Isolated, regulated, toroidal step down transformer AC power

[Mark]

Bullshit

"James" <dotatdot@tpigglet.com.au> wrote in message
news:46091d56@dnews.tpgi.com.au...

"Mark" <marknospampleaseilsley@dodo.com.au> wrote in message
news:46091546$0$24867$c30e37c6@pit-reader.telstra.net...
Yes, I really do need 9 VAC for my application.

Within the application, the 9 VAC is rectified, filtered, regulated (to
+15 VDC and -15 VDC) and then filtered again.

So the input needs to be regulated to within about (+ or -) 1% 9 VAC.


*** Thanks...thats the best laugh I've had for ages
I'm sure a single 9Vac supply will give you amazingly clean +/-15V rails,
you'd best make sure you get a 500W toroidal though, that'll help..

PMSL

James



"Mike" <erazmus@iinet.net.au> wrote in message
news:46081420$0$7449$5a62ac22@per-qv1-newsreader-01.iinet.net.au...
In article <4607c3d8$0$68247$c30e37c6@lon-reader.news.telstra.net>,
marknospampleaseilsley@dodo.com.au says...

Can anybody point me to a good design of same.

240 VAC in, 9 VAC out.

The closest thing in terms of a transformer that will be able to
provide 'some' regulation is a ferroresonant one. They were often
used 20 or more years ago but declined more quickly when the UPS
became cheaper.

The yare good at supply regulation but bad for noise and bad for
waveform distortion.

You dont really want to design a ferroresonant in a toroid unless
you want to spend a few weeks getting to grips with the material
properties and all the magnetics calculations and building many
prototypes.

Far better you just get a good SMPS.

But do you really need 9vac for your application or is that to feed
something else that could utilse DC more efficiently ?

or did phil write this so i can practice typing and get even more
proficient


--
Regards
Mike
* VK/VL Commodore FuseRails that wont warp or melt with fuse failure
indication
and now with auto 10-15 min timer for engine illumination option.
* VN, VP, VR Models with relay holder in progress.
* Twin Tyres to suit most sedans, trikes and motorcycle sidecars
http://niche.iinet.net.au

 

[Phil Allison]

"Mark Ilsley UTTER FUCKWIT "

Bullshit

** ROTFLMAO - this is absolutely bloody CLASSIC !!!

This ASININE, TOP POSTING, PITA DAMN FOOL

has just gotta be another ADD fucked cable installer !!!!

Like that " Spanky " complete moron from Melbourne.

What a bloody HOOOT !!!!!!!

Lets all keep the CRETIN on the fishing line as long as possible !!

What top entertainment !!



......... Phil

 

[Mark]

Incapable of argument.

"Phil Allison" <philallison@tpg.com.au> wrote in message
news:56smjlF29ngmtU1@mid.individual.net...

"Mark Ilsley UTTER FUCKWIT "


Bullshit



** ROTFLMAO - this is absolutely bloody CLASSIC !!!

This ASININE, TOP POSTING, PITA DAMN FOOL

has just gotta be another ADD fucked cable installer !!!!

Like that " Spanky " complete moron from Melbourne.

What a bloody HOOOT !!!!!!!

Lets all keep the CRETIN on the fishing line as long as possible !!

What top entertainment !!



........ Phil

 

[Trevor Wilson]

"Mark" <marknospampleaseilsley@dodo.com.au> wrote in message
news:46090d62$0$24861$c30e37c6@pit-reader.telstra.net...

I am trying to build a 240 VAC in (or even 110 VAC in, I really don't care)
9 VAC out, regulated (to 9 VAC) , isolated (from transformer), step down
transformer and AC power supply.

Input fused (at about 2 amps) but I could adapt just about any design to
about that current.

There...but I think I already said it, didn't I ..Let's see?

