1000+ Members - Group for Radio Shack DX-394 Users

1000+ Members - Group for Radio Shack DX-394 Users

Post by Tom Holde » Tue, 28 Mar 2006 13:07:17

This group has the most complete collection of modifications, usage tips,
links to related websites, documentation, and photos along with a user
survey and a message forum (4000+ messages archived) to help you get the
most
fun and DX out of your Realistic / Radio Shack DX-394, DX394, DX 394.

Over 90 mods and tips now listed plus a dozen on the To Do or Wish List.
More mods than for any other general coverage receiver! Thoroughly
documented with a Master Index. If you like to tinker with radios, I know of
no other recent model that lends itself to as much fun in this arena as the
DX-394. Great platform for learning radio-electronics. Always 1 or more FA
on eBay.

Active & friendly user community now with over 1000 members. Some members
are
keen short wave listeners; others are into AM DXing and a few enjoy long
wave. Many experiment with antennas and some are ardent modifiers -
customising and souping up the rig as hot rodders would do with cars. You'll
find lots to interest you and help get the most out of your radio.

All here at:
 http://groups.yahoo.com/group/-RADIOSHACKDX394/

Subscribe on line (for full access privileges to the extensive collection of
Files, Photos and Links) or by email:

only).

73, Tom

 
 
 

1000+ Members - Group for Radio Shack DX-394 Users

Post by RHF » Tue, 28 Mar 2006 14:00:10


TH - The Group's Link/URL got truncated/cut.

Radio Shack DX-394 User's Group
RadioShack DX394 {DX 394}
DX-394 => http://tinyurl.com/o6rgr

Radio Shack DX-394 User's Group
RadioShack DX394 {DX 394}
http://groups.yahoo.com/group/RADIOSHACKDX394/

Radio Shack DX-394 User's Group
RadioShack DX394 {DX 394}
<http://groups.yahoo.com/group/RADIOSHACKDX394/>

RigPix DataBase listing for the
Radio Shack DX-394 [DX394 DX 394]
http://www.rigpix.com/rs-realistic/realistic_dx394.htm

ABOUT - Radio Shack DX-394 Shortwave Radio
http://groups.google.com/group/rec.radio.shortwave/msg/73a2da4123a74125

just my two cents worth - jm2cw ~ RHF
 .
 .
. .
       .

 
 
 

1000+ Members - Group for Radio Shack DX-394 Users

Post by Han » Tue, 28 Mar 2006 17:13:11

Congratulations Tom

that is an impressibe amount of subscribers. i think mostly US in
europe this is not the most poppular receiver.

With kind regards

Han The Netherlands.

You can also visit my website with a lot of recordings of rediostations
under 30 MHz.

http://home.wanadoo.nl/hanhardonk/indexengels.html

 
 
 

1000+ Members - Group for Radio Shack DX-394 Users

Post by Jack Ricc » Tue, 28 Mar 2006 21:52:00

   The addresses to subscribe to this group do not work from Canada. Any
mistakes? I get the message that this group does not exist...

Jack


> This group has the most complete collection of modifications, usage tips,
> links to related websites, documentation, and photos along with a user
> survey and a message forum (4000+ messages archived) to help you get the
> most
> fun and DX out of your Realistic / Radio Shack DX-394, DX394, DX 394.

> Over 90 mods and tips now listed plus a dozen on the To Do or Wish List.
> More mods than for any other general coverage receiver! Thoroughly
> documented with a Master Index. If you like to tinker with radios, I know
> of
> no other recent model that lends itself to as much fun in this arena as
> the
> DX-394. Great platform for learning radio-electronics. Always 1 or more FA
> on eBay.

> Active & friendly user community now with over 1000 members. Some members
> are
> keen short wave listeners; others are into AM DXing and a few enjoy long
> wave. Many experiment with antennas and some are ardent modifiers -
> customising and souping up the rig as hot rodders would do with cars.
> You'll
> find lots to interest you and help get the most out of your radio.

