Talema toroidal transformer

E

eatmorepies

Guest
I have a toroidal transformer.

It is marked: Talema TVR 2518 7702-P2S2
486

I have failed to find a data sheet using Google - anyone any ideas where I
might find a data sheet? There's 8 wires: blue, brown. pink, pink, red,
yellow, green and purple.

John
 
"eatmorepies" <jckipper@lineone.net> wrote in message
news:aq1qu6FbabsU1@mid.individual.net...
I have a toroidal transformer.

It is marked: Talema TVR 2518 7702-P2S2
486

I have failed to find a data sheet using Google - anyone any ideas where I
might find a data sheet? There's 8 wires: blue, brown. pink, pink, red,
yellow, green and purple.

John
Try here: http://www.nuvotem.com/en/index.shtml
Click to expand...
 
"eatmorepies"
I have a toroidal transformer.
Click to expand...

** Where did it come from ?

Is it new or used and removed from equipment ?

If the latter, then it is a custom wound job and there will be no published
data.

One can analyse a transformer and come up with voltage and currents ratings
for each winding - but it aint that simple.


.... Phil
 
"eatmorepies"
I have a toroidal transformer.

It is marked: Talema TVR 2518 7702-P2S2
486

I have failed to find a data sheet using Google - anyone any ideas where I
might find a data sheet? There's 8 wires: blue, brown. pink, pink, red,
yellow, green and purple.
Click to expand...
** Any chance this was from a valve (ie tube ) amplifier?

The blue/brown pair are bound to be the primary.

Measure all the resistances and get back to us.



.... Phil
 
"eatmorepies" <jckipper@lineone.net> wrote in message
news:aq1qu6FbabsU1@mid.individual.net...
I have a toroidal transformer.

It is marked: Talema TVR 2518 7702-P2S2
486

I have failed to find a data sheet using Google - anyone any ideas where I
might find a data sheet? There's 8 wires: blue, brown. pink, pink, red,
yellow, green and purple.

John
Click to expand...
Assuming its a mains transformer - connect the highest resistance winding to
the mains and see what voltages the other windings give.

If you're not sure its a mains transformer - a variac might come in handy.
 
"Ian Field" <gangprobing.alien@ntlworld.com> wrote in message
news:DL7%s.33333$KK6.26722@fx17.fr7...
"eatmorepies" <jckipper@lineone.net> wrote in message
news:aq1qu6FbabsU1@mid.individual.net...
I have a toroidal transformer.

It is marked: Talema TVR 2518 7702-P2S2
486

I have failed to find a data sheet using Google - anyone any ideas where
I might find a data sheet? There's 8 wires: blue, brown. pink, pink, red,
yellow, green and purple.

John

Assuming its a mains transformer - connect the highest resistance winding
to the mains and see what voltages the other windings give.

If you're not sure its a mains transformer - a variac might come in handy.
Click to expand...
Thanks for the various suggestions.

I've done some tests. It appears the blue and brown are not the mains input
leads, they are open circuit. Input coil of 40R and outputs of 3R8, 0.9R and
1R1. The output of the 3R8 coil is 22V.

It's a gash transformer I took out of something some years ago. A friend has
a use for a power supply and I wondered if this transformer would make the
basis of a simple PSU. He has now bought a 0-30V, 0-5A, fully adjustable and
regulated bench supply for Ł60 (inc P&P!). It's not worth me bothering to
make something.

John
 
On Sun, 10 Mar 2013 22:25:36 -0000, "Ian Field"
<gangprobing.alien@ntlworld.com> wrote:

"eatmorepies" <jckipper@lineone.net> wrote in message
news:aq1qu6FbabsU1@mid.individual.net...
I have a toroidal transformer.

It is marked: Talema TVR 2518 7702-P2S2
486

I have failed to find a data sheet using Google - anyone any ideas where I
might find a data sheet? There's 8 wires: blue, brown. pink, pink, red,
yellow, green and purple.

John

Assuming its a mains transformer - connect the highest resistance winding to
the mains and see what voltages the other windings give.
Click to expand...
---
An assumption which may make the transformer give up its magic smoke.
---

If you're not sure its a mains transformer - a variac might come in handy.
Click to expand...
---
Or the very much less expensive incandescent lamp trick you claim to
be intimately familiar with?

