• InverseParallax@lemmy.world
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    2 months ago

    Meh, you could do signal amplification via transformers and tuned resonators.

    It sucked, but it was possible.

    That’s how we had telephones before we had tubes.

    • Limonene@lemmy.world
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      2 months ago

      Transformers can increase voltage while decreasing current, or increase current while decreasing voltage, but can’t increase a signal’s power.