**WHAT IS THE APPLICATION?


--
Trevor Wilson
www.rageaudio.com.au



--
Posted via a free Usenet account from http://www.teranews.com

 

[Franc Zabkar]

On Tue, 27 Mar 2007 22:59:44 +1000, "Mark"
<marknospampleaseilsley@dodo.com.au> put finger to keyboard and
composed:

Yes, I really do need 9 VAC for my application.

Within the application, the 9 VAC is rectified, filtered, regulated (to +15
VDC and -15 VDC) and then filtered again.

So the input needs to be regulated to within about (+ or -) 1% 9 VAC.

Ask yourself, what is the peak value of a 9 VAC sine wave?

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

 

[Trevor Wilson]

"Mark" <marknospampleaseilsley@dodo.com.au> wrote in message
news:46092af2$0$24862$c30e37c6@pit-reader.telstra.net...

Incapable of argument.

**You have not told us what you are trying to accomplish. You can expect to
suffer derision, until you explain more fully what you are trying to do. A
regulated AC source is difficult to accomplish and usually unnecessary. A
regulated DC source is much easier.

You should also learn about top posting and why it is not a desirable method
of communication.


--
Trevor Wilson
www.rageaudio.com.au



--
Posted via a free Usenet account from http://www.teranews.com

 

[Rudolf]

Why not switch mode?

Rudolf

"Mark" <marknospampleaseilsley@dodo.com.au> wrote in message
news:46091546$0$24867$c30e37c6@pit-reader.telstra.net...

Yes, I really do need 9 VAC for my application.

Within the application, the 9 VAC is rectified, filtered, regulated (to
+15 VDC and -15 VDC) and then filtered again.

So the input needs to be regulated to within about (+ or -) 1% 9 VAC.

"Mike" <erazmus@iinet.net.au> wrote in message
news:46081420$0$7449$5a62ac22@per-qv1-newsreader-01.iinet.net.au...
In article <4607c3d8$0$68247$c30e37c6@lon-reader.news.telstra.net>,
marknospampleaseilsley@dodo.com.au says...

Can anybody point me to a good design of same.

240 VAC in, 9 VAC out.

The closest thing in terms of a transformer that will be able to
provide 'some' regulation is a ferroresonant one. They were often
used 20 or more years ago but declined more quickly when the UPS
became cheaper.

The yare good at supply regulation but bad for noise and bad for
waveform distortion.

You dont really want to design a ferroresonant in a toroid unless
you want to spend a few weeks getting to grips with the material
properties and all the magnetics calculations and building many
prototypes.

Far better you just get a good SMPS.

But do you really need 9vac for your application or is that to feed
something else that could utilse DC more efficiently ?

or did phil write this so i can practice typing and get even more
proficient


--
Regards
Mike
* VK/VL Commodore FuseRails that wont warp or melt with fuse failure
indication
and now with auto 10-15 min timer for engine illumination option.
* VN, VP, VR Models with relay holder in progress.
* Twin Tyres to suit most sedans, trikes and motorcycle sidecars
http://niche.iinet.net.au

 

[Trevor Wilson]

"Rudolf" <aus_electronics@rumatech.com> wrote in message
news:130j72ojmunqr55@corp.supernews.com...

Why not switch mode?

**Because the clown who posted the original request has not revealed why he
needs 9VAC. An SMPS is the worst way to generate AC in low draw
applications.


--
Trevor Wilson
www.rageaudio.com.au



--
Posted via a free Usenet account from http://www.teranews.com

 

[Phil Allison]

"Mark Ilsley UTTER FUCKWIT "

Incapable of argument.

Bullshit

** ROTFLMAO - this is absolutely bloody CLASSIC !!!

This ASININE, TOP POSTING, PITA DAMN FOOL

has just gotta be another ADD fucked cable installer !!!!

Like that " Spanky " complete moron from Melbourne.

What a bloody HOOOT !!!!!!!

Lets all keep the CRETIN on the fishing line as long as possible !!

What top entertainment !!



......... Phil

 

[rebel]

On Tue, 27 Mar 2007 22:59:44 +1000, "Mark" <marknospampleaseilsley@dodo.com.au>
wrote:

Yes, I really do need 9 VAC for my application.

