Realistic DX-302 info
Don
I have a Realistic DX-302 I purchased in the early 80's. Can anyone tell
me who made this radio for Rshack? Also, are there any mods for this
receiver? Thanks, Don
Christopher A. King
Don wrote:
Believe that it was built by GRE... not aware of any mods for it,
though. Doesn't look like there's inherently anything much you
_could_ do with it -- though I've thought about improving the
audio quality on it a bit, as a "rainy-day" project... it's a bit
on the muddy side for me.
C.K.
Jim Mulligan
Christopher A. King
I am having a VERY difficult time believing this... :^)
C.K.
Jim Mulligan
Wow, I don't doubt that at it. The very idea kinda knocks one back
now.
Yet, almost a generation ago now --- 1980 --- Yaesu was just entering
the US market and supplied RS with the DX 300/302 receivers.
I've always wondered what the Japanese must have thought of some RS
features --- like the Morse code practice facility.
Then again, I rember when Tandy didn't own RS, it had 7 stores, most
in Boston, ans sold tires through the mail.
J.M.
David Moisan
>> "Christopher A. King" <cki...@ford.com> wrotD:
>>
>> >
>> >Don wrote:
>> >
>> >> I have a Realistic DX-302 I purchased in the early 80's. Can anyone tell
>> >> me who made this radio for Rshack? Also, are there any mods for this
>> >> receiver? Thanks, Don
>> >
>> >Believe that it was built by GRE... not aware of any mods for it,
>> >though. Doesn't look like there's inherently anything much you
>> >_could_ do with it -- though I've thought about improving the
>> >audio quality on it a bit, as a "rainy-day" project... it's a bit
>> >on the muddy side for me.
I'd be happy if there were a mod to improve its stability. I have
one, and it drifts almost as badly as my old DX160 used to do!
Dave
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Carl Hodder
Jim Mulligan (jim.mu...@ibm.net) wrote:
: "Christopher A. King" <cki...@ford.com> wrotD:
: >> >Believe that it was built by GRE... not aware of any mods for it,
I don't think GRE made it and I'm not even sure that GRE was around
then.
: Yet, almost a generation ago now --- 1980 --- Yaesu was just entering
: the US market and supplied RS with the DX 300/302 receivers.
I also don't think Yaesu built it even though it looks about the
same size as a FRG-7 with similar features and spec's. and has a
preselector.
I would like to know who built it but believe it was made in either
Korea or Mexico. I remember reading about quality control problems
with the DX-300 and DX-301. Not sure if it was all corrected in the
DX-302.
: Then again, I rember when Tandy didn't own RS, it had 7 stores, most
Christopher A. King
David Moisan wrote:
> I'd be happy if there were a mod to improve its stability. I have
> one, and it drifts almost as badly as my old DX160 used to do!
That's strange -- I own both, and neither really has that much of a
drifting problem. The '302 does on the 7MHz setting, about 6KHz
lower from cold to warm. But none of the other MHz bands that I
normally use have the same problem; they're pretty much stable give
or take 1KHz. The DX-160, mine anyway, does not drift any more than
my HQ-180 does in the process of warming up. Mabye I just got "good"
ones...
C.K.
Jarad Kardkoff
In article <335F69...@ford.com> "Christopher A. King" <cki...@ford.com> writes:
>From: "Christopher A. King" <cki...@ford.com>
>Subject: Re: Realistic DX-302 info
>Date: Thu, 24 Apr 1997 10:08:33 -0400
>David Moisan wrote:
>C.K.
yeah, maybe you did.
jarad
Christopher A. King
Carl Hodder wrote:
> I would like to know who built it but believe it was made in either
> Korea or Mexico. I remember reading about quality control problems
> with the DX-300 and DX-301. Not sure if it was all corrected in the
> DX-302.
Made in Japan -- not a whole lot of consumer electronics goods
were being produced in Korea or Mexico that far back (ca. 1979).
Radically different global economy back then, compared to what
we have today.
