[R-390] What is the difference between 390 and 390A

[Michael Murphy]

That's right Bob.  We like all of them. What we need is a radio performance
scale. Let's call a command set receiver a 2 and an R-390 a 9.  This ought
to bring out the natives..
Here is the scale:

1. Knight Space Spanner
2. ARC-5 Command Set
3. Heath HR-10
4. BC-348
5. Hallicrafters SX-28
6. National HRO
7. Hammarlund HQ-180
8. Drake R4B
9. R390A
10. Murphy MB-40

Mike Murphy   WB2UID

----- Original Message ----- 
From: "Bob Camp" <ham at cq.nu>
To: "ROBERT YOUNG" <youngbob53 at msn.com>
Cc: <r-390 at mailman.qth.net>
Sent: Monday, April 11, 2005 5:12 PM
Subject: Re: [R-390] What is the difference between 390 and 390A


> Hi
>
> Obviously item number 4 is a prerequisite. We *never* get rid of
> radios, we just keep adding to the pile.
>
> Enjoy!
>
> Bob Camp
> KB8TQ
>
>
> On Apr 11, 2005, at 4:34 PM, ROBERT YOUNG wrote:
>
> > I'd like to thank all of you for taking the time to answer my
> > questions of
> > which I'm sure I'll have plenty more in the next months. You've helped
> > me to
> > decide which one to buy:
> >
> > 1. 390
> > 2. 390A
> > 3. SP-600
> > 4. keep my HQ-180
> > 5. many others.
> > haha!
> >
> > Bob Young
> >
> >
> >
> > ----- Original Message -----
> > From: "Damon Raphael" <w7md at comcast.net>
> > To: "ROBERT YOUNG" <youngbob53 at msn.com>
> > Cc: <r-390 at mailman.qth.net>
> > Sent: Monday, April 11, 2005 3:08 PM
> > Subject: Re: [R-390] What is the difference between 390 and 390A
> >
> >
> >> Hello Bob,
> >> I use a HQ-180, R390 and R390a.
> >> The 390 radios have more accurate frequency readout, to start. This is
> >> not surprising since they cost a fortune in 1950s and 1960s dollars
> >> when
> >> they were manufactured. They have the best freq readout of probably
> >> any
> >> non digital radio ever made.
> >> The 390 and 390a have the ability to listen to "wider" signals which
> >> means better audio fidelity when you want to listen to broadcast
> >> music.
> >> What the HQ-180 has, that the 390s don't, is a tunable notch filter.
> >> I use the Hammarlund mainly for SWL and the 390s for ham radio. The
> >> mechanical filters in the 390a are more effective for rejecting
> >> interference than the LC filters in the 390, but may give somewhat
> >> poorer quality audio fidelity at the same bandpass width.
> >> The R390 may be a little more sensitive than the 390a. It has an extra
> >> stage of RF amplification but this probably doen't really make much
> >> difference as both radio are very sensitive; otherwise, the Collins
> >> engineers wouldn't have removed the extra stage in the redesign to
> >> make
> >> the 390a.
> >> If you get a 390 or 390a, then you will have a considerable expense in
> >> getting it restored to its original operating specifications. There
> >> are
> >> only a few people who know enough about these radios to properly
> >> restore
> >> them.
> >> Hope thmis helps,
> >> Damon Raphael, W7MD
> >> Tucson, AZ
> >>
> >>
> >> ROBERT YOUNG wrote:
> >>> Hi,
> >>>
> >>> I'm new here, I'm a BCB dx'er and plan on buying a Collins within the
> >>> next
> >>> year and was recommended to come here for help by a fellow member of
> >>> the
> >>> NRC. I'll probably have a lot of questions and my first one is what
> >>> is
> >>> the
> >>> difference between the 390 and the 390A? Which would be better for
> >>> BCB
> >>> DXing? Also I use a nice HQ-180 right now, can anyone compare the two
> >>> for
> >>> me? thanks,
> >>>
> >>> Bob Young
> >>> _____________________________________________________________
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> >>
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