This step of two transistors has a high input impedance due to the use of FET. We can use BF245 for this function and the bipolar can be BC548. The circuit is from an 1975 American documentation.
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According to what is said, the bugs are the female insects (mosquitoes, muriçocas and others)....
This is the typical configuration for a high voltage triplicator. The configuration can be used...