Home made AC-AC power supply question

[mc]

Amid the volleys of verbal hostility here, did anyone solve the OP's actual
problem -- where to get a 9-volt 2.5-amp wall wart? He couldn't find one,
which is why he wanted to know about building his own power supply.

 

[Michael A. Terrell]

Jamie wrote:

Michael A. Terrell wrote:
Jamie wrote:

mc wrote:


"Clubsprint" <spamspamspamspam@nospam.com> wrote in message
news:fi5bv3$m8t$1@news-01.bur.connect.com.au...


"mc" <look@www.ai.uga.edu.for.address> wrote in message
news:Mjp1j.122$k27.110@bignews2.bellsouth.net...


Whoa... None of those is rated to deliver 2.5 amps. The biggest is 2.0
amps and will overheat in your application.


How about this one with the secondaries inn parallel?
http://www.altronics.com.au/index.asp?area=item&id=M5009


That's a fine transformer but more than you need. (One of the secondaries
by itself would be sufficient.)

When paralleling secondaries, be sure to use a voltmeter to check phasing.
For example, suppose A1 and A2 are the terminals of the first secondary, and
B1 and B2, of the second secondary. You propose to connect A1 to B1 and A2
to B2. To perform the test, go ahead and connect A1 to B1 but do not yet
connect B1 to B2. Instead, connect an AC voltmeter to B1 and B2. If you
see a very small voltage or none at all, go ahead and make the connection.
If you see double the secondary voltage, one of 'em is backward!



You're taking the fun out of it!



And you are being an ass. Safety first. You keep wanting to hurt or
kill people.


Excuse me?
At what point have I ever threaten to hurt some one?

Those kind of remarks can lead you into something you wish
you never stepped into.

Making accusations of a serious nature is really not the
route you want to go.
Like you are doing right now? Look, this is a beginners newsgroup,

where most posters have no idea of how to work safely and your stupid,
off hand comments don't help. What you think is funny can get someone
killed, because they don't understand.


Also, if you're going to make threats, MAKE DAMN SURE YOU CAN CARRY
THEM OUT.




--
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

 

[Bob Monsen]

"mc" <look@www.ai.uga.edu.for.address> wrote in message
news:%0M1j.876$L%6.831@bignews3.bellsouth.net...

Amid the volleys of verbal hostility here, did anyone solve the OP's
actual problem -- where to get a 9-volt 2.5-amp wall wart? He couldn't
find one, which is why he wanted to know about building his own power
supply.

http://www.excesssolutions.com/cgi-bin/category/10130

6 bucks.

 

[Clubsprint]

"Bob Monsen" <rcmonsen@gmail.com> wrote in message
newspl2j.2167$Dt4.602@newssvr19.news.prodigy.net...

http://www.excesssolutions.com/cgi-bin/category/10130

6 bucks.

Thanks Bob but I've already got one of those, Trouble is if I plug it into

the wall I very may
well have a fire/explosion/catastrophe. I'm in Australia, that's a 240Vac
50Hz supply. ;-)
Wish I could find one here for $6.

 

[Clubsprint]

"Phil Allison" <philallison@tpg.com.au> wrote in message
news:5qni5hF1140miU1@mid.individual.net...
as usual, a lot of abusive rubbish.
The transformer I'm looking at has passed the appropriate electrical safety
regulations as outlined
by EnergySafe Victoria. If you had looked at the specifications you would
have seen that.
The equipment was bought from US so it didn't come with a "compulsory safety
approved plug
pack".
It's funny that someone who holds himself in such high esteem lacks the
insight to entertain a
possibilty other than the obvious. I revel in your demonstrations that you
have the mountainous
wit and colossal acumen of a slug.
3amp 9v AC plug packs are not that easy to come by. If you want to point me
in the
direction of one for sub $30 please feel free.
BTW do you know what a "comb" filter is yet?
As usual you offer nothing to anyone other than useless abuse. You are a
pathetic dog
turd on the shoe of life. I just wish people wouldn't take the bait and
respond to you and
your ilk. A troll who is not fed dries up and blows away like the turd they
are.
It is awful that you find that your lonely, insignificant life wanking in
front of the PC so lacking in fulfillment.
Do you find that trolling newsgroups sates your desparate need for attention
and acknowledgement?
Very sad. BTW if you see a post by me please refrain from replying, you have
ably demonstrated
to me enough that you are a dolt, I need no more convincing.

