Allan Sterling pyysi mun firman pääinsinööriä kommentoimaan tätä Jussin linkittämää videota, nää samat kommentit on sen videon Kommentointiosiossa.
http://www.youtube.com/watch?v=zF9fl4_eMiY
##Hi! A nice demonstration! Question: Have you measured the frequency it oscillates on? It should be easy by placing a wire near it which is connected to an oscilloscope or counter or any HF receiver or measuring device you might have. - continued...
.. continued: Suggestion: You should be able to lit a small flashlight incandescent bulb by placing it amid the aerial wire instead of leds. A bulb does not need diode rectifier to light up by HF current like the leds need. Your operating voltage of batteries in series appears to be about 36 volts so I would suggest start experimenting with about 24-48 V 0,5-1 W bulbs. Small bulbs are commonly used as aerial current indicators of low power HF transmitters. - continued...
... continued: Unrectified coil meters are no good for showing HF aerial currents quite as you demonstrated. Congrats for making a simple transmitter circuit for high frequency experimenters! Trying it will teach a lot more about practical and curious behavior of high frecuency (HF) currents than bare schoolbooks can! As a ham radio experimenter of practical low power HF circuits I appreciate your way of reporting about your experiments to public. Regards, OH7HJ, Finland.
JHartikka
Tip: Where to get small bulbs for high frequency (HF) current experiments? Good source for abt. 24 ... 36 V low current bulbs are those decorative Christmas lights that are connected direct to mains. These Christmas decorations have many bulbs connected in series and they start to glow from currents of tens of mA or so. Just extract as many bulbs as you need. Also the smallest car instrument panel light bulbs mey work well as HF current indicators, particularly the 24 V ones.
Battery current measuring: The batteries of this circuit are also part of a high frecuency current circuit. They make a kind of other half of the aerial. They may act as a capacitive HF lead to ground. So any common multimeter connected to batteries for current will behave funny. It may point too much or too little or even reverse. HF currents jump through their own capacitive shortcuts within the multimeter to its sensitive semiconductor measuring circuits. - continued...
... continued: Then, how to measure reliably battery current? One simple means is to again use a small bulb as a current indicator. A 6 ... 12 V 100 ... 300 mA bulb in series with the batteries should work I guess. Just check correct bulb voltage ans amperage for your circuit by trying with different bulbs. The light intensity of a glowing bulb is a very reliable indicator of true battery current of a HF circuit supply.
JHartikka
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sitten tuohon Vipusen havaitsemaan ilmiöön seuraavia huomioita:
Kaveriani on kiusannut jo pitkään kyseinen hohtovalo, hänellä ne loistaa autotallin ulkovaloina, hä pyysi minua tutkimaan sitä ilmiötä ja kävinkin tonkimassa lampun pohjia, mitään selitystä en löytänyt, vaihdoin jopa vaihe ja nolla johdon keskenään ja edelleen lamput hohtaa vaikka virtakytkin katkaisee.
mittarilla mittasin sitä jännitettä mikä sai lamput hohtamaan ja se oli noin 70milli volttia, käsittämätön ilmiö, mistä avaruudesta se tulee?
Jännite katoaa kun märällä sormella koskettaa virratonta johdinta, siis olematon virtavuoto (lisäys 25.tammikuuta 2012)