I thought that I read somewhere in my travels that they were
designed and built for RS by GRE, but not absolutely sure of
that. The do bear a striking resemblence to General Electric
multiband radios from the same time period, but that could
probably be true for all radios of the time (Panasonic et al).
Having owned both the '300 and the '302, I can see what was im-
proved with the later model; probably the most significant of the
changes was the incorporation of a true 2-position IF bandwidth
user adjustment, as opposed to an 3-position audio filter on the
'300. The '302 is also much less prone to internal heterodynes,
not _totally_ free from them, but it's a lot less of a problem.
The '300 had birdies on all even MHz settings (i.e. 5.000, 6.000,
etc.) and these would beat against WWV. There was also an ex-
tremely strong one at 1.000MHz that would totally obstruct re-
ception in that area of the MW band. This '302 has a weak
birdie at 910KHz, but that's about the only one I've noticed so
far. RS issued service bulletins for the '300 that described
modifications to improve stability and reduce image/intermod
problems, but these were incorporated into the manufacture of
them after a certain date code (they were added to mine). I
think that if you contact the RS Technical Library you can
get copies of that information.
(While we're on that subject, they just sent me a copy of the
service manual for the DX-200 this week; only set me back
$5.00...)
They're okay radios for what they sell for used today, if and
when you can find one, as long as you are aware of their in-
herent limitations. Definitely _not_ the receiver of choice
for anyone who changes SW bands often... :^)
C.K.
Kenneth Klimasewski
sounds like the BFO injection is off freq. There is a coil I adjusted to
a zero beat with WWV while on lower SSB which corrects the problem
except
now the Upper SSB has the same problem the lower SSB did.
Does anyone have a schematic of this or would be willing to make a copy
of the service manual for me. I will gladly pay for any postage
involved.
thanks,
Ken, N1KK
please email to: klima...@fccvde.enet.dec.com
Christopher A. King
Kenneth Klimasewski wrote:
> I just picked up a DX-300 that needs some minor work. The lower SSB
> sounds like the BFO injection is off freq. There is a coil I adjusted to
> a zero beat with WWV while on lower SSB which corrects the problem
> except
> now the Upper SSB has the same problem the lower SSB did.
> Does anyone have a schematic of this or would be willing to make a copy
> of the service manual for me. I will gladly pay for any postage
> involved.
Contact the Tandy Technical Library on Fort Worth. You can get the
phone number from their home page. I just got a copy of the DX-200
service manual from them this way...
C.K.
Katkey007
Hi Dave
Here I am again - ran into you twice in one day!!!
I am somewhat of a expert on DX300/302's. The bedst thing to do with them
is give 'em a super alignment and tweeking, peaking session. I am
currently using two 302's and a 300. No complaints. Drift is not bad if
warmed up for 30 mins. By the way; 300 (despite shortcommings with audio
filters and no IF filters) can be aligned and calibrated to be great AM
B'cast receiver.
Se U again,
Bob, N1KPR email: bobn...@aol.com
BOBN1KPR
RE: BFO - L312 is on the front/right with rig facing you.
Set BFO to center and tune to ZERO BEAT a local AM station.
Tweek L312 for the same audio pitch in both LSB and USB.
That is the short-cut method.
The other way is by-the-book with a sig gen, but gives the same results.
Happy listening,
Bob
bobn...@aol.com
good idea to c/c me also at email: kat...@aol.com
Suzanne & Larry McHenry
BOBN1KPR wrote:
>
> RE: BFO - L312 is on the front/right with rig facing you.
> Happy listening,
> Bob
Hi Bob, Thanks for the BFO tip. I also have a DX-302 radio and rather
enjoy it's "Buck Rogers" look.(as some people refer).
Anyways, mine seems to be a little on the insensitive side. I was wondering
if you knew of a quick fix/tweek that might inprove it. Bear in mind that
I'm not very electroniclly talented. I know enough to get myself into
trouble. (real quick!). Just a typical user. (show me the gas & brakes).
I'm willing to take a stab at it if it's not too complicated.
Larry McHenry LS...@city-net.com