Within the application, the 9 VAC is rectified, filtered, regulated (to +15
VDC and -15 VDC) and then filtered again.

which removes the need for any tight regulation of the 9VAC.

So the input needs to be regulated to within about (+ or -) 1% 9 VAC.

Nah, THAT's bullshit. (Hint: Just think for a moment what effect an increase or
decrease of 0.5V in your AC 9V will have on the REGULATED DC rails.)

 

[Mark]

I am not compelled to explain anything more than what I already have and
what I have explained is more than sufficient for my purpose.

This isn't rocket science. A minimal design AC source can be achieved with
only ONE component but the output is then at the mercy of the vagaries of
the input voltage.

A better design might involve transformation to a nominal VAC (+/- x%) ,
then rectification and regulation to a nominal DC (+/- y%<x) , filtering and
decoupling and then inversion back to 9 VAC (+/- 1%).

Even Google'sperts should be able to understand that.

"Trevor Wilson" <trevor@SPAMBLOCKrageaudio.com.au> wrote in message
news:46097c67$0$16282$88260bb3@free.teranews.com...

"Mark" <marknospampleaseilsley@dodo.com.au> wrote in message
news:46092af2$0$24862$c30e37c6@pit-reader.telstra.net...
Incapable of argument.


**You have not told us what you are trying to accomplish. You can expect
to suffer derision, until you explain more fully what you are trying to
do. A regulated AC source is difficult to accomplish and usually
unnecessary. A regulated DC source is much easier.

You should also learn about top posting and why it is not a desirable
method of communication.


--
Trevor Wilson
www.rageaudio.com.au



--
Posted via a free Usenet account from http://www.teranews.com

 

[Phil Allison]

"Mark Ilsley UTTER FUCKWIT "

I am not compelled to explain anything more than what I already have and
what I have explained is more than sufficient for my purpose.

** Fucking, know nothing IDIOTS like this arrogant PIG do NOT get to
decide what others should accept or believe.

This isn't rocket science. A minimal design AC source can be achieved with
only ONE component but the output is then at the mercy of the vagaries of
the input voltage.

** Funny how every piece of transformer isolated electronic and electrical
equipment made manages to do that, just fine.

But it ain't good enough for this PIG IGNORANT CRETIN !!

A better design might involve transformation to a nominal VAC (+/- x%) ,
then rectification and regulation to a nominal DC (+/- y%<x) , filtering
and decoupling and then inversion back to 9 VAC (+/- 1%).

** ROTFLMAO - this is absolutely bloody CLASSIC !!!

This ASININE, TOP POSTING, AUTISTIC DAMN FOOL

has just gotta be another ADD fucked cable installer !!!!

Like that " Spanky " complete moron from Melbourne.

What a bloody HOOOT !!!!!!!

Lets all keep the CRETIN on the fishing line as long as possible !!

What top entertainment !!




......... Phil

 

[Trevor Wilson]

"Mark" <marknospampleaseilsley@dodo.com.au> wrote in message
news:4609d90e$0$24862$c30e37c6@pit-reader.telstra.net...

I am not compelled to explain anything more than what I already have and
what I have explained is more than sufficient for my purpose.

**You don't have to explain anything. You won't get any help, either.

This isn't rocket science. A minimal design AC source can be achieved with
only ONE component but the output is then at the mercy of the vagaries of
the input voltage.

**Correct.

A better design might involve transformation to a nominal VAC (+/- x%) ,
then rectification and regulation to a nominal DC (+/- y%<x) , filtering
and decoupling and then inversion back to 9 VAC (+/- 1%).

**Except that it is ridiculously complex and unnecessary. If you would
explain what you are trying to do, then we can help you.

Even Google'sperts should be able to understand that.

**I suggest you Google the following: 'Top poster'.


--
Trevor Wilson
www.rageaudio.com.au



--
Posted via a free Usenet account from http://www.teranews.com

 

[Mark]

You are assuming that I had a perfect 9 VAC sine wave input to my
application. If I'd had what I wanted, I wouldn't need to ask the question.

