Crystal Radio, Ferrite Coil Model #1 (4K) скачать в хорошем качестве

Crystal Radio, Ferrite Coil Model #1 (4K)

This is my first attempt at a ferrite core crystal radio. It cost around $40 in new components I had to buy. The build went well. There might be some tricks worth copying. I won't recommend other people build it, it has low sensitivity and the selectivity does not matter because there's nothing to select! MATERIALS Ferrite Rod 100x10mm, manganese zinc magnetic permeability 1K 2x hold down blocks 32 AWG wire 0.2032mm; Windings: 10/60/40 in the SAME DIRECTION Resistor 10k-40k ohms Variable cap: 0 to 400 pF or 0 to 500pf Variable cap mount Brass washers Stainless screws Crystal earphone 1N34a diode 3D Printed Ferrite bar holders https://www.thingiverse.com/thing:652... 3D Printed Mica Variable Capacitor Mount https://www.thingiverse.com/thing:652... CHAPTERS 00:00 Introduction 00:15 Parts 01:38 Circuit diagram 04:03 Parts dimensions 04:52 Construction, ferrite rod wrapping 08:11 Main coil 09:00 Slider plan 10:03 Slider cores in place 11:49 Ferrite coils done 12:23 Board parts layout 14:17 Build it 15:39 Built & Fixes 18:00 On the scope 20:36 Conclusion