 |
|
| Science Forum Index » Electronics Forum » Radio Shack?... |
|
Page 1 of 2 Goto page 1, 2 Next |
|
| Author |
Message |
| Paul Bunion... |
 Posted: Tue Dec 19, 2006 7:48 pm |
|
|
|
Guest
|
I can't believe the looks I get lately when I want an electronic part
from Radio Shack. A few weeks ago I wanted a prox switch. The counter on
my tread mill failed. The spinning magnet on the pulley swithes the prox
switch to step the counter and timer. I think they thought I was
building a bomb. The store clerk didn't know what the hell I was talking
about. Just the other day I walked in and ask to see the muffin fans and
two clerks jaws dropped to the floor. The didn't have a clue what I was
talking about; never heard that name before? I can't believe how stupid
these people are getting. |
|
|
| Back to top |
|
|
|
| Nermal... |
| Posted: Tue Dec 19, 2006 8:24 pm |
|
|
|
Guest
|
That's nothing...in Orlando you should have seen the blank look on the
persons face when I told him that I was looking for some LEDs!
Paul Bunion wrote:
[quote:87a30f9fe1]I can't believe the looks I get lately when I want an electronic part
from Radio Shack. A few weeks ago I wanted a prox switch. The counter on
my tread mill failed. The spinning magnet on the pulley swithes the prox
switch to step the counter and timer. I think they thought I was
building a bomb. The store clerk didn't know what the hell I was talking
about. Just the other day I walked in and ask to see the muffin fans and
two clerks jaws dropped to the floor. The didn't have a clue what I was
talking about; never heard that name before? I can't believe how stupid
these people are getting.[/quote:87a30f9fe1] |
|
|
| Back to top |
|
|
|
| Karl Uppiano... |
| Posted: Tue Dec 19, 2006 11:04 pm |
|
|
|
Guest
|
Unfortunately, Radio Shack is scaling back their electronics components. The
hobby is going the way of ham radio and high-fidelity. Our mall outlet has
no components anymore. I get all of my stuff from Mouser Electronics now. |
|
|
| Back to top |
|
|
|
| Robert Baer... |
| Posted: Wed Dec 20, 2006 4:35 am |
|
|
|
Guest
|
Nermal wrote:
[quote:bc3018283f]That's nothing...in Orlando you should have seen the blank look on the
persons face when I told him that I was looking for some LEDs!
....And RS carries them![/quote:bc3018283f] |
|
|
| Back to top |
|
|
|
| Nermal... |
| Posted: Wed Dec 20, 2006 2:36 pm |
|
|
|
Guest
|
I found then in the store.
Robert Baer wrote:
[quote:a237818955]Nermal wrote:
That's nothing...in Orlando you should have seen the blank look on the
persons face when I told him that I was looking for some LEDs!
...And RS carries them![/quote:a237818955] |
|
|
| Back to top |
|
|
|
| default... |
| Posted: Wed Dec 20, 2006 6:20 pm |
|
|
|
Guest
|
On Wed, 20 Dec 2006 10:00:13 -0000, "Alison" <invalid at (no spam) NOSPAM.com>
wrote:
Yeah, Radio Shaft has been useless for parts for years - computer or
TV cable they might have. The last time I was in one the only two
transistors were a 2N3055 in metal and plastic cases
[quote:3c860612f3]Our local grocery
stores sells 40" LCD televisions and bicycles. And their fruit 'n veg is
awful.
[/quote:3c860612f3]
Sounds like Walmart. mealy texture fruits - or one half of a fruit is
ripe and the other half, hard. Don't buy anything already in plastic
since it will be spoiled. Meats are in plastic "jewel boxes"
hermetically sealed to keep the carbon monoxide in and keeping the
stuff red.
I can get eggs, frozen food, canned cat food, and canned milk
there,nothing else - then stand on line for 20 minutes after taking 5
minutes to pick the stuff out. grrr.
