Transformers

Discussion in 'General Electronics Chat' started by Sparky49, Oct 15, 2012.

  1. Sparky49

    Thread Starter Active Member

    Jul 16, 2011
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    Hi everyone.

    I'm looking at vacuum tubes (just interested!).

    However, every schematic seems to include a transformer with many secondaries, I understand what these are for, but are these still made? I've had a look, but it seems that one cannot get transformers like these.

    This as an example:


    Three different secondaries, but all at different potentials.

    Were people expected to build them themselves?

    Many thanks,
    Sparky
     
  2. Audioguru

    New Member

    Dec 20, 2007
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    896
    60 and 70 years ago ALL electronic products used vacuum tubes. The transformers were designed for them.

    Today, almost nothing uses vacuum tubes and their transformers.
     
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  3. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    Back when tubes/valves were in widespread use, it was pretty easy to find a wide variety of such transformers. Nowadays, if you can find them they are quite expensive and the selections are few. Copper is very expensive. Transformers for tube/valve projects are large and heavy.

    You can make your own, but if isn't easy.
     
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  4. Sparky49

    Thread Starter Active Member

    Jul 16, 2011
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    Many thanks guys. That does make a lot of sense.
     
  5. Sparky49

    Thread Starter Active Member

    Jul 16, 2011
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    Would it be possible to put three transformers in parallel?

    I presume the ratios would be different.
     
  6. strantor

    AAC Fanatic!

    Oct 3, 2010
    4,302
    1,988
    you could try inside TVs. Last I worked on a RCA rear projection TV <10yrs old, it had one of those mulit-multi-tap transformers in it. Maybe you could find one with enough options to fit your needs.
     
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