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]

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

 

[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"

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.

** 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]

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

John

 

[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

 

[Fred Abse]

What's a "gash" transformer?

British Royal Navy slang meaning rubbish.

I had to ask the same question, years ago.

British (conventional) submarines disposed of their trash, whilst
submerged, using a "gash gun".