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power supply male jacks?
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mc
electronics forum Guru


Joined: 29 Dec 2005
Posts: 475

PostPosted: Wed Jul 19, 2006 4:18 pm    Post subject: Re: power supply male jacks? Reply with quote

<datakoll@yahoo.com> wrote in message
news:1153165103.099209.137290@h48g2000cwc.googlegroups.com...
Quote:

I need an AC power supply for an analog 5 watt telephone. Are the
different sizes and colors of male power jacks fixed to specific power
levels as an agreed on industry standard? That is, if a male jack fits
my phones' female power input, do I have a match for power needed and
power supplied?

NO!!!
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Richard Crowley
electronics forum Guru Wannabe


Joined: 01 May 2005
Posts: 135

PostPosted: Wed Jul 19, 2006 1:47 pm    Post subject: Re: power supply male jacks? Reply with quote

"William Sommerwerck" wrote ...
Quote:
Sounds a little hermaphroditic.

The most-common type of power connector for consuer
equipment is hermaphroditic.

Not by the current definition of "hermaphroditic" as
applied to connectors. Hermaphroditic means that the
connector will mate with itself, aka "genderless".

The typical consumer coaxial power connector is
not "hermaphroditic". It will not mate with itself.

The "GR" (General Radio) RF connector is an example
of a hermaphroditic connector. I use Anderson Powerpole
connectors for low-voltage DC (12 VDC) for my ham
equipment as it is becoming the standard, especially for
emergency setups where people all bring their different
equipment (and power sources) together.
http://www.andersonpower.com/products/pp/sp.html

The *pins* of those Elco-Edac connectors used in
some multi-pair connectors (like the old SVHS-
tape ADAT) are hermaphroditic, but the shells
are not. Those old-old "mic connectors" with a blob
of solder in the middle and a 5/8-27 threaded ring
are semi-hermaphroditic, but you have to un-screw
the threaded ring from one of them to mate them.
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William Sommerwerck
electronics forum beginner


Joined: 11 Feb 2005
Posts: 8

PostPosted: Wed Jul 19, 2006 11:09 am    Post subject: Re: power supply male jacks? Reply with quote

Quote:
Sounds a little hermaphroditic.

The most-common type of power connector for consuer equipment is
hermaphroditic.
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Arny Krueger
electronics forum addict


Joined: 13 Jun 2005
Posts: 69

PostPosted: Tue Jul 18, 2006 4:48 pm    Post subject: Re: power supply male jacks? Reply with quote

<datakoll@yahoo.com> wrote in message
news:1153168840.736676.301880@s13g2000cwa.googlegroups.com

Quote:
if radio shack sez the unit supplies x amps and z volts
then the buyer is reasonably certain this will be true?

IME, yes.

RS just has their wall-warts custom made by some of the usual suspects. They
tend to be about average quality, which is true of just about everybody
else.

Quote:
a level of maybe performance at a reasonable price?

Other good sources include Jameco.
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T Shadow
electronics forum beginner


Joined: 02 Jul 2006
Posts: 2

PostPosted: Tue Jul 18, 2006 3:47 pm    Post subject: Re: power supply male jacks? Reply with quote

"Laurence Payne" <lpayne1NOSPAM@dslDOTpipexDOTcom> wrote in message
news:8sjpb2tc1kcd13u88ve6f9903tibo6s66h@4ax.com...
Quote:
On Tue, 18 Jul 2006 03:27:41 +0100, Eeyore
rabbitsfriendsandrelations@REMOVETHIS.hotmail.com> wrote:

The jacks, by the way, are the holes; the male things are plugs.

So, what's a 'jackplug' then ? LOL !

A plug that goes into a jack.

Are you sure it's not a male jackelope?
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Eeyore
electronics forum Guru


Joined: 22 Jun 2006
Posts: 642

PostPosted: Tue Jul 18, 2006 2:24 pm    Post subject: Re: power supply male jacks? Reply with quote

Gareth Magennis wrote:

Quote:
"Eeyore" <rabbitsfriendsandrelations@REMOVETHIS.hotmail.com> wrote in
message news:44BC47BB.F8104CB7@REMOVETHIS.hotmail.com...


Frank Stearns wrote:

datakoll@yahoo.com writes:

if radio shack sez the unit supplies x amps and z volts
then the buyer is reasonably certain this will be true?
a level of maybe performance at a reasonable price?