----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
----= East and West-Coast Server Farms - Total Privacy via Encryption =---- |
|
|
| Back to top |
|
|
|
| jasen... |
| Posted: Thu Dec 21, 2006 3:14 am |
|
|
|
Guest
|
On 2006-12-20, Michael A. Terrell <mike.terrell at (no spam) earthlink.net> wrote:
[quote:e237b2e9d8]Yes, there are idiots selling both of these under the wrong name, but
if you contact any manufacture or OEM distributor it will show that you
don't know what you're doing.
[/quote:e237b2e9d8]
Do you make the same fuss when someone calls an 8 conductor modular plug
"RJ45"
--
Bye.
Jasen |
|
|
| Back to top |
|
|
|
| Michael A. Terrell... |
| Posted: Thu Dec 21, 2006 6:45 am |
|
|
|
Guest
|
jasen wrote:
[quote:b58ed8e6bf]
On 2006-12-20, Michael A. Terrell <mike.terrell at (no spam) earthlink.net> wrote:
Yes, there are idiots selling both of these under the wrong name, but
if you contact any manufacture or OEM distributor it will show that you
don't know what you're doing.
Do you make the same fuss when someone calls an 8 conductor modular plug
"RJ45"
[/quote:b58ed8e6bf]
Do you even know what a REAL RJ45 is? The connectors are actually
8P8C modular plugs and jacks. RJ45 is only one application for that
configuration, and there are a number of modified 8P8C connectors with
different keys to prevent them from being used in other jacks. When you
work in manufacturing or design, you HAVE to make sure that you're
buying the right parts for the job.
Here is a hint: RJ means "Registered Jack", which is a telephone
industry standard for telephone wiring, not computer networking.
--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.
Michael A. Terrell
Central Florida |
|
|
| Back to top |
|
|
|
| Paul Bunion... |
| Posted: Thu Dec 21, 2006 10:50 am |
|
|
|
Guest
|
Michael A. Terrell wrote:
[quote:30eb751898]jasen wrote:
On 2006-12-20, Michael A. Terrell <mike.terrell at (no spam) earthlink.net> wrote:
Yes, there are idiots selling both of these under the wrong name, but
if you contact any manufacture or OEM distributor it will show that you
don't know what you're doing.
Do you make the same fuss when someone calls an 8 conductor modular plug
"RJ45"
Do you even know what a REAL RJ45 is? The connectors are actually
8P8C modular plugs and jacks. RJ45 is only one application for that
configuration, and there are a number of modified 8P8C connectors with
different keys to prevent them from being used in other jacks. When you
work in manufacturing or design, you HAVE to make sure that you're
buying the right parts for the job.
Here is a hint: RJ means "Registered Jack", which is a telephone
industry standard for telephone wiring, not computer networking.
Common types[/quote:30eb751898]
* RJ11C/RJ11W: 6P2C, for one telephone line (6P4C with power on
second pair)
* RJ14C/RJ14W: 6P4C, for two telephone lines
* RJ25C/RJ25W: 6P6C, for three telephone lines
Uncommon types
* RJ12C/RJ12W: 6P4C, for one telephone line ahead of the key system
* RJ13C/RJ13W: 6P4C, for one telephone line behind the key system
* RJ15C: 3-pin weatherproof, for one telephone line
* RJ18C/RJ18W : 6P6C, for one telephone line with make-busy arrangement
* RJ61X: 8P8C, for four telephone lines
* RJ21X: 50-pin miniature ribbon connector, for up to 25 lines
* RJ2MB: 50-pin miniature ribbon connector, 2-12 telephone lines
with make-busy
* RJ31X: 8P8C (although usually only 4C are used), allows an alarm
system to seize the telephone line to make an outgoing call during an
alarm. Jack is placed ahead of all other equipment.
* RJ38X: 8P8C, similar to RJ31X, with continuity circuit
* RJ41S: 8P8C keyed, for one data line, universal
* RJ26X: 50-pin miniature ribbon connector, for multiple data lines,
universal
* RJ27X: 50-pin miniature ribbon connector, for multiple data lines,
programmed
* RJ48S: 8P8C, for four-wire data line (DDS)
* RJ48C: 8P8C, for four-wire data line (DSX-1)
* RJ48X: 8P8C with shorting bar, for four-wire data line (DS1)
* RJ49C: 8P8C, for ISDN BRI via NT1
* RJ71C: 12 line series connection using 50 pin connector (with
bridging adapter) ahead of customer equipment. Mostly used for call
sequencer equipment.