** Buy an approved plug pack with that rating.

Those are not especially easy to find, hence his question.


** Bollocks - they are quite easy to find.


So do I get a 240v-9v transformer from the electronics shop and put it
in a case, attach the correct leads and I'm done.

** No - that is not safe.

I suppose an inline fuse might be a safety precaution.

** Fuses save equipment from fire - not people from electric shock.

The transformer you have cited is not safety approved for use as an
external PSU.

It is not short circuit proof and it does not have a thermal fuse.

Buy a 9 volt AC plug pack - it will cost far less anyhow.

Idiot.

By extension, are all people who build their own power supplies idiots?


** If they build ones to replace compulsory safety approved plug packs
that came with equipment AND pay more in the process - yes, they are
total idiots.



You do point out an important advantage of "wall-wart" type
transformers -- that, in general, they are designed so that when
short-circuited, they either do not overheat, or burn out without
generating enough heat to start a fire.

** That is not what I pointed out - you fucking MORON.

The * advantage * of the approved plug pack is that it will not
electrocute you.



However, with reasonable precautions (fuse, enclosure, etc.) I don't
think what this fellow is proposing to do is dangerous.


** Errrr - just how the fuck would a pig ignorant ASS like you know
??


He's only going to use it with a specific preamplifier, not connect it to
things at random.


** What irrelevant CRAP !!


And he's building one unit, not applying for safety certification.


** You are clearly not one tiny bit sane.

240 volt AC power is LETHAL.

What the fuckwit OP proposed is beyond stupid and ILLEGAL.

I hope it kills him.

I'm afraid it will kill someone else.




...... Phil

 

[Clubsprint]

"mc" <look@www.ai.uga.edu.for.address> wrote in message
news:k6w1j.283$mb.103@bignews9.bellsouth.net...
Hey thanks for your help mc.
Ignore the Troll.

"Phil Allison" <philallison@tpg.com.au> wrote in message
news:5qn9onF113rtoU1@mid.individual.net...

"Clubsprint"

I have a device requiring 9v AC 2.5 Amp.

** Buy an approved plug pack with that rating.

Those are not especially easy to find, hence his question.


So do I get a 240v-9v transformer from the electronics shop and put it
in a case, attach the correct leads and I'm done.

** No - that is not safe.

I suppose an inline fuse might be a safety precaution.

** Fuses save equipment from fire - not people from electric shock.

The transformer you have cited is not safety approved for use as an
external PSU.

It is not short circuit proof and it does not have a thermal fuse.

Buy a 9 volt AC plug pack - it will cost far less anyhow.

Idiot.

By extension, are all people who build their own power supplies idiots?

You do point out an important advantage of "wall-wart" type
transformers -- that, in general, they are designed so that when
short-circuited, they either do not overheat, or burn out without
generating enough heat to start a fire. However, with reasonable
precautions (fuse, enclosure, etc.) I don't think what this fellow is
proposing to do is dangerous. He's only going to use it with a specific
preamplifier, not connect it to things at random. And he's building one
unit, not applying for safety certification.

 

[Phil Allison]

"Clubsprint TOP POSTING UTTER FUCKWIT "

The transformer I'm looking at has passed the appropriate electrical
safety regulations as outlined by EnergySafe Victoria. If you had looked
at the specifications you would have seen that.

** This is the only one you quoted:

http://www.rsaustralia.com/cgi-bin/bv/rswww/searchBrowseAction.do?N=0&Ntk=I18NRSStockNumber&Ntt=347-2802&Nty=1&D=347-2802&callingPage=/jsp/line/line.jsp&BV_SessionID=@@@@0105272337.1196040341@@@@&BV_EngineID=ccdgaddmjddflihcefeceeldgondhgm.0&cacheID=auie&Nr=avl:au

RS Components cat: 347 - 2802

That German made model has no safety approvals from Victoria whatever.

It is merely a general purpose PCB mount equipment transformer.

It has not passed the stringent requirements for a plug pack transformer -
which are required BY LAW in every state to be tested by a standards lab and
approved for that purpose.

The equipment was bought from US so it didn't come with a "compulsory
safety approved plug pack".