> All here at:
> http://groups.yahoo.com/group/-RADIOSHACKDX394/

> Subscribe on line (for full access privileges to the extensive collection
> of Files, Photos and Links) or by email:

> only).

> 73, Tom

 
 
 

1000+ Members - Group for Radio Shack DX-394 Users

Post by Caveat Lecto » Tue, 28 Mar 2006 23:05:07

Just FYI: I see a lot of these mods to increase sensitivity -- resulting in
trashing the dynamic range

Remember some of these mods are made by amateurs

The factory engineers designed the sensitivity for very good reasons
--
CL -- I doubt, therefore I might be !


> This group has the most complete collection of modifications, usage tips,
> links to related websites, documentation, and photos along with a user
> survey and a message forum (4000+ messages archived) to help you get the
> most
> fun and DX out of your Realistic / Radio Shack DX-394, DX394, DX 394.

> Over 90 mods and tips now listed plus a dozen on the To Do or Wish List.
> More mods than for any other general coverage receiver! Thoroughly
> documented with a Master Index. If you like to tinker with radios, I know
> of
> no other recent model that lends itself to as much fun in this arena as
> the
> DX-394. Great platform for learning radio-electronics. Always 1 or more FA
> on eBay.

> Active & friendly user community now with over 1000 members. Some members
> are
> keen short wave listeners; others are into AM DXing and a few enjoy long
> wave. Many experiment with antennas and some are ardent modifiers -
> customising and souping up the rig as hot rodders would do with cars.
> You'll
> find lots to interest you and help get the most out of your radio.

> All here at:
> http://groups.yahoo.com/group/-RADIOSHACKDX394/

> Subscribe on line (for full access privileges to the extensive collection
> of Files, Photos and Links) or by email:

> only).

> 73, Tom

 
 
 

1000+ Members - Group for Radio Shack DX-394 Users

Post by Jack Ricc » Tue, 28 Mar 2006 22:52:27

TH - The Group's Link/URL got truncated/cut.

Radio Shack DX-394 User's Group
RadioShack DX394 {DX 394}
DX-394 => http://tinyurl.com/o6rgr

Radio Shack DX-394 User's Group
RadioShack DX394 {DX 394}
http://groups.yahoo.com/group/RADIOSHACKDX394/

OOOoooopps!   Correction noted. Thanks.

Jack


>   The addresses to subscribe to this group do not work from Canada. Any
> mistakes? I get the message that this group does not exist...

> Jack



>> This group has the most complete collection of modifications, usage tips,
>> links to related websites, documentation, and photos along with a user
>> survey and a message forum (4000+ messages archived) to help you get the
>> most
>> fun and DX out of your Realistic / Radio Shack DX-394, DX394, DX 394.

>> Over 90 mods and tips now listed plus a dozen on the To Do or Wish List.
>> More mods than for any other general coverage receiver! Thoroughly
>> documented with a Master Index. If you like to tinker with radios, I know
>> of
>> no other recent model that lends itself to as much fun in this arena as
>> the
>> DX-394. Great platform for learning radio-electronics. Always 1 or more
>> FA
>> on eBay.

>> Active & friendly user community now with over 1000 members. Some members
>> are
>> keen short wave listeners; others are into AM DXing and a few enjoy long
>> wave. Many experiment with antennas and some are ardent modifiers -
>> customising and souping up the rig as hot rodders would do with cars.
>> You'll
>> find lots to interest you and help get the most out of your radio.

>> All here at:
>> http://groups.yahoo.com/group/-RADIOSHACKDX394/

>> Subscribe on line (for full access privileges to the extensive collection
>> of Files, Photos and Links) or by email:

>> only).

>> 73, Tom

 
 
 

1000+ Members - Group for Radio Shack DX-394 Users

Post by Tom Holde » Wed, 29 Mar 2006 02:19:55


Quote:

> Just FYI: I see a lot of these mods to increase sensitivity -- resulting
> in trashing the dynamic range

Which of these mods do you think increase sensitivity at the expense of
dynamic range?