* RJ45S: 8P2C + keyed, for one data line with programming resistor
"Unofficial" (incorrect) plug names
These "RJ" names do not really refer to truly existing FCC RJ types:
* "RJ9", "RJ10", "RJ22": 4P4C or 4P2C, for telephone handsets. Since
telephone handsets do not connect directly to the public network, they
have no Registered Jack code whatsoever.
* "RJ45": 8P8C, informal designation for T568A/T568B, including
Ethernet; not the same as the true RJ45/RJ45S
* "RJ50": 10P10C, for data
DB connector
A family of plugs and sockets widely used in communications and computer
devices. DB connectors come in 9, 15, 25, 37 and 50-pin sizes. The DB
connector defines the physical structure of the connector, not the
purpose of each line.
D-subminiature connectors were invented by ITT Cannon , part of ITT.
Cannon's part-numbering system uses a D as the prefix for the whole
series, followed by a letter denoting the shell size (A=15 pin, B=25
pin, C=37 pin, D=50 pin, E=9 pin), followed by the actual number of
pins, followed by the gender (M=male, F=female). For example, DB25M
denotes a D-sub with a 25-pin shell size and 25 male contacts. The pins
in these connectors are spaced approximately 0.108 inch (2.74 mm) apart
with the rows spaced 0.112 inch (2.84 mm) apart.
There are now D-sub connectors which have the original shell sizes, but
more pins, and the names follow the same pattern. For example, the DE15,
usually found in VGA cables, has 15 pins in a shell the same size as a
DE9. The full list of connectors with this pin spacing is: DE15, DA26,
DB44, DC62, and DD78. Alternatively, following the same confusion
mentioned above in which all D-sub connectors are called "DB", these
connectors are often called DB15HD, DB26HD, DB44HD, DC62HD, and DD78HD,
where the "HD" stands for "high density". They all have 3 rows of pins,
except the DD78, which has 4.
A series of D-sub connectors with even denser pins is called "double
density", and consists of DE19, DA31, DB52, DC79, and DD100. They have 4
rows of pins.
There is yet another similar family of connectors that is easy to
confuse with the D-sub family, but is not part of it. These connectors
are named like "HD50" and "HD68", and have a D-shaped shell but the
shell is about half the width of a DB25. They are common in SCSI
attachments. |
|
|
| Back to top |
|
|
|
| Michael A. Terrell... |
| Posted: Thu Dec 21, 2006 11:38 am |
|
|
|
Guest
|
Paul Bunion wrote:
[quote:49e8692f24]
Michael A. Terrell wrote:
jasen wrote:
On 2006-12-20, Michael A. Terrell <mike.terrell at (no spam) earthlink.net> wrote:
Yes, there are idiots selling both of these under the wrong name, but
if you contact any manufacture or OEM distributor it will show that you
don't know what you're doing.
Do you make the same fuss when someone calls an 8 conductor modular plug
"RJ45"
Do you even know what a REAL RJ45 is? The connectors are actually
8P8C modular plugs and jacks. RJ45 is only one application for that
configuration, and there are a number of modified 8P8C connectors with
different keys to prevent them from being used in other jacks. When you
work in manufacturing or design, you HAVE to make sure that you're
buying the right parts for the job.
Here is a hint: RJ means "Registered Jack", which is a telephone
industry standard for telephone wiring, not computer networking.
Common types
* RJ11C/RJ11W: 6P2C, for one telephone line (6P4C with power on
second pair)
* RJ14C/RJ14W: 6P4C, for two telephone lines
* RJ25C/RJ25W: 6P6C, for three telephone lines
Uncommon types
* RJ12C/RJ12W: 6P4C, for one telephone line ahead of the key system
* RJ13C/RJ13W: 6P4C, for one telephone line behind the key system
* RJ15C: 3-pin weatherproof, for one telephone line
* RJ18C/RJ18W : 6P6C, for one telephone line with make-busy arrangement
* RJ61X: 8P8C, for four telephone lines
* RJ21X: 50-pin miniature ribbon connector, for up to 25 lines
[/quote:49e8692f24]
AKA "Amphenol Blue Ribbon" family. Its the 50 pin version of what
people call the "Centronics" connector.