** Totally irrelevant to the safety issue.

The original US 120 volt plug pak is not able to be legally sold in
Australia or most of the rest of the world.

The plug pak itself is the issue - not the item it came with.

It's funny that someone who holds himself in such high esteem lacks the
insight to entertain a
possibilty other than the obvious.

** You are one monstrously arrogant FUCKWIT with the manners of a pig.

3amp 9v AC plug packs are not that easy to come by. If you want to point
me in the direction of one for sub $30 please feel free.

** Your query was for a 9 volt, 2 or 2.5 amp plug pack.

WES Components in Ashfield sell a 10 volt 2.4 amp - which should be just
fine.

Cat No: ACA1024 for $18-50 trade = about $ 27 retail.

( That unsafe one from RS components is $36 plus the cost of a box and two
connecting leads. )

The makers of the original Rocktron item, or their Australian agents (
Dynamic Music) may well be able to supply an Australian approved 240 volt
plug pack.


NB: What YOU propose is beyond stupid and ILLEGAL.

I hope it kills you.

I'm afraid it will kill someone else.




........ Phil

 

[Phil Allison]

"Clubsprint"


** DROP DEAD -


you vile TOP POSTING CUNTHEAD




........ Phil

 

[Clubsprint]

"Phil Allison" <philallison@tpg.com.au> wrote in message
news:5qunanF122qmvU1@mid.individual.net...

"Clubsprint TOP POSTING UTTER FUCKWIT "
Such poetry...do you kiss your mother with that mouth?

** This is the only one you quoted:

http://www.rsaustralia.com/cgi-bin/bv/rswww/searchBrowseAction.do?N=0&Ntk=I18NRSStockNumber&Ntt=347-2802&Nty=1&D=347-2802&callingPage=/jsp/line/line.jsp&BV_SessionID=@@@@0105272337.1196040341@@@@&BV_EngineID=ccdgaddmjddflihcefeceeldgondhgm.0&cacheID=auie&Nr=avl:au

RS Components cat: 347 - 2802

That German made model has no safety approvals from Victoria whatever.

It is merely a general purpose PCB mount equipment transformer.

It has not passed the stringent requirements for a plug pack transformer -
which are required BY LAW in every state to be tested by a standards lab
and approved for that purpose.

Actualy I also mentioned
http://www.altronics.com.au/index.asp?area=item&id=M5009
which would be a much better solution and conforms. It would have been great
if there was room in the box but alas.......

3amp 9v AC plug packs are not that easy to come by. If you want to point
me in the direction of one for sub $30 please feel free.
** Your query was for a 9 volt, 2 or 2.5 amp plug pack.
WES Components in Ashfield sell a 10 volt 2.4 amp - which should be just
fine.
Cat No: ACA1024 for $18-50 trade = about $ 27 retail.
Let's refine that, find me a source in Melbourne.

( That unsafe one from RS components is $36 plus the cost of a box and
two connecting leads. )
Yes, but I can use the one from Altronics and spend less than $30, or if I

search
hard enough I can probably find something considerably cheaper.

The makers of the original Rocktron item, or their Australian agents (
Dynamic Music) may well be able to supply an Australian approved 240 volt
plug pack.
Oh yes, at a highly inflated $60. What a rip.

NB: What YOU propose is beyond stupid and ILLEGAL.
What is wrong with building your own power supply?

It is the first thing you do in a TAFE electronics certificate course,
you build a powersupply/signal generator and even build the
transformer (cut out the plates bolt them together, wind the coils etc.).

I hope it kills you.

I'm afraid it will kill someone else.
....... Phil

What a maroon... rotflol

 

[Clubsprint]

"Phil Allison" <philallison@tpg.com.au> wrote in message
news:5qunaoF122qmvU2@mid.individual.net...

"Clubsprint"
** DROP DEAD -
you vile TOP POSTING CANTHREAD
....... Phil
He's like a car crash. You know you shouldn't but you just cant help

looking.
Thanks for the laughs.

 

[Phil Allison]

""Clubsprint TOP POSTING UTTER FUCKWIT "

Such poetry...do you kiss your mother with that mouth?

** Do you fuck yours with that tiny dick ?

The answer is obvious.

