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APEX AX11 : Simple 100W/4R Amp - Printable Version

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RE: APEX AX11 : Simple 100W/4R Amp - HomeMadeAudioProject - 12-22-2019

poodavno sam imao želju da ojačam AX11 do maksimuma a bez H-step dela,i krenuo baš od njega:




RE: APEX AX11 : Simple 100W/4R Amp - apexaudio - 12-23-2019

(12-22-2019, 10:33 PM)HomeMadeAudioProject Wrote: poodavno sam imao želju da ojačam AX11 do maksimuma a bez H-step dela,i krenuo baš od njega:

Postoji najjaca verzija AX11 bez H-stepa, a to je BX22. Postoji i plocica, a bilo je i uspesnih gradnji.




RE: APEX AX11 : Simple 100W/4R Amp - HomeMadeAudioProject - 12-23-2019

ha haa - ovaj će ostati u AB-klasi...



još nije isproveravano,i treba da postavim nazive i redne brojeve delova kako bi sprint mogao izbaciti kompletan spisak  delova.


RE: APEX AX11 : Simple 100W/4R Amp - HomeMadeAudioProject - 12-23-2019

C1 4u7 1 --- --- --- R--- Top
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ako to sad nije to - onda ću i sam imati problem oko njega. koliko sam gledao i video-to je to.


RE: APEX AX11 : Simple 100W/4R Amp - Dackotronic - 12-23-2019

Odlicno odradjena plocica , svaka cast  Rolleyes XXXL moja velicina  Big Grin


RE: APEX AX11 : Simple 100W/4R Amp - HomeMadeAudioProject - 12-23-2019

hvala Dacko hvala! ma ja to i po sebi... ? a ima i ona ruska:"Bolje tri tone previše nego tri grama premalo..." ja idem po prvoj opciji ????


RE: APEX AX11 : Simple 100W/4R Amp - Dackotronic - 12-24-2019

(12-16-2019, 03:02 PM)apexaudio Wrote: APEX CA8

Vecerasnja zanimacija , pcb za CA8 Shy  trebalo bi da je sve kako treba ali kod mene su moguce greske Undecided ja ih za sada nevidim .


.lay6   APEX CA8.lay6 (Size: 174,72 KB / Downloads: 1)


RE: APEX AX11 : Simple 100W/4R Amp - apexaudio - 12-24-2019

Trimer je pogresno povezan...


RE: APEX AX11 : Simple 100W/4R Amp - Dackotronic - 12-24-2019

(12-24-2019, 09:51 AM)apexaudio Wrote: Trimer je pogresno povezan...

Hvala Mile , greska ispravljena . Neverovatno mi kako ja to nevidim odmah  39 valda treba da prenoci ...


.lay6   APEX CA8-.lay6 (Size: 173,77 KB / Downloads: 3)


RE: APEX AX11 : Simple 100W/4R Amp - apexaudio - 12-24-2019

(12-24-2019, 11:51 AM)Dackotronic Wrote:
(12-24-2019, 09:51 AM)apexaudio Wrote: Trimer je pogresno povezan...

Hvala Mile , greska ispravljena . Neverovatno mi kako ja to nevidim odmah  39 valda treba da prenoci ...

Hvala za ovu plocicu, verujem da ce biti nekih gradnji u buducnosti. Sve cesce na slusnim testovima pobedjuju pojacala bazirana na koriscenju OP ampova bez obzira da li su u pitanju CFA, VFA ili kombinovane topologije kao kod A9.


RE: APEX AX11 : Simple 100W/4R Amp - HomeMadeAudioProject - 01-04-2020

ako nema grešaka kontam da je ovo konačna verzija moje pločice. dodao sam APEX kontrole(Power Signal Clip) i izmenio nešto oko kondenzatora iza osigurača:



C1 4u7 1 --- --- --- Top
C2 4u7 2 --- --- --- Top
C3 220p 3 --- --- --- Top
C4 100u63V 4 --- --- --- Top
C5 47u63V 5 --- --- --- Top
C6 100n 6 --- --- --- Top
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C1.A smd 33 --- --- --- Top
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Clip RED 37 --- --- --- Top
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RE: APEX AX11 : Simple 100W/4R Amp - ivanlukic - 01-04-2020

Bilo je na forumu više projekata sa LME driverskim IC, a i to je neka vrsta OP. Jedino što nisam video, a što bi bilo i daleko jeftinije od LME, je TDA7250. To je stereo driver IC tako da je i vrlo praktičan. Nema štelovanja bilo koje vrste a jedino ograničenje je da ne može da se napravi pojačalo jače od 60W ali ja i ne pravim jaka pojačala (za razglase). Možda negde kod nas mogu da se kupe TDA7250 driverski IC? Možda topologije sa OP na ulazu daju tako dobre subjektivne rezultate zato što je ceo ulazni stepen pojačala u tom slučaju spakovan na jako mali prostor?