Typically unregulated (at least the universal model), so at
lower-than-spec'd current draw from the device being supplied this
means that the voltage will tend to swing up. How much depends on the
actual load; whether this causes a problem or not will also depend on the
device being supplied.

If you're not in a rush and don't mind spending a few dollars more, you
might look at the regulated wall warts available from Mouser, Digikey,
etc. (RS might have such entities, but be prepared to pay way more than
they're worth.) Nice clean power, held pretty close. (Of course, if your
device wants AC, don't do this.)

Just to muddy the waters........

A DC adaptor will often work fine with an 'AC' input.

But you need to know what you're doing.

Graham

And to further muddy them - some equipment that has computing chips and
audio chips (eg an effects unit) that require an AC supply will boot up fine
if you use a DC supply, but will have no audio. This is because the 5 volts
required for the digital stuff will be generated OK but the plus and minus
supplies for the audio will not.

I came across a fingerprint scanner that had that kind of problem once.

Graham
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Laurence Payne
electronics forum beginner


Joined: 07 Jun 2005
Posts: 11

PostPosted: Tue Jul 18, 2006 12:09 pm    Post subject: Re: power supply male jacks? Reply with quote

On Tue, 18 Jul 2006 03:27:41 +0100, Eeyore
<rabbitsfriendsandrelations@REMOVETHIS.hotmail.com> wrote:

Quote:
The jacks, by the way, are the holes; the male things are plugs.

So, what's a 'jackplug' then ? LOL !

A plug that goes into a jack.
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St. John Smythe
electronics forum beginner


Joined: 15 Jun 2005
Posts: 37

PostPosted: Tue Jul 18, 2006 11:41 am    Post subject: Re: power supply male jacks? Reply with quote

Eeyore wrote:

Quote:
So, what's a 'jackplug' then ? LOL !

Sounds a little hermaphroditic.

--
St. John
You should never bet against anything in science at odds of more than
about 10^12 to 1.
-Ernest Rutherford
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Gareth Magennis
electronics forum beginner


Joined: 27 May 2005
Posts: 26

PostPosted: Tue Jul 18, 2006 11:29 am    Post subject: Re: power supply male jacks? Reply with quote

"cross I'd" <annonn@juno.com> wrote in message
news:1153203119.124204.93930@m79g2000cwm.googlegroups.com...
Quote:

"Scott Dorsey" wrote ...

No, there is nothing even remotely standard about those damn consumer
"coaxial power" connectors. Make sure that the nameplate voltage and
current on the unit and the wall wart match.

Richard Crowley wrote:

And make sure the polarity is correct, also. Not clear by "AC
power supply" whether you mean one that can be plugged into
the wall, or whether you meant that the phone actually uses some
AC voltage? Of course, if the phone uses AC, then you have no
concern about polarity.

While the overwhelming majority of these things may be
center pin positive _DO NOT_ make this assumption.
This falls into the "double check" category if you're going
to use a generic or universal replacement PS.

rd




Roland and Yamaha use opposite polarities to each other. Do not assume
anything. Ever.




Gareth.
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Gareth Magennis
electronics forum beginner


Joined: 27 May 2005
Posts: 26

PostPosted: Tue Jul 18, 2006 11:26 am    Post subject: Re: power supply male jacks? Reply with quote

"Eeyore" <rabbitsfriendsandrelations@REMOVETHIS.hotmail.com> wrote in
message news:44BC47BB.F8104CB7@REMOVETHIS.hotmail.com...
Quote:


Frank Stearns wrote:

datakoll@yahoo.com writes:

if radio shack sez the unit supplies x amps and z volts
then the buyer is reasonably certain this will be true?
a level of maybe performance at a reasonable price?

Typically unregulated (at least the universal model), so at
lower-than-spec'd current draw from the device being supplied this
means that the voltage will tend to swing up. How much depends on the
actual load; whether this causes a problem or not will also depend on the
device being supplied.

If you're not in a rush and don't mind spending a few dollars more, you
might look at the regulated wall warts available from Mouser, Digikey,
etc. (RS might have such entities, but be prepared to pay way more than
they're worth.) Nice clean power, held pretty close. (Of course, if your
device wants AC, don't do this.)

Just to muddy the waters........

A DC adaptor will often work fine with an 'AC' input.

But you need to know what you're doing.

