Do you guys have any idea where I can find this type of transformer?

I have a AC function generator that outputs a maximum of 20 volts. I need to connect this generator to a Step Down Transformer, keeping the sine wave on the output, for a small educational project I'm working on. The problem is that I can't find a transformer with low input voltage anywhere. I've being looking for days already and the only transformers I found are above 117V on the primary.I and Do you guys have any idea where I can find this type of transformer?

Solution:

Look for small audio transformers or repurpose transformers from old electronics with low input voltage. Check suppliers like Digi-Key or Mouser

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