7 thoughts on “instrument-a-day 4: remote interference

  1. the kit looks nice but for us diy people building and soldering urself is nice so do you have a keyword or something if i should search for a free schematic on the www.
    is it understood correctly if i see it as a normal amplifier with an inducttion coil connected as input?

    well, nice project!!

  2. Yes! Put a coil at the input of a high-impedance amplifier. You can also try searching for “telephone amplifier” schematics – the idea is that people who are hard-of-hearing can put the coil on their telephone receiver to amplify it.

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