24 May
2007
24 May
'07
12:26 a.m.
Not 10 years old, but definitely counts as unusual hardware... I
bought a Dolch A320T ruggedized laptop at Dayton from a friend who was
in from NJ and selling a few rows away from Dan Cohoe, but part of the
reason it was so in expensive was that it didn't have an AC adapter.
The laptop came with a hand-fashioned bit of cut PCB with leads, meant
to plug into a lab-top bench supply (19V @ ~3A), but I'd like to at
least get a "real" plug for it. The problem is that while it looks
like an "ordinary" 2.5mm co-ax DC power connector, the center pin is
mighty fat. My question is, how does one describe these sorts of
connectors in enough detail to get the right part when ordering one?
A standard, modern Dell PA-12-type brick pumps out 19.5V @ 3.33A, so
that's not so much of an issue, just locating a mating connector is.
Thanks for any help determining how to describe this.
-ethan
24 May
24 May
2:43 a.m.
Ethan Dicks wrote:
Not 10 years old, but definitely counts as unusual
hardware... I
bought a Dolch A320T ruggedized laptop at Dayton from a friend who was
in from NJ and selling a few rows away from Dan Cohoe, but part of the
reason it was so in expensive was that it didn't have an AC adapter.
The laptop came with a hand-fashioned bit of cut PCB with leads, meant
to plug into a lab-top bench supply (19V @ ~3A), but I'd like to at
least get a "real" plug for it. The problem is that while it looks
like an "ordinary" 2.5mm co-ax DC power connector, the center pin is
mighty fat. My question is, how does one describe these sorts of
connectors in enough detail to get the right part when ordering one?
A standard, modern Dell PA-12-type brick pumps out 19.5V @ 3.33A, so
that's not so much of an issue, just locating a mating connector is.
Thanks for any help determining how to describe this.
No idea if it's standard outside RatShack, but they use letter
designations for the various sizes:
http://www.radioshack.com/family/index.jsp?categoryId=2032284&cp=203205…
Doc
6:28 p.m.
> that's not so much of an issue, just locating
a mating connector is.
>
> Thanks for any help determining how to describe this.
The 3 dimensions that are normally quoted are the diameter of the centre
pin on the chassis connector, the overall diameter of the cable-mounted
connector, and tength of the barrel on the latter. Normally the first is
sufficient to identify the conenctor
No idea if it's standard outside RatShack, but they use letter
designations for the various sizes:
I dnon't think it's a true standard, but Maplin (UK hobbyist 'electornic'
shop) have a similar code. They sell little adapters with a different
type of coaxial poeer plug on one side and 2 pins on the other. These
plug into the cable from a wall-wart type of adapter (they fit both ways
round so you cna get eiother polarity on the coaxial plug). They also
sell a cable with the necessary 2-pin socekt on one end and IIRC nothing
on the other end.
I bought just about all the adapters, and one of the cables. I fitted the
latter with a couple of 4mm plugs to go into my bench power supply. That
little kit has proved very useful for powering up all sorts of things.
-tony
8:52 a.m.
On Wed, 2007-05-23 at 20:26 -0400, Ethan Dicks wrote:
like an "ordinary" 2.5mm co-ax DC power
connector, the center pin is
mighty fat. My question is, how does one describe these sorts of
Maplin do these, but they're just described as "Power Connector". Is it
the same size as the ones used on Toshiba laptops?
Gordon
1:22 p.m.
On 5/24/07, Gordon JC Pearce <gordon at gjcp.net> wrote:
On Wed, 2007-05-23 at 20:26 -0400, Ethan Dicks wrote:
I think it's larger than that. I have what I thought was a large-bore
power connector, but it doesn't come close to fitting. I'm just
stumped at how to spec and order something that's a bit off the
charts. I saw the Radio Shack catalog entries, and, while the letter
scheme was new to me, I could recognize all the parts shown. This
center pin is substantially fatter than an ordinary "2.5mm" plug, but
the OD looks about the same.
-ethan
like an "ordinary" 2.5mm co-ax DC power
connector, the center pin is
mighty fat. My question is, how does one describe these sorts of
Maplin do these, but they're just described as "Power Connector". Is it
the same size as the ones used on Toshiba laptops?
1:45 p.m.
On Thu, 2007-05-24 at 09:22 -0400, Ethan Dicks wrote:
On 5/24/07, Gordon JC Pearce <gordon at
gjcp.net> wrote:
The centre pin on Toshiba laptop power connectors is about 3mm, way
bigger than the normal "fat" power connectors. The outside is the same.
