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Tranzistorski 1.8-7.0Mhz Linear
#30
Ma trafo napolju, posto on ima 2x16VAC/1KW greota da ga zarobim za ovo kad mozda moze lepo da tera neko audio pojacalo do 2x60W bez muke  Big Grin


Sto se impedanse tice i ovako nije ubodeno kako treba tako da ne brini. Znam tek nesto za racun..... Na 50 Ohm power metru i opterecenju gledaj kako se ponasa jednostavno krene da opada snaga kada preteras sa brojem navoja, cim malo opadne vracas na prethodno to je realno motanje 1:4 ili mozda 1:5. E sada ti imas 22V i 4A to tranzistori mogu da povuku sto se svodi na 22/4=5.5ohm pa sledi potrebna impedansa 50/5.5=9.09ohm  sto ti je odnos 1:9, a realno motanje je koren iz 9 dakle dobijemo 1:3 ako imas 22VDC i potrosnju 4A. Zna taj racun da se izrazim da "pobegne" ako napon bas mnogo padne, onda se kvare i drugi parametri oko mirne struje, zato sam ja uzeo ovoliki trafo za mozda 200w koliko cu da teram a i da imam ako nekad radim neko audio pojacalo (docice i to na red).

Ne znam puno oko proracuna ove povratne sprege sa drejna na gate, vidim da za mnoge IRF5xx tranzistore koriste 100nf i 470R na red, ono sto i mene buni jeste kako se to racuna sa poraston napona, mogu da uzmem ovo kao neku referencu ali da li je to bas tako nisam siguran cak sta vise znam da nije  Tongue 

12v/470r=0.025A    25mA*12v=0.3W , sada iz ovoga vidim sta se koristi za 5W pojacalo to mu dodje oko 16x od snage koju izbaci, tako ja racunam i radi, ali najpravilnije bi bilo videti na osiloskopu da li ulazni signal se razlikuje od izlaznog za vise od 180 stepeni e onda proracunom dovesti to da ne osciluje.

I na izlazu obavezno jedan makar petoclani low pass filter jos bolje ce raditi.
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Messages In This Thread
Tranzistorski 1.8-7.0Mhz Linear - by Omegakg - 08-17-2015, 12:18 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by mikikg - 08-17-2015, 01:20 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Omegakg - 08-17-2015, 01:30 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by mikikg - 08-17-2015, 01:41 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by mikikg - 08-17-2015, 01:59 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Omegakg - 08-17-2015, 02:08 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by mikikg - 08-17-2015, 02:18 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Omegakg - 08-17-2015, 02:19 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Omegakg - 08-17-2015, 02:50 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Omegakg - 08-23-2015, 02:53 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Omegakg - 08-28-2015, 10:12 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by mikikg - 08-28-2015, 11:35 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Omegakg - 08-29-2015, 10:14 AM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Omegakg - 02-28-2016, 05:50 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Omegakg - 02-29-2016, 08:31 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Omegakg - 06-06-2016, 08:47 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Dragan83 - 06-06-2016, 10:16 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Omegakg - 06-07-2016, 07:52 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Omegakg - 06-08-2016, 08:02 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Dragan83 - 06-09-2016, 12:17 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Omegakg - 06-10-2016, 08:54 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Omegakg - 06-12-2016, 08:51 AM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Omegakg - 09-07-2016, 06:28 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Omegakg - 12-18-2016, 11:58 AM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Omegakg - 12-18-2016, 03:35 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Omegakg - 12-18-2016, 05:09 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by emiSAr - 12-18-2016, 06:00 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Omegakg - 12-18-2016, 09:01 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Omegakg - 12-18-2016, 10:07 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Omegakg - 12-18-2016, 10:54 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by emiSAr - 12-18-2016, 11:16 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by yt3mm - 12-19-2016, 11:10 AM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Omegakg - 12-19-2016, 04:42 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Omegakg - 01-16-2017, 10:23 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Dragan83 - 01-17-2017, 09:05 AM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Omegakg - 01-17-2017, 12:30 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Dragan83 - 01-17-2017, 01:27 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by emiSAr - 01-17-2017, 01:51 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Dragan83 - 01-17-2017, 02:03 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Omegakg - 01-17-2017, 08:20 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Dragan83 - 01-18-2017, 08:23 AM
RE: Tranzistorski 1.8-7.0Mhz Linear - by emiSAr - 01-19-2017, 09:16 AM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Omegakg - 01-19-2017, 08:22 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Omegakg - 01-19-2017, 08:49 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Omegakg - 01-19-2017, 09:11 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Dragan83 - 01-19-2017, 10:00 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Omegakg - 01-30-2017, 09:54 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by emiSAr - 01-30-2017, 11:11 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Omegakg - 01-31-2017, 09:59 AM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Dragan83 - 01-31-2017, 08:33 AM
RE: Tranzistorski 1.8-7.0Mhz Linear - by emiSAr - 01-31-2017, 11:05 AM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Omegakg - 01-31-2017, 11:46 AM
RE: Tranzistorski 1.8-7.0Mhz Linear - by emiSAr - 01-31-2017, 01:10 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Omegakg - 01-31-2017, 03:48 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Omegakg - 01-31-2017, 09:51 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Omegakg - 02-01-2017, 10:47 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by emiSAr - 02-01-2017, 11:47 PM
RE: Tranzistorski 1.8-7.0Mhz Linear - by Omegakg - 02-02-2017, 11:50 AM

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