Graham



And to further muddy them - some equipment that has computing chips and
audio chips (eg an effects unit) that require an AC supply will boot up fine
if you use a DC supply, but will have no audio. This is because the 5 volts
required for the digital stuff will be generated OK but the plus and minus
supplies for the audio will not.


Gareth.
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Laurence Payne
electronics forum beginner


Joined: 07 Jun 2005
Posts: 11

PostPosted: Tue Jul 18, 2006 10:02 am    Post subject: Re: power supply male jacks? Reply with quote

On 17 Jul 2006 23:11:59 -0700, "cross I'd" <annonn@juno.com> wrote:

Quote:
While the overwhelming majority of these things may be
center pin positive _DO NOT_ make this assumption.
This falls into the "double check" category if you're going
to use a generic or universal replacement PS.

Particularly as many units lack reverse-polarity protection. And not
only cheap gear. Give a Sony Walkman Professional reverse polarity and
you're instantly in for a repair bill. Unbelievable, unforgivable but
true.
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cross I'd
electronics forum beginner


Joined: 18 Jul 2006
Posts: 2

PostPosted: Tue Jul 18, 2006 6:11 am    Post subject: Re: power supply male jacks? Reply with quote

Quote:
"Scott Dorsey" wrote ...

No, there is nothing even remotely standard about those damn consumer
"coaxial power" connectors. Make sure that the nameplate voltage and
current on the unit and the wall wart match.

Richard Crowley wrote:

Quote:
And make sure the polarity is correct, also. Not clear by "AC
power supply" whether you mean one that can be plugged into
the wall, or whether you meant that the phone actually uses some
AC voltage? Of course, if the phone uses AC, then you have no
concern about polarity.

While the overwhelming majority of these things may be
center pin positive _DO NOT_ make this assumption.
This falls into the "double check" category if you're going
to use a generic or universal replacement PS.

rd
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cross I'd
electronics forum beginner


Joined: 18 Jul 2006
Posts: 2

PostPosted: Tue Jul 18, 2006 6:03 am    Post subject: Re: power supply male jacks? Reply with quote

Quote:
"St. John Smythe" <sinjen@n4vu.com> wrote:

The jacks, by the way, are the holes; the male things are plugs.

Steve King wrote:

Quote:
Except when the jacks have a male pin inside a hole and the plugs, which go
into the hole with the male pin, just has holes. We have gender uncertainty
issues here.

I might be tempted to call it androgenous,
certainly not bisexual since it doesn't "go both ways".

rd
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Eeyore
electronics forum Guru


Joined: 22 Jun 2006
Posts: 642

PostPosted: Tue Jul 18, 2006 2:30 am    Post subject: Re: power supply male jacks? Reply with quote

Frank Stearns wrote:

Quote:
datakoll@yahoo.com writes:

if radio shack sez the unit supplies x amps and z volts
then the buyer is reasonably certain this will be true?
a level of maybe performance at a reasonable price?

Typically unregulated (at least the universal model), so at
lower-than-spec'd current draw from the device being supplied this
means that the voltage will tend to swing up. How much depends on the
actual load; whether this causes a problem or not will also depend on the
device being supplied.

If you're not in a rush and don't mind spending a few dollars more, you
might look at the regulated wall warts available from Mouser, Digikey,
etc. (RS might have such entities, but be prepared to pay way more than
they're worth.) Nice clean power, held pretty close. (Of course, if your
device wants AC, don't do this.)

Just to muddy the waters........

A DC adaptor will often work fine with an 'AC' input.

But you need to know what you're doing.

Graham
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Eeyore
electronics forum Guru


Joined: 22 Jun 2006
Posts: 642

PostPosted: Tue Jul 18, 2006 2:27 am    Post subject: Re: power supply male jacks? Reply with quote

"St. John Smythe" wrote:

Quote:
datakoll@yahoo.com wrote:

I need an AC power supply for an analog 5 watt telephone. Are the
different sizes and colors of male power jacks fixed to specific power
levels as an agreed on industry standard? That is, if a male jack fits
my phones' female power input, do I have a match for power needed and
power supplied?

No. It would be nice, but whatever standardization may exist definitely
can't be counted on to keep from frying components. You should not just
check specs closely, but then re-check with a DVM or VOM to be sure
you're safe. Unregulated wall-wart supplies are almost uniformly
over-voltage, depending upon the load of what's being powered to bring
them into the right voltage range.

The jacks, by the way, are the holes; the male things are plugs.

So, what's a 'jackplug' then ? LOL !

Graham
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