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Talema toroidal transformer

Discussion in 'Electronic Basics' started by eatmorepies, Mar 9, 2013.

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  1. eatmorepies

    eatmorepies Guest

    I have a toroidal transformer.

    It is marked: Talema TVR 2518 7702-P2S2

    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.

  2. ED

    ED Guest

    Try here:
  3. Phil Allison

    Phil Allison Guest


    ** 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

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

    .... Phil
  4. Phil Allison

    Phil Allison Guest

    ** 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
  5. eatmorepies

    eatmorepies Guest

    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.

  6. Phil Allison

    Phil Allison Guest

    ** So it is a mains tranny for 230/240V power and the primary is the NOT
    blue and brown pair ??


    A 40 ohms primary corresponds to an 80VA rating.

    ..... Phil
  7. Fred Abse

    Fred Abse Guest

    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".
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