Talema toroidal transformer

[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.

John

[ED]

"eatmorepies" <jcki...@lineone.net> wrote in message
news:aq1qu6...@mid.individual.net...

Try here: http://www.nuvotem.com/en/index.shtml

[Phil Allison]

"eatmorepies"

>
>I have a toroidal transformer.

** 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

[Phil Allison]

"eatmorepies"

** 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

[Ian Field]

"eatmorepies" <jcki...@lineone.net> wrote in message
news:aq1qu6...@mid.individual.net...

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.

[eatmorepies]

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

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 £60 (inc P&P!). It's not worth me bothering to
make something.

John

[John Fields]

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

>
>
>"eatmorepies" <jcki...@lineone.net> wrote in message
>news:aq1qu6...@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?

--
JF

[John Fields]

---
What's a "gash" transformer?

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

--
JF

[John G]

John Fields explained on 11/03/2013 :

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.

--

John G

[Phil Allison]

"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.

** 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

[Ian Field]

"John Fields" <jfi...@austininstruments.com> wrote in message
news:nr3qj8li1bm22el56...@4ax.com...

I never made any such claim - and in your drug addled haze, you're confusing
a bodge for battery charging with an excessive charger.

[John Fields]

On Mon, 11 Mar 2013 17:11:05 -0000, "Ian Field"

---
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.


--
JF

[Ian Field]

"John Fields" <jfi...@austininstruments.com> wrote in message

news:e4fsj8p81bc5ncu36...@4ax.com...

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

[John Fields]

On Mon, 11 Mar 2013 20:34:59 -0000, "Ian Field"

<gangprob...@ntlworld.com> wrote:

>
>
>"John Fields" <jfi...@austininstruments.com> wrote in message

>news:e4fsj8p81bc5ncu36...@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.

--
JF

[Ian Field]

"John Fields" <jfi...@austininstruments.com> wrote in message

news:uggsj85bf7dbgn2sq...@4ax.com...

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

[Jim Thompson]

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.

[John Fields]

On Mon, 11 Mar 2013 22:08:50 -0000, "Ian Field"

<gangprob...@ntlworld.com> wrote:

>
>
>"John Fields" <jfi...@austininstruments.com> wrote in message
>news:uggsj85bf7dbgn2sq...@4ax.com...
>> On Mon, 11 Mar 2013 20:34:59 -0000, "Ian Field"
>> <gangprob...@ntlworld.com> wrote:
>>
>>>
>>>
>>>"John Fields" <jfi...@austininstruments.com> wrote in message
>>>news:e4fsj8p81bc5ncu36...@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.

--
JF

[Ian Field]

"John Fields" <jfi...@austininstruments.com> wrote in message

news:dc7tj8ttp02321bgf...@4ax.com...

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

[John Fields]

On Tue, 12 Mar 2013 16:25:59 -0000, "Ian Field"

---
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

[Jim Thompson]

Ian's incapability and insufficiency reminds of one who's fond of
falling back on "cluck-cluck" when cornered.

[John Fields]

On Tue, 12 Mar 2013 16:28:36 -0700, Jim Thompson
<To-Email-Use-Th...@On-My-Web-Site.com> wrote:


>Ian's incapability and insufficiency reminds of one who's fond of
>falling back on "cluck-cluck" when cornered.
>
> ...Jim Thompson

---
;)

--
JF

[Ian Field]

"John Fields" <jfi...@austininstruments.com> wrote in message

news:m8bvj81nuavlo7hav...@4ax.com...

You started the flame war, and haven't said anything sensible yet.

And I can't remember the last time either you or your bum chum JT posted
anything on topic!

[John Fields]

On Wed, 13 Mar 2013 16:31:08 -0000, "Ian Field"

---
All I did was, without coddling you, criticize your first post in this
thread, which miffed you to the point where you felt that hostile
retaliation was required.
---

>and haven't said anything sensible yet.

---
Your inability to differentiate between sense and nonsense doesn't
make sense nonsense.
---

>And I can't remember the last time either you or your bum chum JT posted
>anything on topic!

---
Wow!!!
Ad hominem attacks _and_ guilt by association instead of addressing
the argument, is it?

Joseph Goebbels would have found you to be an apt student.

I can't speak for Jim, of course, but since my suggestion to use an
incandescent lamp as a current limiter in order to remove the danger
of letting the magic smoke out of the transformer - during test - was
on topic, part of this very thread, and only three days old, it
appears you may be having a problem with short-term memory loss.

Or, more likely, self-induced temporary blindness.

--
JF

[Ian Field]

"John Fields" <jfi...@austininstruments.com> wrote in message

news:2uk1k8dcg2lu558et...@4ax.com...

Not retaliation - merely providing you with the platform to demonstrate to
all; what a nasty spiteful little twat you are.

[John Fields]

On Wed, 13 Mar 2013 19:53:41 -0000, "Ian Field"

---
Wow, quick response, but the semicolon is wrong.

And a "nasty spiteful little twat?"

Anathema to you?

I guess you just sit around waiting for the phone to ring...

--
JF

[Jim Thompson]

But Ian is in the majority... "dumb as an ashtray" >:-}

[John Fields]

On Wed, 13 Mar 2013 14:13:20 -0700, Jim Thompson
<To-Email-Use-Th...@On-My-Web-Site.com> wrote:


>But Ian is in the majority... "dumb as an ashtray" >:-}
>
> ...Jim Thompson

---
I'm trying to prove a point, singlehandedly, so I'd appreciate your
not horning in until it's done.

