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

[ROBERT YOUNG]

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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