--
JF
 
On Sun, 10 Mar 2013 22:39:57 -0000, "eatmorepies"
<jckipper@lineone.net> wrote:

"Ian Field" <gangprobing.alien@ntlworld.com> wrote in message
news:DL7%s.33333$KK6.26722@fx17.fr7...


"eatmorepies" <jckipper@lineone.net> wrote in message
news:aq1qu6FbabsU1@mid.individual.net...
I have a toroidal transformer.

It is marked: Talema TVR 2518 7702-P2S2
486

I have failed to find a data sheet using Google - anyone any ideas where
I might find a data sheet? There's 8 wires: blue, brown. pink, pink, red,
yellow, green and purple.

John

Assuming its a mains transformer - connect the highest resistance winding
to the mains and see what voltages the other windings give.

If you're not sure its a mains transformer - a variac might come in handy.

Thanks for the various suggestions.

I've done some tests. It appears the blue and brown are not the mains input
leads, they are open circuit. Input coil of 40R and outputs of 3R8, 0.9R and
1R1. The output of the 3R8 coil is 22V.

It's a gash transformer I took out of something some years ago. A friend has
a use for a power supply and I wondered if this transformer would make the
basis of a simple PSU. He has now bought a 0-30V, 0-5A, fully adjustable and
regulated bench supply for Ł60 (inc P&P!). It's not worth me bothering to
make something.

John
Click to expand...
---
What's a "gash" transformer?

Please don't quit now, since characterizing a random transformer is a
really interesting process.

--
JF
 
John Fields explained on 11/03/2013 :
On Sun, 10 Mar 2013 22:39:57 -0000, "eatmorepies"
jckipper@lineone.net> wrote:


"Ian Field" <gangprobing.alien@ntlworld.com> wrote in message
news:DL7%s.33333$KK6.26722@fx17.fr7...


"eatmorepies" <jckipper@lineone.net> wrote in message
news:aq1qu6FbabsU1@mid.individual.net...
I have a toroidal transformer.

It is marked: Talema TVR 2518 7702-P2S2
486

I have failed to find a data sheet using Google - anyone any ideas where
I might find a data sheet? There's 8 wires: blue, brown. pink, pink, red,
yellow, green and purple.

John

Assuming its a mains transformer - connect the highest resistance winding
to the mains and see what voltages the other windings give.

If you're not sure its a mains transformer - a variac might come in handy.

Thanks for the various suggestions.

I've done some tests. It appears the blue and brown are not the mains input
leads, they are open circuit. Input coil of 40R and outputs of 3R8, 0.9R and
1R1. The output of the 3R8 coil is 22V.

It's a gash transformer I took out of something some years ago. A friend has
a use for a power supply and I wondered if this transformer would make the
basis of a simple PSU. He has now bought a 0-30V, 0-5A, fully adjustable and
regulated bench supply for ÂŁ60 (inc P&P!). It's not worth me bothering to
make something.

John

---
What's a "gash" transformer?
Click to expand...

ENGLISH Slang surplus to requirements; unnecessary, extra, or spare
[of unknown origin]

Collins English Dictionary – Complete and Unabridged © HarperCollins
Publishers 1991, 1994, 1998, 2000, 2003
Please don't quit now, since characterizing a random transformer is a
really interesting process.
Click to expand...
--
John G
 
"eatmorepies"

I've done some tests. It appears the blue and brown are not the mains
input leads, they are open circuit. Input coil of 40R and outputs of 3R8,
0.9R and 1R1. The output of the 3R8 coil is 22V.
Click to expand...
** So it is a mains tranny for 230/240V power and the primary is the NOT
blue and brown pair ??

BTW:

A 40 ohms primary corresponds to an 80VA rating.


..... Phil
 
"John Fields" <jfields@austininstruments.com> wrote in message
news:nr3qj8li1bm22el565v3a5hbojo13ue15v@4ax.com...
On Sun, 10 Mar 2013 22:25:36 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:



"eatmorepies" <jckipper@lineone.net> wrote in message
news:aq1qu6FbabsU1@mid.individual.net...
I have a toroidal transformer.

It is marked: Talema TVR 2518 7702-P2S2
486

I have failed to find a data sheet using Google - anyone any ideas where
I
might find a data sheet? There's 8 wires: blue, brown. pink, pink, red,
yellow, green and purple.