Quote:> Remember some of these mods are made by amateurs

Many of whom are electronics professionals. That's not to say that novices
at electronics do not carry out some mods. One of the virtues of the DX-394
is that it can be readily modified and doing so is a great educational
activity for someone getting into radio and electronics.

Quote:> The factory engineers designed the sensitivity for very good reasons

And made some mistakes in other areas, e.g., decoupling around the IF
filters, AGC time constant for SSB (factory corrected in the revised
versions), and some design trade-offs or decisions that owners want to
correct. That is true of every product.

Quote:> --
> CL -- I doubt, therefore I might be !

And I was named after the biblical doubter.

Tom

 
 
 

1000+ Members - Group for Radio Shack DX-394 Users

Post by Caveat Lecto » Wed, 29 Mar 2006 03:25:03

I refer you to the Elecraft page
http://www.elecraft.com/K2_perf.htm

Sez
MDS = Minimum Discernible Signal (3db increase above noise floor). Larger
negative numbers are generally better, but too much sensitivity can reduce
strong signal dynamic range and Ip3. Pre-Amp On MDS numbers of -130 dBm or
more are more than adequate for most HF band operating, since band noise is
typically above this number. (Lower frequencies need less MDS (more +number)
due to an increase in atmospheric noise.)

--
CL -- I doubt, therefore I might be !




>> Just FYI: I see a lot of these mods to increase sensitivity -- resulting
>> in trashing the dynamic range

> Which of these mods do you think increase sensitivity at the expense of
> dynamic range?

>> Remember some of these mods are made by amateurs

> Many of whom are electronics professionals. That's not to say that novices
> at electronics do not carry out some mods. One of the virtues of the
> DX-394 is that it can be readily modified and doing so is a great
> educational activity for someone getting into radio and electronics.

>> The factory engineers designed the sensitivity for very good reasons

> And made some mistakes in other areas, e.g., decoupling around the IF
> filters, AGC time constant for SSB (factory corrected in the revised
> versions), and some design trade-offs or decisions that owners want to
> correct. That is true of every product.

>> --
>> CL -- I doubt, therefore I might be !

> And I was named after the biblical doubter.

> Tom

 
 
 

1000+ Members - Group for Radio Shack DX-394 Users

Post by clift » Wed, 29 Mar 2006 04:29:12


> Just FYI: I see a lot of these mods to increase sensitivity -- resulting in
> trashing the dynamic range

> Remember some of these mods are made by amateurs

> The factory engineers designed the sensitivity for very good reasons

Problem is, many times those reasons have more to do with cost than
with performance.

--
All relevant people are pertinent.
All rude people are impertinent.
Therefore, no rude people are relevant.
 -- Solomon W. Golomb

 
 
 

1000+ Members - Group for Radio Shack DX-394 Users

Post by Tom Holde » Wed, 29 Mar 2006 05:25:52


Quote:>I refer you to the Elecraft page
> http://www.elecraft.com/K2_perf.htm

> Sez
> MDS = Minimum Discernible Signal (3db increase above noise floor). Larger
> negative numbers are generally better, but too much sensitivity can reduce
> strong signal dynamic range and Ip3. Pre-Amp On MDS numbers of -130 dBm or
> more are more than adequate for most HF band operating, since band noise
> is typically above this number. (Lower frequencies need less MDS (more
> +number) due to an increase in atmospheric noise.)

> --
> CL -- I doubt, therefore I might be !

I have no dispute with that. Rather with your first comment:

Quote:>>> Just FYI: I see a lot of these mods to increase sensitivity -- resulting
>>> in trashing the dynamic range

>> Which of these mods do you think increase sensitivity at the expense of
>> dynamic range?

You did not answer the question. The answer may well be 'none'. I'm not
aware of any aimed at increased sensitivity, unless adding an amplified
preselector counts as a mod. And that could arguably be for improved dynamic
range and sensitivity by improving front-end selectivity and noise figure.
Most regard the DX-394 as a very sensitive receiver that is outperformed in
that spec by few others. But itcould do with improved overload threshold and
IP3.

Methinks you might be trashing imagined mods rather than the ones
well-documented in the user group.

