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

 

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.

 

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.

 

Many thanks guys. That does make a lot of sense.

 

Would it be possible to put three transformers in parallel?

I presume the ratios would be different.

 

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.