** This is the only one you quoted:

http://www.rsaustralia.com/cgi-bin/bv/rswww/searchBrowseAction.do?N=0&Ntk=I18NRSStockNumber&Ntt=347-2802&Nty=1&D=347-2802&callingPage=/jsp/line/line.jsp&BV_SessionID=@@@@0105272337.1196040341@@@@&BV_EngineID=ccdgaddmjddflihcefeceeldgondhgm.0&cacheID=auie&Nr=avl:au

RS Components cat: 347 - 2802

That German made model has no safety approvals from Victoria whatever.

It is merely a general purpose PCB mount equipment transformer.

It has not passed the stringent requirements for a plug pack
transformer - which are required BY LAW in every state to be tested by a
standards lab and approved for that purpose.

Actualy I also mentioned
http://www.altronics.com.au/index.asp?area=item&id=M5009
which would be a much better solution and conforms.

** It MOST CERTAINLY does NOT conform.

Stop pretending to have a CLUE what approval codes mean what.

Cos YOU FUCKING do not.

That toroidal model is HORRENDOUSLY unsafe for your purpose.

3amp 9v AC plug packs are not that easy to come by. If you want to point
me in the direction of one for sub $30 please feel free.

** Your query was for a 9 volt, 2 or 2.5 amp plug pack.
WES Components in Ashfield sell a 10 volt 2.4 amp - which should be just
fine.
Cat No: ACA1024 for $18-50 trade = about $ 27 retail.

Let's refine that, find me a source in Melbourne.

** WES will deliver items anywhere in Australia.

( That unsafe one from RS components is $36 plus the cost of a box and
two connecting leads. )

Yes, but I can use the one from Altronics and spend less than $30,

** SHAME how it is TOTALLY and UTTERLY y UNSAFE !!!!!!!

God, how I hope it kills an arsehole like YOU !

And not someone else.

The makers of the original Rocktron item, or their Australian agents (
Dynamic Music) may well be able to supply an Australian approved 240 volt
plug pack.

Oh yes, at a highly inflated $60. What a rip.

** What price a human life -

YOU FUCKING CRIMINAL ASS !!!!!!!

NB: What YOU propose is beyond stupid and ILLEGAL.

What is wrong with building your own power supply?

** In this kind of cases - it is horribly unsafe.

God, how I hope it kills you.

I'm afraid it will kill someone else.




....... Phil

 

[Phil Allison]

"Clubsprint "


** GO DROP DEAD -

YOU STINKING ASD FUCKED CRIMINAL ARSEHOLE !!!






....... Phil

 

[Phil Allison]

"terry Shithead"


( snip whole pile of verbal diarrhoea)


** FUCK the HELL OFF !!

YOU POSTURING, KNOW NOTHING, JERK OFF !!

You made no point, you have no case, you have no clue at all.

Only worse and more bollocks than the pig ignorant arrogant, fuckwit OP.


I sincerely hope you or one of your loved ones is electrocuted..

Then - just maybe - YOU will take the matter with a bit more
seriousness.

But I doubt it.

Cos you are obviously a drop dead cunt.




........ Phil

 

[terryS]

On Nov 26, 3:10 am, "Phil Allison" <philalli...@tpg.com.au> wrote:

"Clubsprint "

** GO DROP DEAD -

YOU STINKING ASD FUCKED CRIMINAL ARSEHOLE !!!

....... Phil

Forget the egotistical insults! Reminiscent of the schoolyard they add
nothing, and are not even amusing. Small minds .... etc. Probably
originated by some whose only tactic is to become abusive and
offensive when anyone questions how something they have written down
is understood or misunderstood.

Unfortunately they are the ones who start dissent. With a "My way or
no way" mentality. And then? "Oops; I was wrong, but I ain't going to
admit it"!

Suggestion to all posters: Don't respond; saves lot of time! It is one
old the oldest (unsuccessful) tricks in the world to throw doubt on
someones argument/opinion by insulting the individual. Calling them,
for example a 'moron' or an 'axxhoxe' etc. Means nothing! Most of us
have been called worse, by better people!

Unfortunately a lot of those populating these various news groups do
not think, or know anything beyond or of outside North America. Thus
they judge everything by USA (or Canadian, or perhaps Mexican
standards). Seeming to think there is no other way.

And even if they are North American their grasp and understanding of a
good English vocabulary as spoken elsewhere in the world is sometimes
a little suspect?