John

Assuming its a mains transformer - connect the highest resistance winding
to
the mains and see what voltages the other windings give.

---
An assumption which may make the transformer give up its magic smoke.
---

If you're not sure its a mains transformer - a variac might come in handy.

---
Or the very much less expensive incandescent lamp trick you claim to
be intimately familiar with?
Click to expand...
I never made any such claim - and in your drug addled haze, you're confusing
a bodge for battery charging with an excessive charger.
 
On Mon, 11 Mar 2013 17:11:05 -0000, "Ian Field"
<gangprobing.alien@ntlworld.com> wrote:

"John Fields" <jfields@austininstruments.com> wrote in message
news:nr3qj8li1bm22el565v3a5hbojo13ue15v@4ax.com...
On Sun, 10 Mar 2013 22:25:36 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:



"eatmorepies" <jckipper@lineone.net> wrote in message
news:aq1qu6FbabsU1@mid.individual.net...
I have a toroidal transformer.

It is marked: Talema TVR 2518 7702-P2S2
486

I have failed to find a data sheet using Google - anyone any ideas where
I
might find a data sheet? There's 8 wires: blue, brown. pink, pink, red,
yellow, green and purple.

John

Assuming its a mains transformer - connect the highest resistance winding
to
the mains and see what voltages the other windings give.

---
An assumption which may make the transformer give up its magic smoke.
---

If you're not sure its a mains transformer - a variac might come in handy.

---
Or the very much less expensive incandescent lamp trick you claim to
be intimately familiar with?

I never made any such claim - and in your drug addled haze,
Click to expand...
---
Oh, my, little miss Goodie Two Shoes is casting aspersions about
something which she admits she has no knowledge of, as usual!
---

you're confusing
a bodge for battery charging with an excessive charger.
Click to expand...
---
Not at all, I was merely pointing out that you _did_ make a claim to
knowing that an incandescent lamp can be used as a current limiter,
and as such could be used to limit the current into a transformer
winding for test purposes, instead of employing a much more expensive
VARIAC which the OP was unlikely to have on hand.


--
JF
 
"John Fields" <jfields@austininstruments.com> wrote in message
news:e4fsj8p81bc5ncu364vs88a4kjucufnl7n@4ax.com...
On Mon, 11 Mar 2013 17:11:05 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:



"John Fields" <jfields@austininstruments.com> wrote in message
news:nr3qj8li1bm22el565v3a5hbojo13ue15v@4ax.com...
On Sun, 10 Mar 2013 22:25:36 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:



"eatmorepies" <jckipper@lineone.net> wrote in message
news:aq1qu6FbabsU1@mid.individual.net...
I have a toroidal transformer.

It is marked: Talema TVR 2518
7702-P2S2
486

I have failed to find a data sheet using Google - anyone any ideas
where
I
might find a data sheet? There's 8 wires: blue, brown. pink, pink,
red,
yellow, green and purple.

John

Assuming its a mains transformer - connect the highest resistance
winding
to
the mains and see what voltages the other windings give.

---
An assumption which may make the transformer give up its magic smoke.
---

If you're not sure its a mains transformer - a variac might come in
handy.

---
Or the very much less expensive incandescent lamp trick you claim to
be intimately familiar with?

I never made any such claim - and in your drug addled haze,

---
Oh, my, little miss Goodie Two Shoes is casting aspersions about
something which she admits she has no knowledge of, as usual!
Click to expand...
You admitted being a druggie - I'm merely quoting you.
 
On Mon, 11 Mar 2013 20:34:59 -0000, "Ian Field"
<gangprobing.alien@ntlworld.com> wrote:

"John Fields" <jfields@austininstruments.com> wrote in message
news:e4fsj8p81bc5ncu364vs88a4kjucufnl7n@4ax.com...

---
Oh, my, little miss Goodie Two Shoes is casting aspersions about
something which she admits she has no knowledge of, as usual!

You admitted being a druggie - I'm merely quoting you.
Click to expand...
---
Nope, you're trying to cast a derogatory light by deliberately
misquoting.

--
JF
 
"John Fields" <jfields@austininstruments.com> wrote in message
news:uggsj85bf7dbgn2sqerq8c2q1se51hdh1d@4ax.com...
On Mon, 11 Mar 2013 20:34:59 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:



"John Fields" <jfields@austininstruments.com> wrote in message
news:e4fsj8p81bc5ncu364vs88a4kjucufnl7n@4ax.com...

