<div dir="ltr"> V radio-amaterske praxi uz elektronky pomalu konci. Videl jsem vloni v Německu na burze nabidku novych BLF188 za 130EUR, to uz nema smysl s elkami delat.... <div><a href="https://3.bp.blogspot.com/-04_8v8zjvy4/Wihcyq1ToeI/AAAAAAAAByg/8k1A30e0io0Q1mroRqfdBLF-inbS9mDSACLcBGAs/s640/IMG_20170715_145658.jpg">https://3.bp.blogspot.com/-04_8v8zjvy4/Wihcyq1ToeI/AAAAAAAAByg/8k1A30e0io0Q1mroRqfdBLF-inbS9mDSACLcBGAs/s640/IMG_20170715_145658.jpg</a><br></div><div> Na kolik vysel ten vyvojovy kit? </div></div><div id="DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2"><br> <table style="border-top:1px solid #d3d4de">
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<a href="#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2" width="1" height="1"></a></div><div class="gmail_extra"><br><div class="gmail_quote">2018-04-19 22:49 GMT+02:00 balu <span dir="ltr"><<a href="mailto:balu@k-net.fr" target="_blank">balu@k-net.fr</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">pre zaujimavost, ako pokrocila technologia vysokofrekvencnych MOSFET tranzistorov... Z jedneho tranzistora sa vytlacit 1.8kW a znesie plne neprisposobenie pri lubovolnej faze (PSV takmer nekonecno), frekvencne 1-400MHz. A stoji ca. 250 Eur... Neuveritelne...<br>
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Ideme nahradit niekolko starych jedno-elektronkovych zosilnovacov vela-tranzistorovymi, parametre zosilnovaca su 100MHz a 400kW, pulzy so striedou ca. 5 percent.<br>
Tranzistory maju trochu ine charakteristiky ako elektronky, takze sa s tym musim naucit pracovat z pohladu riadiacich sluciek, saturacie atd.<br>
Objednal som si preto "vyvojovy kit" co je v principe doska so spominanym tranzistorom. Chvilu trvalo kym som nasiel dostatocne mnozstvo kondenzatorov a dostatocne vykonnu pajkovacku aby som vyhrial ten rozvodny drat, ale uz veselo pulzuje. Napajacie napatie 65V, vydrzi to uplne vsetko vratane tvrdeho skratu na vystupe...<br>
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<a href="http://dvaluch.web.cern.ch/dvaluch/temp/amplifier/" rel="noreferrer" target="_blank">http://dvaluch.web.cern.ch/dva<wbr>luch/temp/amplifier/</a><br>
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Typicke rozhlasove a televizne vysielace sa teraz daju postavit s jednym az piatimi tranzistormi.<br>
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b.<br>
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