front end over load, intermod  due to the strong local stations).
The 0.5 to 1.5 MHz band goes through 3 mixing stages whereas the other bands
go through 1 or two mixing stages.  The final IF on the 51J's is 500KHz.

The sp-600 uses 1 mixing stage for the lower bands with a 455 Khz IF. On the
higher bands they use a 1st IF in the 3 MHz area and then down convert to 
455KHz.

I haven't dug into my r-390's/r-390A yet, but since it is built like a brick 
sh*t house,
I would suspect that they have done a better job of optimizing gain 
distribution within
the Rx or have better RF front end filtering on the BCB band than the 51J's 
do.

>From: Bob Young <youngbob53 at msn.com>
>To: <r-390 at mailman.qth.net>
>Subject: Re: [R-390] WTB: R-388/URR or R-390A
>Date: Wed, 30 Apr 2008 11:51:28 -0400
>
>
>-
>I have also used all 4 for BCB DXing and agree that the R390/URR is 
>probably the best out of the bunch for BCB DXing although mine is not 
>finished. I have had very good luck with both 390A/URR's and SP-600's also. 
>A 388/URR is also a good BCB receiver but does not seem to be quite as 
>sensitive as the rest of them but I wouldn't count it out either. My 390A 
>was rebuilt by Chuck Ripple a few years ago so is in top notch condition 
>and is also an excellent BCB DX radio. My SP-600 has analog  readout good 
>enough to pretty much know where you are give or take a kilocycle.
>
>Bob Young
>KB1OKL
> >
> > Message: 6
> > Date: Tue, 29 Apr 2008 19:02:57 -0500
> > From: "Les Locklear" <leslocklear at cableone.net>
> > Subject: Re: [R-390] WTB: R-388/URR or R-390A
> > To: "Gary Smith" <wa1tjb at yahoo.com>, <r-390 at mailman.qth.net>
> > Message-ID: <000b01c8aa55$8c5a9d70$cea53d43 at zion>
> > Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> > 	reply-type=original
> >
> > If, you are truly "into" BCB DX'ing, you will want a R-390/URR or as the 
>"X
> > Generation Crowd" says, a "non A."
> >
> > The R-388/URR or any of its variations are 10db "deafer." I know that 
>isn't
> > "correct English," but the "non A," isn't correct terminology no matter 
>how
> > you cut it.
> >
> > There were Two (2) different receivers built, the R-390/URR and the
> > R-390A/URR, the differences are well known but, some people seem to 
>think
> > that saying "non A" is the correct terminology......'nuff said.
> >
> > Errrrr, not quite, I have a SP-600 coupled with a digital fraequency 
>display
> > that is the equal of "any" of the R-388 or R-390 series.
> >
> > Time for summer and to get off my once yearly soap box about the "Non 
>A."
> > (which doesn't exist).
> >
> > Thank you very much!
> >
> > Les Locklear
> > Gulfport, Ms.
> > DX'ing Since '57
> > http://www.hammarlund.info/
> >
> >
> > ----- Original Message -----
> > From: "Gary Smith" <wa1tjb at yahoo.com>
> > To: <r-390 at mailman.qth.net>
> > Sent: Tuesday, April 29, 2008 12:01 PM
> > Subject: [R-390] WTB: R-388/URR or R-390A
> >
> >
> > > Greetings!
> > >
> > > I am getting more involved in BCB DX'ing and am interested in 
>purchasing
> > > one of these fine receivers.  If anyone has an R-388/URR or R-390A 
>that is
> > > in good cosmetic and working condition, and they are willing to part 
>with
> > > it, please contact me directly.
> > >
> > > Thanks!
> > >
> > > Gary Smith
> > > WA1TJB
> > >
> > >
> > >
> > >
> > >
> > > 
>____________________________________________________________________________________
> > > Be a better friend, newshound, and
> > > know-it-all with Yahoo! Mobile.  Try it now.
> > > http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ
> > > _____________________________________________________________
> > > R-390 mailing list
> > > Home: http://mailman.qth.net/mailman/listinfo/r-390
> > > Help: http://mailman.qth.net/faq.htm
> > > Post: mailto:R-390 at mailman.qth.net
> > > Unsubscribe: http://mailman.qth.net/mailman/options/r-390
> > >
> > >
> > > --
> > > No virus found in this incoming message.
> > > Checked by AVG.
> > > Version: 7.5.524 / Virus Database: 269.23.6/1403 - Release Date: 
>4/29/2008
> > > 7:26 AM
> > >
> > >
> >
> >
> >
> > ------------------------------
> >
> > _______________________________________________
> > R-390 mailing list
> > R-390 at mailman.qth.net
> > http://mailman.qth.net/mailman/listinfo/r-390
> >
> >
> > End of R-390 Digest, Vol 48, Issue 27
> > *************************************
>
>_________________________________________________________________
>Express yourself wherever you are. Mobilize!
>http://www.gowindowslive.com/Mobile/Landing/Messenger/Default.aspx?Locale=en-US?ocid=TAG_APRIL_____________________________________________________________
>R-390 mailing list
>Home: http://mailman.qth.net/mailman/listinfo/r-390
>Help: http://mailman.qth.net/faq.htm
>Post: mailto:R-390 at mailman.qth.net
>Unsubscribe: http://mailman.qth.net/mailman/options/r-390