| SCHEMAS |
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| Pay attention: A and B AC voltages have to be in phase D1 : 10 diodes 1N4007 (1 kV @ 1 A), in serie D2 : 2 diodes 1N4007 in serie C : 500 pF @ 20 kV doorknob R1 : 4.8 kohms @ 20 watts C1 : 2 nF @ 20 kV ceramic R3 : 90 ohms @ 5 watts C2 : 1 nF @ 3 kV polipropilene R2 : 200 kohms @ 5 watts tube : EL509 (final stage of horisontal deflection in colour TVs) L1 : the primary coil wound on a grey PVC pipe with 4.33 inches diameter. There are 22 turns of insulated copper wire, the first ten wound with no spaces, the next 12 turns with 1 cm spaces interturns to increase the coupling and having tapping points at each turn, total wound lenght = 7.48 inches, tunned at the 18-th turn. L2 : feedback coil wound on a paper form 2.36 inches above the primary, 19 turns of magnet wire 0.5 mm diameter, it can slide up and down on the primary form L3 : 10 turns of insulated 1 mm copper wire wound on the R3 resistor L4 : the secondary is wound on a PVC form with 2 inches diameter. Wound lenght = 18.89 inches, 2500 turns with thin wire (0.125 mm) Topload: different sizes of metalic bells colected from electric ring bells Ground : home water pipe |
| THE DOUBLER SCHEMA ( FOR CW MODE) |
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| D1, D2 : 10 diodes 1N4007 in serie C1, C2 : 1 uF @ 6.3 kV oil paper caps |