[quote:49e8692f24]* RJ2MB: 50-pin miniature ribbon connector, 2-12 telephone lines
with make-busy
* RJ31X: 8P8C (although usually only 4C are used), allows an alarm
system to seize the telephone line to make an outgoing call during an
alarm. Jack is placed ahead of all other equipment.
* RJ38X: 8P8C, similar to RJ31X, with continuity circuit
[/quote:49e8692f24]
I was teaching telephone company workers the proper way to install the
31 and 38 in the mid '70s. They insisted on revering the pairs, so that
when the line was seized it seized the house phones instead of the CO
line.
[quote:49e8692f24]* RJ41S: 8P8C keyed, for one data line, universal
* RJ26X: 50-pin miniature ribbon connector, for multiple data lines,
universal
* RJ27X: 50-pin miniature ribbon connector, for multiple data lines,
programmed
* RJ48S: 8P8C, for four-wire data line (DDS)
* RJ48C: 8P8C, for four-wire data line (DSX-1)
* RJ48X: 8P8C with shorting bar, for four-wire data line (DS1)
* RJ49C: 8P8C, for ISDN BRI via NT1
* RJ71C: 12 line series connection using 50 pin connector (with
bridging adapter) ahead of customer equipment. Mostly used for call
sequencer equipment.
* RJ45S: 8P2C + keyed, for one data line with programming resistor
"Unofficial" (incorrect) plug names
These "RJ" names do not really refer to truly existing FCC RJ types:
* "RJ9", "RJ10", "RJ22": 4P4C or 4P2C, for telephone handsets. Since
telephone handsets do not connect directly to the public network, they
have no Registered Jack code whatsoever.
* "RJ45": 8P8C, informal designation for T568A/T568B, including
Ethernet; not the same as the true RJ45/RJ45S
* "RJ50": 10P10C, for data
DB connector
A family of plugs and sockets widely used in communications and computer
devices. DB connectors come in 9, 15, 25, 37 and 50-pin sizes. The DB
connector defines the physical structure of the connector, not the
purpose of each line.
D-subminiature connectors were invented by ITT Cannon , part of ITT.
Cannon's part-numbering system uses a D as the prefix for the whole
series, followed by a letter denoting the shell size (A=15 pin, B=25
pin, C=37 pin, D=50 pin, E=9 pin), followed by the actual number of
pins, followed by the gender (M=male, F=female). For example, DB25M
denotes a D-sub with a 25-pin shell size and 25 male contacts. The pins
in these connectors are spaced approximately 0.108 inch (2.74 mm) apart
with the rows spaced 0.112 inch (2.84 mm) apart.
[/quote:49e8692f24]
You don't see the contradiction in these poorly written paragraphs?
First it calls ALL of the connectors "DB", then gives the actual letters
for the different shell sizes. There are also connector wit coaxial
inserts that use the same metal shells that were designed by Cannon.
<http://www.ittcannon.com/support/getliterature.asp?pid=10040&pname=Standard+D+%28Stamped%29>
<http://www.ittcannon.com/support/getliterature.asp?pid=10033&pname=Combo+D+%28Connectors%29>
[quote:49e8692f24]There are now D-sub connectors which have the original shell sizes, but
more pins, and the names follow the same pattern. For example, the DE15,
usually found in VGA cables, has 15 pins in a shell the same size as a
DE9. The full list of connectors with this pin spacing is: DE15, DA26,
DB44, DC62, and DD78. Alternatively, following the same confusion
mentioned above in which all D-sub connectors are called "DB", these
connectors are often called DB15HD, DB26HD, DB44HD, DC62HD, and DD78HD,
where the "HD" stands for "high density". They all have 3 rows of pins,
except the DD78, which has 4.
A series of D-sub connectors with even denser pins is called "double
density", and consists of DE19, DA31, DB52, DC79, and DD100. They have 4
rows of pins.
