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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Ale on ho chce mat v oleji.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">To meni situaciu.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">j.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext"> Hw-list [mailto:hw-list-bounces@list.hw.cz]
<b>On Behalf Of </b>Daniel Valuch<br>
<b>Sent:</b> Thursday, August 13, 2015 5:06 PM<br>
<b>To:</b> HW-news<br>
<b>Subject:</b> Re: 200W odpor , asi vyroba?<o:p></o:p></span></p>
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<p class="MsoNormal">asi si nerozumieme. Skuste vypocitat aka bude hustota vykonu, stracajuceho sa z povrchu 40cm dlheho dratu s priemerom 0.1mm (to bolo zadanie). Bez toho aby bol vyhriaty minimalne do bielo-oranzova to s velkou pravdepodobnostou nepojde.
Udrzat konstantne elektricke vlastnosti uz vobec nie. Ziarovka...<br>
<br>
<br>
<br>
On 13/08/2015 16:35, <a href="mailto:cipisek.cipr@seznam.cz">cipisek.cipr@seznam.cz</a> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><i>Co jineho je 200W odpor nez zarovka, mysleno ve smyslu zarizeni jehoz ucelem je vyzarit 200W tepla a pritom si udrzet konstantni eletricke vlastnosti. Odpor vlakna zarovky se s teplotou vyrazne meni, Teplotní
</i>součinitel odporu manganinu je 1800x lepší než wolframu. <br>
Nejake ty super odopry jsou sice leptany z folie, ale tak jako tak to je bud primo manganin nebo jemu podobna slitina Mn+ neco , viz treba
<a href="http://www.isabellenhuette.de/fileadmin/content/praezisions-leistungswiderstaende/RUG-Z.PDF">
http://www.isabellenhuette.de/fileadmin/content/praezisions-leistungswiderstaende/RUG-Z.PDF</a><br>
Tim ze je to mensi tak stoupa problem s odvodem tepla. <br>
Jediny problem vidim v parazitni L, Isabellenhuette ma L 10nH.<br>
ja si cvicne zadal do prvni kalkulacky pro vypocet indukcnosti vzduchve civky <br>
<a href="http://www.radio-foto.eu/radio/civka.php">http://www.radio-foto.eu/radio/civka.php</a><br>
d=6.5mm, l=150mm, pocet zavitu 20 <br>
a vypadlo na me 113nH <br>
s cimz nemam problem, ale je to pravda podstatne mene nez vami uvadenych 400nH pro 40cm dratu.<br>
<br>
Ciprian<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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