Gordon
On Wed, 2007-05-23 at 20:26 -0400, Ethan Dicks
wrote:
I think it's larger than that. I have what I thought was a large-bore
power connector, but it doesn't come close to fitting. I'm just like an "ordinary" 2.5mm co-ax DC power
connector, the center pin is
mighty fat. My question is, how does one describe these sorts of
Maplin do these, but they're just described as "Power Connector". Is it
the same size as the ones used on Toshiba laptops?
2:17 p.m.
On 5/24/07, Gordon JC Pearce <gordon at gjcp.net> wrote:
On Thu, 2007-05-24 at 09:22 -0400, Ethan Dicks wrote:
Hmm... I could believe it's a full 3mm. I'll do some digging on that.
If Toshiba's have a 19V 3A brick, that'd probably do the trick.
Targus sells various laptop adapter kits, but they cost more than the
laptop (as do just Dolch drive bays, but fortunately, mine has one).
Thanks,
-ethan
On 5/24/07, Gordon JC Pearce <gordon at
gjcp.net> wrote:
The centre pin on Toshiba laptop power connectors is about 3mm, way
bigger than the normal "fat" power connectors. The outside is the same.
Maplin do these, but they're just described
as "Power Connector". Is it
the same size as the ones used on Toshiba laptops?
I think it's larger than that. I have what I thought was a large-bore
power connector, but it doesn't come close to fitting. I'm just
8:59 p.m.
The centre pin
on Toshiba laptop power connectors is about 3mm, way
bigger than the normal "fat" power connectors. The outside is the same.
Hmm... I could believe it's a full 3mm. I'll do some digging on that.
25 May
25 May
9:18 a.m.
On Thu, 2007-05-24 at 21:59 +0100, Tony Duell wrote:
JVC used a 3.xxx mm diameter pin coaxial power connector on some of their
portable VCR stuff. I have a portable Umatic machine that takes a
lead-acid battey with suck a plug on the cable. I know I bought a
suitable connector from Maplin (so I could make up my own battery packs),
but it has probably been disocntinued by now :-(
I'm surprised you didn't do something clever with brass tubing and
heatshrink ;-)
Gordon
The centre pin on Toshiba laptop power connectors is
about 3mm, way
bigger than the normal "fat" power connectors. The outside is the same.
Hmm... I could believe it's a full 3mm. I'll do some digging on that.
11:12 p.m.
JVC used a
3.xxx mm diameter pin coaxial power connector on some of their
portable VCR stuff. I have a portable Umatic machine that takes a
lead-acid battey with suck a plug on the cable. I know I bought a
suitable connector from Maplin (so I could make up my own battery packs),
but it has probably been disocntinued by now :-(
I'm surprised you didn't do something clever with brass tubing and
heatshrink ;-)
26 May
26 May
4:01 p.m.
On 5/25/07, Tony Duell <ard at p850ug1.demon.co.uk> wrote:
These days I probsbly would grab some brass rod, some
plastic rod, and
start turning :-) Although I'd make darn sure I couldn't get the right
part first.
Since the OP didn't seem to have any way to measuer the centre pin, I
assumed he didn't haev a lathe either.
I do not have a lathe, nor most of what folks would associate with a
machine shop (just a cheap Chinese drill press and some hand tools).
I have ordered a Targus universal adapter kit that is documented as
being able to provide 19VDC at over 3A. It has a set of random tips
with it. We'll see what's in the box first, in case there's a
compatible "Toshiba" tip in the pile.
-ethan
24 May
24 May
3:46 p.m.
On Wednesday 23 May 2007 20:26, Ethan Dicks wrote:
The problem is that while it looks like an
"ordinary" 2.5mm co-ax DC power
connector, the center pin is mighty fat. My question is, how does one
describe these sorts of connectors in enough detail to get the right part
when ordering one?
Wikipedia seems to have a pretty good list of these connectors...
--
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space, ?a critter that can
be killed but can't be tamed. ?--Robert A. Heinlein, "The Puppet Masters"
-
Information is more dangerous than cannon to a society ruled by lies. --James
M Dakin
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ard＠p850ug1.demon.co.uk -
doc＠mdrconsult.com -
ethan.dicks＠gmail.com -
gordon＠gjcp.net -
rtellason＠verizon.net