Getting matching transformer from telephone

[Phil Allison]

"Bill Janssen"

Impedance for an un-loaded pair varies with frequency. So at DSL
frequencies the impedance
is 100 to 110 Ohms. But for telephone use They preferred to use loaded
pairs and they were
designed to be 900 Ohms. And the phone should be a reasonable match to the
line to minimize refections which bother the users as echoes

** Huh ??

Audible echoes on a few miles of twisted pair ???

The speed of electrical signals must be a * hell of a lot * slower than C
where you live - pal.

The transformers in some sets was not an isolation transformer but a
hybrid and matching transformer. The carbon mic. used in the old phones
was powered from the line. And many
of the newer phones derive power from the line. So isolation can't be
used.

** At least you do know what an "isolation " transformer is.

Unlike some here.


...... Phil

 

[Michael A. Terrell]

"Floyd L. Davidson" wrote:

Eeyore <rabbitsfriendsandrelations@hotmail.com> wrote:
"Floyd L. Davidson" wrote:

Eeyore <rabbitsfriendsandrelations@hotmail.com> wrote:
Archimedes' Lever wrote:

Paul B <mail@nomail.invalid> wrote:

If I strip down some landline phones I 've got here, then will there
be a matching transformer in each one? Or is their technology
different now?

It isn't a matching transformer. It is for isolation purposes, and
yes, there is one in all phones that attach to Ma Bell.

Backward Americans as usual ! ;~)

An ignorant statement, to say the least.

As far as it being a matching transformer, the line
impedance varies typically from perhaps 100 Ohms all the
way up to perhaps 2000 Ohms... but you will not find
anything in a telset to adjust it to match. That's because
nobody cares if it is even close to matching the line
impedance.

So you agree it's NOT a matching transformer you TWAT ?

So now you finally agree too, eh? Who does that make
into a "TWAT"?

You won't find pointless transformers (dead weight) in WORLD telecoms.

An ignorant statement, to say the least.

Now, you are catching on. Eeyore is a british idiot, and Phil is a
mentally ill Aussie who won't take his medication.


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There are two kinds of people on this earth:
The crazy, and the insane.
The first sign of insanity is denying that you're crazy.

 

[Floyd L. Davidson]

"Phil Allison" <philallison@tpg.com.au> wrote:

"Floyd Lunatic Davidson"
Eeysore


Which is why I stated its primary purpose as being that of isolation

What exactly needs isolating from what ? Have you noticed they tend to be
made of plastic ?

The transformers are made of plastic???

** Don't be such a pompous bloody prick.

Of course he meant the phone itself.

That would be sort of stupid, eh? What the phone is
made of is not important in any way to this
conversation.

A telephone loop has both VF (voice frequency) and DC
signals going in both directions, all of which need to
be "isolated" from each other.

** Don't be such a pompous bloody prick !!

Don't much care for anyone who knows what they are
saying, eh?

Any "isolation " transformer has " galvanic isolation" .

Use Google to look up "isolation transformer".

Look it up on Google, if you are still completely clueless.

Wot a Wanker.

Er, Phil... calling people names that apply to you will
not make your comments any less wrong.

If you are only aware of one possible use for an
"isolation" transformer, perhaps you should be asking
for a tutorial rather than calling your elders nasty
names, eh?

--
Floyd L. Davidson <http://www.apaflo.com/floyd_davidson>
Ukpeagvik (Barrow, Alaska) floyd@apaflo.com

 

[Phil Allison]

"Floyd Lunatic Davidson"
Eeysore

Which is why I stated its primary purpose as being that of isolation

What exactly needs isolating from what ? Have you noticed they tend to
be
made of plastic ?

The transformers are made of plastic???

** Don't be such a pompous bloody prick.

Of course he meant the phone itself.

That would be sort of stupid, eh?

** YOU are the only STUPID thing here - pal.

What the phone is
made of is not important in any way to this
conversation.

** ASSHOLES like you do not get to decide what is relevant.

The fact that phones are made of plastic IS the damn reason that GALVANIC
isolation from the phone line is not required.

A telephone loop has both VF (voice frequency) and DC
signals going in both directions, all of which need to
be "isolated" from each other.

** Don't be such a pompous bloody prick !!

Don't much care for anyone who knows what they are
saying, eh?

** God almighty - you are one arrogant fucking cunthead.

Any "isolation " transformer has " galvanic isolation" .


Look it up on Google, if you are still completely clueless.

