itube Posted April 19, 2016 Share Posted April 19, 2016 (edited) Are cineva un convertor facut/reglat pentru CCIR-OIRT ? Am cautat pe Google dar nu am gasit. Edited April 21, 2016 by itube Link to comment
Vasyl Posted April 19, 2016 Share Posted April 19, 2016 (edited) http://www.s-led.ru/312-shema-konvertera-na-osnove-mikroshemy-la1185.html http://radioskot.ru/publ/fm_konverter/1-1-0-637 http://radiokot.ru/forum/viewtopic.php?f=28&t=8107 Edited April 19, 2016 by Vasyl Link to comment
itube Posted April 19, 2016 Author Share Posted April 19, 2016 @Vasyl, multumesc, dar vreau sa-l cumpar, nu am timp de facut/reglat. Link to comment
yo9gcc Posted April 19, 2016 Share Posted April 19, 2016 (edited) Parca am vazut la conexelectronic punct ro, acum sunt pe tf. si este mai greu sa caut. Sper ea nu se considere reclama! Se pare ca este sub forma de kit!! Edited April 19, 2016 by yo9gcc Link to comment
itube Posted April 19, 2016 Author Share Posted April 19, 2016 Nu-l mai au in oferta. Link to comment
+_Florin_+ Posted April 19, 2016 Share Posted April 19, 2016 Nu se mai gasesc gata facute, iar variantele prezentate de @Vasyl sunt simple si usor de realizat. Personal as aborda-o pe prima. Exista si varianta extrem de simpla a modificarii circuitelor oscilante adaugand doua consensatoare paralel in cazul OIRT/CCIR. Mai complicat ar fi invers ... Link to comment
itube Posted April 19, 2016 Author Share Posted April 19, 2016 In cazul OIRT-CCIR este complicat si nu invers. Link to comment
+_Florin_+ Posted April 21, 2016 Share Posted April 21, 2016 Ca sa receptionezi banda OIRT 65 ... 73 MHz cu un receptor CCIR (88 ... 108 MHz) adica OIRT/CCIR se monteaza doua condensatoare potrivite in paralel. Unul cu circuitul oscilant de intrare (de semnal) si celalalt cu circuitul oscilatorului local. Pentru a le "cobori" in frecventa. E cea mai simpla metoda, se aplica inainte de '89 aparatelor occidentale aduse la noi. Pentru a transfera CCIR in OIRT e mai complicat a modifica circuitele acordate, fiind recomandabil un convertor. Se pare ca e o neintelegere, de fapt tu doresti varianta 2. Link to comment
itube Posted April 21, 2016 Author Share Posted April 21, 2016 M-am exprimat gresit, imi trebuie un convertor CCIR-OIRT. Link to comment
comanici Posted April 21, 2016 Share Posted April 21, 2016 http://www.tme.eu/ro/details/zsm-246/kituri-de-montare/ Link to comment
itube Posted April 21, 2016 Author Share Posted April 21, 2016 L-am comandat, cred ca maine ajunge. Link to comment
mirceacra Posted April 29, 2016 Share Posted April 29, 2016 Te rog sa ne tii la curent cum e si cum functioneaza , multumesc ! Link to comment
morocanosul Posted April 29, 2016 Share Posted April 29, 2016 Ca sa receptionezi banda OIRT 65 ... 73 MHz cu un receptor CCIR (88 ... 108 MHz) adica OIRT/CCIR se monteaza doua condensatoare potrivite in paralel. Unul cu circuitul oscilant de intrare (de semnal) si celalalt cu circuitul oscilatorului local. Pentru a le "cobori" in frecventa. E cea mai simpla metoda, se aplica inainte de '89 aparatelor occidentale aduse la noi. Pentru a transfera CCIR in OIRT e mai complicat a modifica circuitele acordate, fiind recomandabil un convertor. Se pare ca e o neintelegere, de fapt tu doresti varianta 2. Perfect de acord,metoda verificata,functionala...cred ca C-urile erau undeva in jurul a 1,8-2,2 pF,nu mai retin exact....a trecut ceva vreme...! Link to comment
itube Posted April 29, 2016 Author Share Posted April 29, 2016 Functioneaza acceptabil. Montajul arata asa Link to comment
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