Thanks,

--
JF

[Ian Field]

"John Fields" <jfi...@austininstruments.com> wrote in message

news:tfr1k8t71c3ddic6r...@4ax.com...

But JT is your bum chum - you've got to share.

[John Fields]

---
As usual, your bent isn't everyone's and is often criticized as being
immoral.

Unable to objectively justify your errant behavior as being normal,
you take the criticism to heart and subconsciously buy into the guilt
since you recognize that smarter people than you have proclaimed
homosexuality as an example of aberrant behavior.

With your own guilt in hand, having been convinced that homosexual
behavior is wrong, it's just a short step until heterophobia starts
you bashing everyone as fags.

--
JF

[John Fields]

On Thu, 14 Mar 2013 12:57:24 -0700, Fred Abse
<excret...@invalid.invalid> wrote:

>On Sun, 10 Mar 2013 18:48:12 -0500, John Fields wrote:
>
>> What's a "gash" transformer?
>

>British Royal Navy slang meaning rubbish.

---
"Gash", with vulgar reference - which we still use - to the vulva,
might have meant silliness, back then.

--
JF

[Ian Field]

"Fred Abse" <excret...@invalid.invalid> wrote in message
news:pan.2013.03.11....@invalid.invalid...

> On Sun, 10 Mar 2013 18:48:12 -0500, John Fields wrote:
>

>> What's a "gash" transformer?
>

> British Royal Navy slang meaning rubbish.
>

> I had to ask the same question, years ago.

Must've been a lot of years ago - its been in common usage as long as I can
remember.

[Ian Field]

"John Fields" <jfi...@austininstruments.com> wrote in message

news:hja4k8djunhlo5ghq...@4ax.com...

WGAF - the important point is, you're very boring.

[John Fields]

---
But you've already demonstrated that you have an extremely short
attention span, so if the first time you ever heard it was a day or
two ago, in this thread, you'd probably think it was years ago if you
remembered it at all.

--
JF

[Ian Field]

"John Fields" <jfi...@austininstruments.com> wrote in message

news:0t47k85fuppnl608g...@4ax.com...

> On Thu, 14 Mar 2013 21:02:58 -0000, "Ian Field"
> <gangprob...@ntlworld.com> wrote:
>
>>
>>
>>"Fred Abse" <excret...@invalid.invalid> wrote in message
>>news:pan.2013.03.11....@invalid.invalid...
>>> On Sun, 10 Mar 2013 18:48:12 -0500, John Fields wrote:
>>>
>>>> What's a "gash" transformer?
>>>
>>> British Royal Navy slang meaning rubbish.
>>>
>>> I had to ask the same question, years ago.
>>
>>Must've been a lot of years ago - its been in common usage as long as I
>>can
>>remember.
>
> ---
> But you've already demonstrated that you have an extremely short
> attention span,

Nothing of the sort - you're extremely boring.

so if the first time you ever heard it was a day or
> two ago, in this thread, you'd probably think it was years ago if you
> remembered it at all.

What impaired your reading comprehension skills so severely?!

If you were dropped on your head when you were little, you should've grown
out of it by now!

[John Fields]

On Thu, 14 Mar 2013 21:04:47 -0000, "Ian Field"

---
_You_ do, obviously, since you take time out of your otherwise tawdry
life to comment on what you admittedly don't know anything about.
---

>- the important point is, you're very boring.

---
Poppycock and, I think, more poppy than cock.

But now we have a dichotomy. How interesting!

On the one hand you claim that I'm very boring, while on the other
- instead of ignoring my "very boring" posts, which any genuinely
disinterested party would - you seem to be champing at the bit,
praying for me to post anything which will allow you to prey on my
replies and be noticed.

But why would you want to do that?

Precisely because there's very little about you which is noteworthy or
outstanding.


--
JF

[John Fields]

On Fri, 15 Mar 2013 22:11:24 -0000, "Ian Field"

<gangprob...@ntlworld.com> wrote:

>
>
>"John Fields" <jfi...@austininstruments.com> wrote in message
>news:0t47k85fuppnl608g...@4ax.com...
>> On Thu, 14 Mar 2013 21:02:58 -0000, "Ian Field"
>> <gangprob...@ntlworld.com> wrote:
>>
>>>
>>>
>>>"Fred Abse" <excret...@invalid.invalid> wrote in message
>>>news:pan.2013.03.11....@invalid.invalid...
>>>> On Sun, 10 Mar 2013 18:48:12 -0500, John Fields wrote:
>>>>
>>>>> What's a "gash" transformer?
>>>>
>>>> British Royal Navy slang meaning rubbish.
>>>>
>>>> I had to ask the same question, years ago.
>>>
>>>Must've been a lot of years ago - its been in common usage as long as I
>>>can
>>>remember.
>>
>> ---
>> But you've already demonstrated that you have an extremely short
>> attention span,
>
>Nothing of the sort - you're extremely boring.

---
Argumentum ad hominem.
---

>> so if the first time you ever heard it was a day or
>> two ago, in this thread, you'd probably think it was years ago if you
>> remembered it at all.
>
>
>What impaired your reading comprehension skills so severely?!

---
Straw man
---

>If you were dropped on your head when you were little, you should've grown
>out of it by now!

---
Red herring.

Ho-Hum...

--
JF

[Ian Field]

"John Fields" <jfi...@austininstruments.com> wrote in message

news:2557k8tperh92gpk3...@4ax.com...

Well you would - you're an addled old druggie.

[John Fields]

On Sat, 16 Mar 2013 15:57:49 -0000, "Ian Field"

---
Argumentum ad hominem.

--
JF