Wot a Wanker.


Er, Phil...

** Go get fucked

- you INSANE PRICK !!!

If you are only aware of one possible use for an
"isolation" transformer,

** Go get totally fucked

- you INSANE AUTISTIC PRICK !!!



....... Phil

 

[Salmon Egg]

In article <873ag6o4ob.fld@apaflo.com>,
floyd@apaflo.com (Floyd L. Davidson) wrote:

A telephone loop has both VF (voice frequency) and DC
signals going in both directions, all of which need to
be "isolated" from each other. The transmit and receive
VF signals also have to be isolated from each other
(which is why the transformer is commonly called a
"Hybrid Network").

For a long time I believe the term actually used for this transformer
was "induction coil."

Bill

--
Private Profit; Public Poop! Avoid collateral windfall!

 

[Salmon Egg]

In article <6rtcicF38bo8U1@mid.individual.net>,
"Phil Allison" <philallison@tpg.com.au> wrote:

** Go get fucked

- you INSANE PRICK !!!



If you are only aware of one possible use for an
"isolation" transformer,


** Go get totally fucked

- you INSANE AUTISTIC PRICK !!!



...... Phil

Phil, have you passed the age of adolescence?

Bill

--
Private Profit; Public Poop! Avoid collateral windfall!

 

[Phil Allison]

"Salmon Egg"


** Piss off - you fuckwitted BAD EGG !!

And take all your STINKING AUTISTIC PRICK scumbags with you.



... ... Phil

 

[Lostgallifreyan]

"Phil Allison" <philallison@tpg.com.au> wrote in
news:6rtbepF39k9vU1@mid.individual.net:

...And the phone should be a reasonable match to
the line to minimize refections which bother the users as echoes


** Huh ??

Audible echoes on a few miles of twisted pair ???

The speed of electrical signals must be a * hell of a lot * slower than
C where you live - pal.

http://www.physicsforums.com/archive/index.php/t-79645.html

 

[Phil Allison]

"Lostgallifreyan"


** FUCK OFF -

YOU RIDICULOUS DICKWAD !!

 

[krw]

In article <3MKdnV-fQ4mr58TUnZ2dnUVZ_rXinZ2d@earthlink.com>,
mike.terrell@earthlink.net says...

"Floyd L. Davidson" wrote:

Eeyore <rabbitsfriendsandrelations@hotmail.com> wrote:
"Floyd L. Davidson" wrote:

Eeyore <rabbitsfriendsandrelations@hotmail.com> wrote:
Archimedes' Lever wrote:

Paul B <mail@nomail.invalid> wrote:

If I strip down some landline phones I 've got here, then will there
be a matching transformer in each one? Or is their technology
different now?

It isn't a matching transformer. It is for isolation purposes, and
yes, there is one in all phones that attach to Ma Bell.

Backward Americans as usual ! ;~)

An ignorant statement, to say the least.

As far as it being a matching transformer, the line
impedance varies typically from perhaps 100 Ohms all the
way up to perhaps 2000 Ohms... but you will not find
anything in a telset to adjust it to match. That's because
nobody cares if it is even close to matching the line
impedance.

So you agree it's NOT a matching transformer you TWAT ?

So now you finally agree too, eh? Who does that make
into a "TWAT"?

You won't find pointless transformers (dead weight) in WORLD telecoms.

An ignorant statement, to say the least.


Now, you are catching on. Eeyore is a british idiot, and Phil is a
mentally ill Aussie who won't take his medication.

Not much of a difference, eh?

--
Keith

 

[Lostgallifreyan]

"Phil Allison" <philallison@tpg.com.au> wrote in
news:6rtkkdF3971tU1@mid.individual.net:

"Lostgallifreyan"


** FUCK OFF -

YOU RIDICULOUS DICKWAD !!

Wasn't aimed at you. I was thinking earlier that it had a higher signal to
noise ratio than you though. True, no? You're all noise now.

 

[Phil Allison]

"Lostgallifreyan"


** FUCK OFF -

YOU RIDICULOUS LYING DICKWAD !!

 

[Lostgallifreyan]

"Phil Allison" <philallison@tpg.com.au> wrote in
news:6rtm4eF3aa2tU1@mid.individual.net:

LYING

Posted after last post in a subthread does not mean aimed at last poser, when
the new post is a useful read for all posting. Got that? Read it, it's a lot
more interesting than you are right now.