What I DO have is an very imperfect NOMINAL 240 VAC, domestic supply, like
everybody else. (actually more imperfect than most, as we live in remote
rural area with many idiosyncrasies in the supply).

I can step down the domestic supply to (nominally) 9 VAC, but it suffers
exactly the same problems as the domestic supply. i.e. the output of the
transformer isn't 9 VAC and isn't a perfect sine wave.

"Franc Zabkar" <fzabkar@iinternode.on.net> wrote in message
news:vjui03trgj76p2j2plm8qrhc008ub5pemi@4ax.com...

On Tue, 27 Mar 2007 22:59:44 +1000, "Mark"
marknospampleaseilsley@dodo.com.au> put finger to keyboard and
composed:

Yes, I really do need 9 VAC for my application.

Within the application, the 9 VAC is rectified, filtered, regulated (to
+15
VDC and -15 VDC) and then filtered again.

So the input needs to be regulated to within about (+ or -) 1% 9 VAC.

Ask yourself, what is the peak value of a 9 VAC sine wave?

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

 

[Mark]

I see, and you do? (decide what others should accept or believe)

"Phil Allison" <philallison@tpg.com.au> wrote in message
news:56u4b6F29jpnoU1@mid.individual.net...

"Mark Ilsley UTTER FUCKWIT "


I am not compelled to explain anything more than what I already have and
what I have explained is more than sufficient for my purpose.


** Fucking, know nothing IDIOTS like this arrogant PIG do NOT get to
decide what others should accept or believe.



This isn't rocket science. A minimal design AC source can be achieved
with only ONE component but the output is then at the mercy of the
vagaries of the input voltage.


** Funny how every piece of transformer isolated electronic and electrical
equipment made manages to do that, just fine.

But it ain't good enough for this PIG IGNORANT CRETIN !!



A better design might involve transformation to a nominal VAC (+/- x%) ,
then rectification and regulation to a nominal DC (+/- y%<x) , filtering
and decoupling and then inversion back to 9 VAC (+/- 1%).


** ROTFLMAO - this is absolutely bloody CLASSIC !!!

This ASININE, TOP POSTING, AUTISTIC DAMN FOOL

has just gotta be another ADD fucked cable installer !!!!

Like that " Spanky " complete moron from Melbourne.

What a bloody HOOOT !!!!!!!

Lets all keep the CRETIN on the fishing line as long as possible !!

What top entertainment !!




........ Phil

 

[Phil Allison]

"Mark Ilsley = UTTER FUCKWIT "

You are assuming that I had a perfect 9 VAC sine wave input to my
application.

** No he is not - YOU FUCKING TENTH WIT !!

What I DO have is an very imperfect NOMINAL 240 VAC, domestic supply, like
everybody else.

** Then accept the fact that regulating the AC voltage is NOT required.


This ASININE, TOP POSTING, PITA DAMN FOOL

Just gotta be a school boy wanker.

What a bloody HOOOT !!!!!!!

Lets all keep the CRETIN on the fishing line as long as possible !!

What top entertainment !!



........ Phil

 

[Phil Allison]

"Mark Ilsley = UTTER FUCKWIT "

I see, and you do? (decide what others should accept or believe)

** Fucking, know nothing IDIOTS like this arrogant * PIG *

NEVER get to decide what others should accept or believe.

ROTFLMAO - this is absolutely bloody CLASSIC !!!

This ASININE, TOP POSTING, PITA DAMN FOOL

has just gotta be another ADD fucked PIC programmer !!!!

What a bloody HOOOT !!!!!!!

Lets all keep the CRETIN on the fishing line as long as possible !!

What top entertainment !!




......... Phil

 

[Mark]

Good boy, Trevor. At least you grasped that much. An SMPS is not an option
or I would have simply purchased one.

The reason WHY I need 9 VAC is because the application needs it and for
reasons that I have already explained.