There is yet another similar family of connectors that is easy to
confuse with the D-sub family, but is not part of it. These connectors
are named like "HD50" and "HD68", and have a D-shaped shell but the
shell is about half the width of a DB25. They are common in SCSI
attachments.
[/quote:49e8692f24]
From: <http://www.interfacebus.com/Design_Connector_SCSI.html#f> (I
don't agree with all his descriptions, as he is trying to write for the
lowest common denominator)
SCSI-I ~ Centronics 50 pin connector, 0.10 inch spacing, with 0.05 inch
ribbon cable. [CN50], or a DB37 connector.
SCSI-II ~8 bit data over a Micro D 50 pin, high density (50 mil), 16 bit
data over a Micro D 68 pin (50 mil) [HD50]
SCSI-III ~ 8 bit data over a Micro D 50 pin, high density (50 mil), 16
bit data over a Micro D 68 pin (50 mil) [HD68, HPDB68]. The connector is
2 rows by 34 pins, spaced on 0.05 inch centers. Also calls out an 80 pin
connector. The connectors may be shielded or un-shielded (Plastic
shrouded header).
SCSI-V ~ uses a VHDCI connector [Very High Density Cable Interconnect];
28AWG double-shielded twisted-pair cabling, .8mm 68-pin molded
connectors.
Embedded SCSI-1, SCSI-2 and Ultra-SCSI may also be found on a 50-pin
male header, so the cable would be a 50-pin female IDE flat ribbon cable
[IDC50]. SCSI-1 may also be found on a DB25 connector. Some Apple
products may have an HDI-30 connector.
--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.
Michael A. Terrell
Central Florida |
|
|
| Back to top |
|
|
|
| Michael A. Terrell... |
| Posted: Thu Dec 21, 2006 6:37 pm |
|
|
|
Guest
|
Karl Uppiano wrote:
[quote:628563c351]
Wikipedia is very good about disambiguation. When I did a Wikipedia search
on "DB9 connector", I got this: http://en.wikipedia.org/wiki/DB9
DB9 or DB-9 may refer to:
Aston Martin DB9 British sports car.
DE-9 connector, a common type of D-subminiature electrical connector
(often mistakenly called DB-9).
I think that is *exactly* the correct response. That is how salespeople at
high tech outlets should be trained to respond.
[/quote:628563c351]
They are trained to smile and run the register. Nothing more. Its
nothing new. I started seeing these problems at electronic distributors
about 30 years ago. A clerk yelling at me that I didn't know what the
hell I was talking about, that the part had never been made. When he
finally shut up I asked him to turn around and "Give me that thing with
the red label that's on the wall right behind you".
[quote:628563c351]Tell me the truth. If you had several people applying for a job. One
knew the proper names of a pile of components spread out on the table,
wouldn't you think they knew more of what they were doing, and that they
could be taught new things easier than the vague type who says "Its a
got a couple thingamajigs, and fourteen doohickeys?"
I'm not a terminology nazi. I would not disqualify a candidate if they
called a DE-9 a DB9, if on balance, they knew their stuff. They get extra
points if they say "It's a DE-9, often mistakenly called DB-9".
[/quote:628563c351]
So you would give preference, if all other things are equal?
[quote:628563c351]Any day you don't learn SOMETHING, was wasted.
I have no problem with that.
[/quote:628563c351]
We had 14 differed DE-9 connectors in stock for different products,
and to service older generations of equipment. We used metal and
plastic, machine screw, jack screw, and snap lock types. Different body
depths for different PC boards,
It was an engineer to order telemetry company with base product
models that were built to the customer's demanding requirements. We had
no choice but to teach the employees and purchasing about components.
We had to watch purchasing, because distributors would try to sub a
similar part "At a better price", but the part was on the list as a
qualified component.
Do you have any idea of the damage to your company's reputation if
NASA has to return your product for service if it fails on the space
station, or aboard a shuttle. Even worse: If one of the command
destruct receivers failed, and a rocket can't be destroyed after it goes
off course?
As far as the newsgroups go, more people should say, "Oh, you're
looking for a ..." and continue to use the proper terminology.
--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.