RE: APEX AX11 : Simple 100W/4R Amp - apexaudio - 01-04-2020

Postoji tema o pojacalima koja koriste OP amp sa plivajucim napajanjem u odnosu na izlazni napon.

https://forum.yu3ma.net/thread-1011-page-7.html

 Na ovaj nacin izbegnut je kompletan VAS stepen, pojacalo moze da koristi bilo koji napon napajanja koji podrzavaju izlazni tranzistori, a obezbedjena je rail to rail pobuda. Koriste se standardni OP ampovi a ne specijalni drajverski koji su prevazidjeni i predstavljaju veliki korak nazad u svim karakteristikama.




RE: APEX AX11 : Simple 100W/4R Amp - ghostrider - 01-04-2020

(01-04-2020, 07:46 PM)apexaudio Wrote: Postoji tema o pojacalima koja koriste OP amp sa plivajucim napajanjem u odnosu na izlazni napon.

https://forum.yu3ma.net/thread-1011-page-7.html

 Na ovaj nacin izbegnut je kompletan VAS stepen, pojacalo moze da koristi bilo koji napon napajanja koji podrzavaju izlazni tranzistori, a obezbedjena je rail to rail pobuda. Koriste se standardni OP ampovi a ne specijalni drajverski koji su prevazidjeni i predstavljaju veliki korak nazad u svim karakteristikama.

Mile da li ovde moze da se koristi bilo koji bipolarni op amp novije generacije


RE: APEX AX11 : Simple 100W/4R Amp - apexaudio - 01-04-2020

Iako deluje previse lepo da bi bilo istinito, topologija je proverena. Mislio sam da ce u buducnosti ova topologija biti najzastupljenija pored D klase. Prednosti su veliki raspon snaga  od 30W do 3000W ako nekome treba i nema visokonaponskih VAS tranzistora koji rade sa velikom disipacijom. Izbor VAS tranzistora je veliki problem kod svih topologija , a ovde ih uopste nema, potreban je jedan kvalitetan OP amp i dva izlazna tranzistora za high-end pojacalo preko 100W snage. Nikako mi nije jasno zasto se ova superiorna topologija ignorise!?




RE: APEX AX11 : Simple 100W/4R Amp - apexaudio - 01-04-2020

(01-04-2020, 07:58 PM)ghostrider Wrote:
(01-04-2020, 07:46 PM)apexaudio Wrote: Postoji tema o pojacalima koja koriste OP amp sa plivajucim napajanjem u odnosu na izlazni napon.

https://forum.yu3ma.net/thread-1011-page-7.html

 Na ovaj nacin izbegnut je kompletan VAS stepen, pojacalo moze da koristi bilo koji napon napajanja koji podrzavaju izlazni tranzistori, a obezbedjena je rail to rail pobuda. Koriste se standardni OP ampovi a ne specijalni drajverski koji su prevazidjeni i predstavljaju veliki korak nazad u svim karakteristikama.

Mile da li ovde moze da se koristi bilo koji bipolarni op amp novije generacije

Moze, ali da ne bude CFA sto nije problem jer je vecina OP ampova VFA. Ja sam pored ovog MC koristio i standardni NE5532. Bez obzira na modu da se koriste diskretni OP ampovi oni su inferiorni u odnosu na integrisane cak i kad se koriste dupli fetovi na ulazu i smd komponente.


RE: APEX AX11 : Simple 100W/4R Amp - Bocko - 01-04-2020

&HMAP:
Komšo, gledam malko ovaj tvoj AX11 XXXL i na slikici mi nešto nije jasno, 250W8Ohm i 150W8Ohm? Pozzz


RE: APEX AX11 : Simple 100W/4R Amp - HomeMadeAudioProject - 01-04-2020

e jbg...greška u štampariji... prepraviću to,hvala Bocko! nadam se da je to jedina greška-sa tim bi se dalo živeti ?


RE: APEX AX11 : Simple 100W/4R Amp - HomeMadeAudioProject - 01-05-2020

(01-04-2020, 09:05 PM)Bocko Wrote: &HMAP:
Komšo, gledam malko ovaj tvoj AX11 XXXL i na slikici mi nešto nije jasno, 250W8Ohm i 150W8Ohm? Pozzz

ispravljeno (valjda...)


RE: APEX AX11 : Simple 100W/4R Amp - samuki - 01-05-2020

150w je sa cetiri para izlaznih a 280w je sa sest pari izlaznih ! Jel tako?