Tom

 
 
 

1000+ Members - Group for Radio Shack DX-394 Users

Post by dxAc » Wed, 29 Mar 2006 05:57:54




> >> Just FYI: I see a lot of these mods to increase sensitivity -- resulting in
> >> trashing the dynamic range

> >> Remember some of these mods are made by amateurs

> >> The factory engineers designed the sensitivity for very good reasons

> >Problem is, many times those reasons have more to do with cost than
> >with performance.

> My question would be...

> WHAT does this have to do with scanning,
> and WHY was it cross-posted to 6 newsgroups??

Because the original poster is a Canuck, and doesn't know any better?

- Show quoted text -

Quote:

> Lumber Cartel (tinlc) #2063. Spam this account at your own risk.

> This sig censored by the Office of Home and Land Insecurity...

>               Remove XYZ to email me

 
 
 

1000+ Members - Group for Radio Shack DX-394 Users

Post by Caveat Lecto » Wed, 29 Mar 2006 06:11:33

Aplogies for the cross posting - I was just responding to the original
post'Gotta be more careful

--
CL -- I doubt, therefore I might be !





>>> Just FYI: I see a lot of these mods to increase sensitivity -- resulting
>>> in
>>> trashing the dynamic range

>>> Remember some of these mods are made by amateurs

>>> The factory engineers designed the sensitivity for very good reasons

>>Problem is, many times those reasons have more to do with cost than
>>with performance.

> My question would be...

> WHAT does this have to do with scanning,
> and WHY was it cross-posted to 6 newsgroups??

> Lumber Cartel (tinlc) #2063. Spam this account at your own risk.

> This sig censored by the Office of Home and Land Insecurity...

>              Remove XYZ to email me

 
 
 

1000+ Members - Group for Radio Shack DX-394 Users

Post by Tom Holde » Wed, 29 Mar 2006 06:30:01



Quote:

> My question would be...

> WHAT does this have to do with scanning,
> and WHY was it cross-posted to 6 newsgroups??

The DX-394 is a scanning receiver, reviews have described its user interface
as reflecting a scanner heritage, it has been a topic in all the newsgroups
to which I posted the notice, and similar notices have been crossposted a
few times in all these newsgroups informing potentially interested parties
about http://groups.yahoo.com/group/RADIOSHACKDX394/, without objection.

Are there any other newsgroups for which it would be relevant? The ones I
posted to are:
rec.radio.shortwave, alt.radio.scanner, alt.radio.scanner.uk,
rec.radio.amateur.equipment, rec.radio.amateur.homebrew

73, Tom

 
 
 

1000+ Members - Group for Radio Shack DX-394 Users

Post by Butch Mage » Wed, 29 Mar 2006 08:42:58


> Just FYI: I see a lot of these mods to increase sensitivity -- resulting in
> trashing the dynamic range

> Remember some of these mods are made by amateurs

> The factory engineers designed the sensitivity for very good reasons

Thank you Mr. Lector for reminding the wannabe multi-year experienced
EEs that it is best to leave well enough alone.

Butch KF5DE

 
 
 

1000+ Members - Group for Radio Shack DX-394 Users

Post by Jack Ricc » Wed, 29 Mar 2006 10:29:17

The DX-394 is a scanning receiver, reviews have described its user interface
as reflecting a scanner heritage...

I agree...and I'm a Canuck...




>> My question would be...

>> WHAT does this have to do with scanning,
>> and WHY was it cross-posted to 6 newsgroups??

> The DX-394 is a scanning receiver, reviews have described its user
> interface as reflecting a scanner heritage, it has been a topic in all the
> newsgroups to which I posted the notice, and similar notices have been
> crossposted a few times in all these newsgroups informing potentially
> interested parties about http://groups.yahoo.com/group/RADIOSHACKDX394/,
> without objection.

> Are there any other newsgroups for which it would be relevant? The ones I
> posted to are:
> rec.radio.shortwave, alt.radio.scanner, alt.radio.scanner.uk,
> rec.radio.amateur.equipment, rec.radio.amateur.homebrew

> 73, Tom