Michael A. Terrell
Central Florida |
|
|
| Back to top |
|
|
|
| Michael A. Terrell... |
| Posted: Thu Dec 21, 2006 9:33 pm |
|
|
|
Guest
|
Karl Uppiano wrote:
[quote:65146a3f80]
The reason the Radio Shack drones don't know them by their proper name *or*
by their common name is because they don't work with them or with people who
use them. They look up what amounts to a verbal typo, and not finding
anything, they draw a blank. Radio Shack will sell more parts if they were
clued in to the fact that some people call them by the "common" name, and
cross reference them, just like Wikipedia does. It's so simple, and it's
just good business.
[/quote:65146a3f80]
That is just it. Radio Shack now considers anything other than cell
phones or consumer toys a nuisance, and are phasing out the components.
It is probably the lowest ROI of anything they sell. It takes more time
to find and sell a 99 cent part than a cell phone contract. that
business is going away, and has been for the last 30 years. I watched
store after store close, distributors close branches, and convert their
main branch to industrial/OEM sales only. For instance, Pioneer used to
be Pioneer/Standard, AKA SREPCO, (Standard Radio and Electronics Parts
CO.) with quite a few branches that supported both repair shops and
hobbyists. Over a few years they closed all but their main locations and
went industrial/OEM only. No more walking in and buying a couple
resistors, or a few parts for a buck or two. Some locations had been
there for forty years. I had an open account for 15 years when it
happened, and they wouldn't even talk to me after the changes were
made. About forty different companies either died, changed focus or
went industrial/OEM only in SW Ohio, alone.
--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.
Michael A. Terrell
Central Florida |
|
|
| Back to top |
|
|
|
| Michael A. Terrell... |
| Posted: Wed Dec 27, 2006 1:09 pm |
|
|
|
Guest
|
Jim Douglas wrote:
[quote:81aee15645]
I believe more folks would know it as DB-9 than the "correct" name!
[/quote:81aee15645]
And that is the problem. The "Dumbing down" of the entire world.
--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.
Michael A. Terrell
Central Florida |
|
|
| Back to top |
|
|
|
| Radiosrfun... |
| Posted: Wed Dec 27, 2006 6:22 pm |
|
|
|
Guest
|
"Michael A. Terrell" <mike.terrell at (no spam) earthlink.net> wrote in message
news:4592A8E1.3E4FA222 at (no spam) earthlink.net...
[quote:da40b631b5]Jim Douglas wrote:
I believe more folks would know it as DB-9 than the "correct" name!
And that is the problem. The "Dumbing down" of the entire world.
--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.
Michael A. Terrell
Central Florida
[/quote:da40b631b5]
Michael, I'll disagree with you to a small degree. IF it is a DE 9 - then
the FACTORY should label it as such. It is not any harder to learn a part as
DE 9 as it would be a DB 9. The "FACTORIES" are at fault for
misrepresentation. You can't expect the general public to know other than
what they're taught. Ignorance breeds ignorance.
Lou |
|
|
| Back to top |
|
|
|
| Michael A. Terrell... |
| Posted: Wed Dec 27, 2006 11:22 pm |
|
|
|
Guest
|
Radiosrfun wrote:
[quote:6780f6385d]
Michael, I'll disagree with you to a small degree. IF it is a DE 9 - then
the FACTORY should label it as such. It is not any harder to learn a part as
DE 9 as it would be a DB 9. The "FACTORIES" are at fault for
misrepresentation. You can't expect the general public to know other than
what they're taught. Ignorance breeds ignorance.
[/quote:6780f6385d]
I have never seen one marked DB9 form a reputable manufacturer. From
tiny no name outfits in Japan, Taiwan and China? Yes.
OTOH, the factory ships in very large quantities, then "Joe Schmo's
computer supply and car wash" rips them out of the original packaging to
sell them as "Them their DB-9 cereal connector thingies" because that's
what his old drinking buddy called them.
--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.
Michael A. Terrell
Central Florida |
|
|
| Back to top |
|
|
|
|
|
All times are GMT - 5 Hours
The time now is Fri Nov 27, 2009 12:47 pm
|
|