Figure. 1 shows a circuit diagram of a wireless microphone, which can be used as part of a small-sized radio. Wireless microphone works in the frequency range 27.0 CB…27,4 MHz using frequency modulation. Transmitter Output Power is several tens of milliwatts.
After prolonged use permanent magnets EIT magneto system demagnetized, Devices lose sensitivity. In order to restore the magnets magnetized, placing in the field of a powerful permanent magnet, For example, magnetron, speaker or, For example, "Electronic pulse setting to magnetize… permanent magnets "  and, usually, намагничивают… Continue Reading
When winding a transformer coil or repair is, that the end of the wire winding sinks between the coil and the coil so cheek, that it does not get a pair of tweezers, although it is still seen. To pull it, you need to use a sewing needle. eye of a needle (corresponding to the diameter of the wire)… Continue Reading
Dismantling PCB without damaging the components and the board is not possible, if you do not remove the solder from the soldering points. Apparatuses and methods for this repeatedly offered [1-4]. but, they are difficult to manufacture and use or ineffective. I use to remove molten soldering iron… Continue Reading
Thin sheet thermoplastic plastics can be welded with a hot iron edge through a 0.2 mm thick PTFE film…0,5 mm. To do this, two sheets of polyethylene are placed on the edge of the table covered with a strip of such fluoroplastic (polychlorinated vinyl), cover with a second strip of fluoroplastic and slowly iron it with pressure so, that… Continue Reading