---
Oh, my, little miss Goodie Two Shoes is casting aspersions about
something which she admits she has no knowledge of, as usual!

You admitted being a druggie - I'm merely quoting you.

---
Nope, you're trying to cast a derogatory light by deliberately
misquoting.
Click to expand...

Eh! - you taunted me for not being able to handle taking drugs like being a
dead head was something to be proud of.
 
On Mon, 11 Mar 2013 15:31:33 -0500, John Fields
<jfields@austininstruments.com> wrote:

On Mon, 11 Mar 2013 17:11:05 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:



"John Fields" <jfields@austininstruments.com> wrote in message
news:nr3qj8li1bm22el565v3a5hbojo13ue15v@4ax.com...
On Sun, 10 Mar 2013 22:25:36 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:



"eatmorepies" <jckipper@lineone.net> wrote in message
news:aq1qu6FbabsU1@mid.individual.net...
I have a toroidal transformer.

It is marked: Talema TVR 2518 7702-P2S2
486

I have failed to find a data sheet using Google - anyone any ideas where
I
might find a data sheet? There's 8 wires: blue, brown. pink, pink, red,
yellow, green and purple.

John

Assuming its a mains transformer - connect the highest resistance winding
to
the mains and see what voltages the other windings give.

---
An assumption which may make the transformer give up its magic smoke.
---

If you're not sure its a mains transformer - a variac might come in handy.

---
Or the very much less expensive incandescent lamp trick you claim to
be intimately familiar with?

I never made any such claim - and in your drug addled haze,

---
Oh, my, little miss Goodie Two Shoes is casting aspersions about
something which she admits she has no knowledge of, as usual!
---

you're confusing
a bodge for battery charging with an excessive charger.

---
Not at all, I was merely pointing out that you _did_ make a claim to
knowing that an incandescent lamp can be used as a current limiter,
and as such could be used to limit the current into a transformer
winding for test purposes, instead of employing a much more expensive
VARIAC which the OP was unlikely to have on hand.
Click to expand...
In my economic pinching youth I used to keep my car battery
trickle-charged with a 100W light bulb and a diode, using a polarized
plug to ensure a car body at ground potential ;-)

Then, at Motorola, I'd run the car down the parking lot aisle, jump in
and pop the clutch to start it.

Then I would buy a battery on sale at Sears the next week >:-}

...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.
 
On Mon, 11 Mar 2013 22:08:50 -0000, "Ian Field"
<gangprobing.alien@ntlworld.com> wrote:

"John Fields" <jfields@austininstruments.com> wrote in message
news:uggsj85bf7dbgn2sqerq8c2q1se51hdh1d@4ax.com...
On Mon, 11 Mar 2013 20:34:59 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:



"John Fields" <jfields@austininstruments.com> wrote in message
news:e4fsj8p81bc5ncu364vs88a4kjucufnl7n@4ax.com...

---
Oh, my, little miss Goodie Two Shoes is casting aspersions about
something which she admits she has no knowledge of, as usual!

You admitted being a druggie - I'm merely quoting you.

---
Nope, you're trying to cast a derogatory light by deliberately
misquoting.


Eh! - you taunted me for not being able to handle taking drugs like being a
dead head was something to be proud of.
Click to expand...
---
Nope, I taunted you for not being able to handle taking drugs like
being a dead head was something you should not be proud of.

Especially since you admit you have no referential experience and yet
proffer judgments askance of your expertise.

--
JF
 
"John Fields" <jfields@austininstruments.com> wrote in message
news:dc7tj8ttp02321bgf704411mq6al1uij6f@4ax.com...
On Mon, 11 Mar 2013 22:08:50 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:



"John Fields" <jfields@austininstruments.com> wrote in message
news:uggsj85bf7dbgn2sqerq8c2q1se51hdh1d@4ax.com...
On Mon, 11 Mar 2013 20:34:59 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:



"John Fields" <jfields@austininstruments.com> wrote in message
news:e4fsj8p81bc5ncu364vs88a4kjucufnl7n@4ax.com...

---
Oh, my, little miss Goodie Two Shoes is casting aspersions about
something which she admits she has no knowledge of, as usual!

