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For the term "air variable 1 uf capacitor kapagen".

Joule Thief: JTBasic with Loopstick and Capacitor: Mode Switching

I took a standard loopstick 1-10 mHy variable inductor and wound a “primary” on top of the loopstick’s original coils. I used this arrangement as the inductor in my JTBasic testbed, with the 2n2222a…

Magnetic Resonance Amplifier 3: Capacitor Instead Of Piezo Element

Please watch the first two videos first. Here I take the Piezo element out of the circuit and replace it with a capacitor of similar value. The circuit behaves nearly the same as before…