Incidentally North America itself also domestically uses 240 volts (60
hertz), along with 120 volts, for heavier appliances etc. while much
of the rest of the world use 240 volts for everything. Advantages to
both systems.

Even btw a 60 hertz transformer labelled as from the USA may actually
have been manufactured in China, or Korea, Singapore or somewhere!
Much of it is! Especially if bought through large US based retailers
such as Wal Mart, Costco or Radio Shack (Tandy). Guess there must be
equivalent Australian/New Zealand retailers?

Good luck to the original poster; provided not totally confused by all
the misunderstood 120 volt information. The basic question; what was
it, an output of 9 volts AC (RMS) at 2.5 amps (only 22 watts or
thereabouts) should be easy enough to to provide. A modified auto
battery charger transformer especially it its got a low charge current
tap might do it?

But depends on the knowledge, tools and resources of the individual to
hook it up safely; with as recommended a small fuse in the input
primary of the transformer.

 

[Doug Miller]

In article <decb1ad5-d588-45c3-8682-f07fe64410e5@s19g2000prg.googlegroups.com>, terryS <tsanford@nf.sympatico.ca> wrote:

On Nov 26, 3:10 am, "Phil Allison" <philalli...@tpg.com.au> wrote:
"Clubsprint "

** GO DROP DEAD -

YOU STINKING ASD FUCKED CRIMINAL ARSEHOLE !!!

....... Phil


Unfortunately a lot of those populating these various news groups do
not think, or know anything beyond or of outside North America. Thus
they judge everything by USA (or Canadian, or perhaps Mexican
standards). Seeming to think there is no other way.

Note that this particular jerk is from Australia... (see the .au TLD?)

 

[Phil Allison]

"Doug Miller"


** DROP DEAD -


YOU PATHETIC SEPTIC ASSHOLE !!!




....... Phil

 

[Clubsprint]

"Doug Miller" <spambait@milmac.com> wrote in message
news:Ctz2j.77577$Um6.54130@newssvr12.news.prodigy.net...

Note that this particular jerk is from Australia... (see the .au TLD?)
Yeah he seems to be. Very untypical and quite an embarrasment

really.

 

[Clubsprint]

"mc" <look@www.ai.uga.edu.for.address> wrote in message
news:%0M1j.876$L%6.831@bignews3.bellsouth.net...

Amid the volleys of verbal hostility here, did anyone solve the OP's
actual problem -- where to get a 9-volt 2.5-amp wall wart? He couldn't
find one, which is why he wanted to know about building his own power
supply.

Thanks MC. You're info has been great.

One last question.
What calculation do I use to work out the current requirements
on the primary? So if the seconday is 9vAC 2.5Amps how do I know
what the current rwequired for the 240Vac primary?

 

[Ecnerwal]

In article <fifnd6$mmi$1@news-01.bur.connect.com.au>,
"Clubsprint" <spamspamspamspam@nospam.com> wrote:

What calculation do I use to work out the current requirements
on the primary? So if the seconday is 9vAC 2.5Amps how do I know
what the current rwequired for the 240Vac primary?

Volts * Amps = Volts * Amps (also equals Watts, but that's irrelevant
here)

So: 9 * 2.5 = 240 * X

so (9 * 2.5)/240 = X

so 22.5/240 = X

so 0.09375 = X but that's in Amps...

so about 94 milliamps, call it 100 or 125 mA (1/8 amp) to be on the safe
side (transformers are not 100% efficient).

Use a 1/4 amp fuse rated for 250V or more.

--
Cats, coffee, chocolate...vices to live by

 

[Doug Miller]

In article <fifjg4$j0s$1@news-01.bur.connect.com.au>, "Clubsprint" <spamspamspamspam@nospam.com> wrote:

"Doug Miller" <spambait@milmac.com> wrote in message
news:Ctz2j.77577$Um6.54130@newssvr12.news.prodigy.net...

Note that this particular jerk is from Australia... (see the .au TLD?)
Yeah he seems to be. Very untypical and quite an embarrasment
really.

No worries. I think everyone understands that he's a "special case", and
so we don't ascribe his peculiar characteristics to all Aussies in general.


--
Regards,
Doug Miller (alphageek at milmac dot com)

It's time to throw all their damned tea in the harbor again.