You admitted being a druggie - I'm merely quoting you.

---
Nope, you're trying to cast a derogatory light by deliberately
misquoting.


Eh! - you taunted me for not being able to handle taking drugs like being
a
dead head was something to be proud of.

---
Nope, I taunted you for not being able to handle taking drugs like
being a dead head was something you should not be proud of.

Especially since you admit you have no referential experience and yet
proffer judgments askance of your expertise.
Click to expand...

Whatever I did or didn't do doesn't alter the fact that you're a washed up
boring old druggie.
 
On Tue, 12 Mar 2013 16:25:59 -0000, "Ian Field"
<gangprobing.alien@ntlworld.com> wrote:

"John Fields" <jfields@austininstruments.com> wrote in message
news:dc7tj8ttp02321bgf704411mq6al1uij6f@4ax.com...
On Mon, 11 Mar 2013 22:08:50 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:



"John Fields" <jfields@austininstruments.com> wrote in message
news:uggsj85bf7dbgn2sqerq8c2q1se51hdh1d@4ax.com...
On Mon, 11 Mar 2013 20:34:59 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:



"John Fields" <jfields@austininstruments.com> wrote in message
news:e4fsj8p81bc5ncu364vs88a4kjucufnl7n@4ax.com...

---
Oh, my, little miss Goodie Two Shoes is casting aspersions about
something which she admits she has no knowledge of, as usual!

You admitted being a druggie - I'm merely quoting you.

---
Nope, you're trying to cast a derogatory light by deliberately
misquoting.


Eh! - you taunted me for not being able to handle taking drugs like being
a
dead head was something to be proud of.

---
Nope, I taunted you for not being able to handle taking drugs like
being a dead head was something you should not be proud of.

Especially since you admit you have no referential experience and yet
proffer judgments askance of your expertise.


Whatever I did or didn't do doesn't alter the fact that you're a washed up
boring old druggie.
Click to expand...
---
And yet you seem to hang on my every word and spew ad hominem vitriol
because you haven't the wherewithal to respond with carefully reasoned
discourse supporting a "point of view" based on ignorance and fear.

What a curious, cowardly, little creature you are!

You're afraid to open the buckles of your blinders and afraid to
acknowledge that fear, yet you condemn those who have faced the same
fear and dared to do what you cannot.


--
JF
 
On Tue, 12 Mar 2013 18:12:12 -0500, John Fields
<jfields@austininstruments.com> wrote:

On Tue, 12 Mar 2013 16:25:59 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:



"John Fields" <jfields@austininstruments.com> wrote in message
news:dc7tj8ttp02321bgf704411mq6al1uij6f@4ax.com...
On Mon, 11 Mar 2013 22:08:50 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:



"John Fields" <jfields@austininstruments.com> wrote in message
news:uggsj85bf7dbgn2sqerq8c2q1se51hdh1d@4ax.com...
On Mon, 11 Mar 2013 20:34:59 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:



"John Fields" <jfields@austininstruments.com> wrote in message
news:e4fsj8p81bc5ncu364vs88a4kjucufnl7n@4ax.com...

---
Oh, my, little miss Goodie Two Shoes is casting aspersions about
something which she admits she has no knowledge of, as usual!

You admitted being a druggie - I'm merely quoting you.

---
Nope, you're trying to cast a derogatory light by deliberately
misquoting.


Eh! - you taunted me for not being able to handle taking drugs like being
a
dead head was something to be proud of.

---
Nope, I taunted you for not being able to handle taking drugs like
being a dead head was something you should not be proud of.

Especially since you admit you have no referential experience and yet
proffer judgments askance of your expertise.


Whatever I did or didn't do doesn't alter the fact that you're a washed up
boring old druggie.

---
And yet you seem to hang on my every word and spew ad hominem vitriol
because you haven't the wherewithal to respond with carefully reasoned
discourse supporting a "point of view" based on ignorance and fear.

What a curious, cowardly, little creature you are!

You're afraid to open the buckles of your blinders and afraid to
acknowledge that fear, yet you condemn those who have faced the same
fear and dared to do what you cannot.
Click to expand...
Ian's incapability and insufficiency reminds of one who's fond of
falling back on "cluck-cluck" when cornered.

...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.
 
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