 

[Phil Allison]

"Lostgallifreyan"

"Phil Allison"
LYING

Posted after last post in a subthread does not mean aimed at last poser,
when
the new post is a useful read for all posting. Got that? Read it, it's a
lot
more interesting than you are right now.

** Oxygen thieves like this anencephalic turd need shooting.




.... Phil

 

[Lostgallifreyan]

"Phil Allison" <philallison@tpg.com.au> wrote in
news:6rtms1F3bk1eU1@mid.individual.net:

"Lostgallifreyan"

"Phil Allison"
LYING

Posted after last post in a subthread does not mean aimed at last poser,
when
the new post is a useful read for all posting. Got that? Read it, it's a
lot
more interesting than you are right now.


** Oxygen thieves like this anencephalic turd need shooting.




... Phil

Caps to wit ratio improved, but nope, still noisy..

 

[Floyd L. Davidson]

"Phil Allison" <philallison@tpg.com.au> wrote:

The term " isolation transformer " has a specific meaning in electronics and
electrical work = "galvanic isolation".

That is not true. You need to use Google and learn something.

--
Floyd L. Davidson <http://www.apaflo.com/floyd_davidson>
Ukpeagvik (Barrow, Alaska) floyd@apaflo.com

 

[Floyd L. Davidson]

"Phil Allison" <philallison@tpg.com.au> wrote:

The fact that phones are made of plastic IS the damn reason that GALVANIC
isolation from the phone line is not required.

That is one of the best bits of humor I've seen in some time on
this group. Nice post. I was rolling on the floor laughing.

--
Floyd L. Davidson <http://www.apaflo.com/floyd_davidson>
Ukpeagvik (Barrow, Alaska) floyd@apaflo.com

 

[Phil Allison]

"Floyd LUNATIC AUTISTIC Davidson"

"Phil Allison"

The term " isolation transformer " has a specific meaning in electronics
and
electrical work = "galvanic isolation".

That is not true.

** Fraid it damn well is - FUCKHEAD.

You need to use Google and learn something.

** You are nothing but a FUCKING LIAR !!

http://en.wikipedia.org/wiki/Isolation_transformer

http://www.leonaudio.com.au/line_iso.htm


Fuck off - you goddamn, code scribbling FREAKOID !!!




...... Phil

 

[Phil Allison]

Floyd Lunatic ASSHOLE Davidson"

The transformers are made of plastic???

** Don't be such a pompous bloody prick.

Of course he meant the phone itself.

That would be sort of stupid, eh?

** YOU are the only STUPID thing here - pal.

What the phone is made of is not important in any way to this
conversation.

** ASSHOLES like you do not get to decide what is relevant.

The fact that phones are made of plastic IS the damn reason that GALVANIC
isolation from the phone line is not required.

A telephone loop has both VF (voice frequency) and DC
signals going in both directions, all of which need to
be "isolated" from each other.

** Don't be such a pompous bloody prick !!

Don't much care for anyone who knows what they are
saying, eh?

** God almighty -

you are one arrogant fucking NUT CASE cunthead !!

Any "isolation " transformer has " galvanic isolation" .

Look it up on Google, if you are still completely clueless.

Wot a Wanker.

** Go get totally fucked

- you INSANE AUTISTIC PRICK !!!



....... Phil

 

[Floyd L. Davidson]

Salmon Egg <SalmonEgg@sbcglobal.net> wrote:

In article <873ag6o4ob.fld@apaflo.com>,
floyd@apaflo.com (Floyd L. Davidson) wrote:

A telephone loop has both VF (voice frequency) and DC
signals going in both directions, all of which need to
be "isolated" from each other. The transmit and receive
VF signals also have to be isolated from each other
(which is why the transformer is commonly called a
"Hybrid Network").

For a long time I believe the term actually used for this transformer
was "induction coil."

They are commonly called either "induction coil" or
"repeat coil". However, the ones used in the type of
telephone you would commonly see (in a home or business)
are generally encapsulated, and include a balance
network, midpoint capacitor, and possibly other
components, and is usually but not always called a
"network" of some kind.

Equipment seen in a telephone office would more likely
have been built with individual components, and at least
up into the 1970's would have had a separate transformer
that would indeed have been labeled as "Ind. Coil" or
"Rep. Coil". At least for WECo built equipment that
would have been true, and others at times did the same
or came up with something different just to be
different.

--
Floyd L. Davidson <http://www.apaflo.com/floyd_davidson>
Ukpeagvik (Barrow, Alaska) floyd@apaflo.com