I may post a schematic of the applications rectification, regulation and
filtering circuit, but I don't think this is necessary.

Most people can understand a statement like "240 VAC in, 9 VAC out",
regulated to a fine tolerance (Say 1%) and isolated from the toroidal step
down transformer.

Back to Goggle now, like a good little boy.


"Trevor Wilson" <trevor@SPAMBLOCKrageaudio.com.au> wrote in message
news:4609a248$0$16407$88260bb3@free.teranews.com...

"Rudolf" <aus_electronics@rumatech.com> wrote in message
news:130j72ojmunqr55@corp.supernews.com...
Why not switch mode?


**Because the clown who posted the original request has not revealed why
he needs 9VAC. An SMPS is the worst way to generate AC in low draw
applications.


--
Trevor Wilson
www.rageaudio.com.au



--
Posted via a free Usenet account from http://www.teranews.com

 

[Phil Allison]

"Mark Ilsley = UTTER FUCKWIT LIAR "

The reason WHY I need 9 VAC is because the application needs it and for
reasons that I have already explained.

** YOU have not explained any such thing -

YOU STINKING AUTISTIC LIAR

I may post a schematic of the applications rectification, regulation and
filtering circuit, but I don't think this is necessary.

** If it already has a " regulation " circuit, the incoming AC does not
also need regulation

- YOU FUCKING TENTH WIT !!!!!!!!!!!!!!

Most people can understand a statement like "240 VAC in, 9 VAC out",
regulated to a fine tolerance (Say 1%) and isolated from the toroidal
step down transformer.

** It's purest gobbledegook.


ROTFLMAO - this is absolutely bloody CLASSIC !!!

This ASININE, TOP POSTING, PITA DAMN FOOL

has just gotta be another ADD fucked PIC programmer !!!!

What a bloody HOOOT !!!!!!!

Lets all keep the CRETIN on the fishing line as long as possible !!

What top entertainment !!




......... Phil

 

[Mark]

That is an astounding case of the Kettle calling the Pot, "black".

You just accused me of "arrogance" for NOT supplying information (on my
application for the requested design) whilst arguing that your own arrogance
is in fact a power to "decide what others should accept or believe", earned
on the basis of what?

You will claim superior knowledge and experience, but YOUR superior
knowledge experience CAN NOT make ME arrogant, and that is by definition.

Quite to the contrary, it makes your statement look arrogant because you
appear to believe that the power to "decide what others should accept or
believe" is something that can be EARNED by superior knowledge and
experience. That is; it exists AS A RIGHT that can be earned.

No doubt this proposition is TRUE inside THIS newsgroup or it may even be
true inside ALL newsgroups, but it is not true in the wider realm of human
relations or the law, because it is in conflict with the basic tenant of an
individuals free will.

In exercising that free will, I have the right NOT to divulge any
information I consider private (or for any other undisclosed reason) and I
will not let you twist the exercise of that option into an allegation of
arrogance, just as you have attempted to do.

To make that accusation under these specific circumstances is an
abomination.

To infer, by the argument that you have made, that the power to "decide what
others should accept or believe" exists at all as a RIGHT, which can be
earned, is an intrinsically arrogant position to take. It is one that
suppresses all decent.

Can you think of anyone in this newsgroup who suppresses all decent?


"Phil Allison" <philallison@tpg.com.au> wrote in message
news:56u5ltF287ut2U1@mid.individual.net...

"Mark Ilsley = UTTER FUCKWIT "


I see, and you do? (decide what others should accept or believe)


** Fucking, know nothing IDIOTS like this arrogant * PIG *

NEVER get to decide what others should accept or believe.

ROTFLMAO - this is absolutely bloody CLASSIC !!!

This ASININE, TOP POSTING, PITA DAMN FOOL

has just gotta be another ADD fucked PIC programmer !!!!

What a bloody HOOOT !!!!!!!

Lets all keep the CRETIN on the fishing line as long as possible !!

What top entertainment !!




........ Phil