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Monitoring Aktivni i pasivni zvučnici, slu?alice, pojačala

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Old 05-07-2010, 11:18 AM   #51
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Default Re: Hypex UCD 180 HG *MADE IN SERBIA*

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mozete se vi zezati ali je napajanje najbitniji deo pojacala, poddimenzionisano napajanje,
Sa ovim se slazem, ali...
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slabiji trafo ili manjak filterskih elektrolita, dovodi to toga da pojacalo preko polovine pojacanje ima veliki THD, koji je u ovim pricama izuzetno bitan,
Ako ima spomenutih problema sa "velikim THD" onda je problem u pogresnom dizajnu.... a ne o "demokratskom izboru" vise ili manje filterskih kondenzatora.
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kod dimenzionisanja napajanja uzima se nekih 2000uF po 1A struje koje pojacalo vuce, za filterske elektrolite,
Originalno napajanje ima sasvim dovoljno elektrolitskih kondenzatora... mozda samo izgledaju fizicki manji nego sto ocekujes... treba imati u vidu da je tehnologija elektrolitskih kondenzatora uznapredovala u medjuvremenu...
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u klasi A cak i dosta vise, u klasi A se cak uzima i 4 puta jaci trafo od zbira snage oba kanala, u klasi AB, koju najvise koristimo nekih 1,5 do 2 puta jaci trafo,
Sve sto pricas nema preterano puno veze sa klasom u kojoj radi pojacalo nego sa njegovom proracunatom snagom
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preporucljivo je da je napajanje stabilisano, a ovo hypex koliko vidim nije,
Nije neophodno da bude stabilisano napajanje ako se dizajnira pojacavac kod koga je vec u njemu samom, ukljuceno potiskivanje varijacije napona napajanja 60dB ili vise... i to je elegantnije resenje...
Znas li primer komercijalnog pojacala snage koje ima stabilisano napajanje?

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audiofili obavezno idu na tranzistorska pojacala

Audiofili obicno traze, koliko znam, veoma efikasne zvucnike i CEVNA pojacala (2-5W po kanalu)... ali dobro...
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bas me cudi da jedno ovako profesionalno u izlazu ima IC
Aaaa.... gde ti vidis IC u izlazu?

pozdrav

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Last edited by boggy; 05-07-2010 at 11:26 AM.
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Old 05-07-2010, 02:16 PM   #52
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Default Re: Hypex UCD 180 HG *MADE IN SERBIA*

boggy u cemu se razlikuje ovo pojacalo od ovog recimo http://img21.imageshack.us/i/sansuiaud77x4.jpg/ i jel mozes, molim te, da bacis neke linkove ka literaturi o pojacalima (tipovima itd..)?

thx!
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Old 05-07-2010, 02:30 PM   #53
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Default Re: Hypex UCD 180 HG *MADE IN SERBIA*

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boggy u cemu se razlikuje ovo pojacalo od ovog recimo http://img21.imageshack.us/i/sansuiaud77x4.jpg/
U osnovnom dizajnu se razlikuju.. a jos spomenuti Sansui je i rezultat stare tehnologijie... makar i izgledao prilicno "mocno"...

Ovde se govori o zvucnoj slicnosti sa konkretno ovim dole pojacalom

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i jel mozes, molim te, da bacis neke linkove ka literaturi o pojacalima (tipovima itd..)?

thx!
U svakoj klasi pojacala postoje dobro i lose dizajnirana pojacala... nevezano za klasu (ma sta marketing govorio)... u ovom slucaju govorimo o pojacalu koje za deo cene donosi zvucni kvalitet skupljeg... samim tim se podrazumeva (za ocekivati je) da su oba dizajnirana odlicno.

nesto o klasama pojacavaca mozes naci na wikipediji dole imas linkove za literaturu...

Samo imaj u vidu da naziv "class" nema nikakve veze sa kvalitetom!....

pozdrav

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Old 08-07-2010, 06:36 PM   #54
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Default Re: Hypex UCD 180 HG *MADE IN SERBIA*

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ja ti sve na to gledam ko' da uzmes ferrarija i stavis na njega jeftine sava kranj gume...

Sve je to divno i fino ,dok god pojedine ljude ispunjava lepim...ali ostaje kljucno pitanjie,?????? po kojim putevima, cete ,voziti ovakva vozila...
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Old 08-07-2010, 07:06 PM   #55
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Default Re: Hypex UCD 180 HG *MADE IN SERBIA*

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Sve je to divno i fino ,dok god pojedine ljude ispunjava lepim...ali ostaje kljucno pitanjie,?????? po kojim putevima, cete ,voziti ovakva vozila...
Zavisi od vozaca !
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Old 09-07-2010, 12:23 AM   #56
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Default Re: Hypex UCD 180 HG *MADE IN SERBIA*

dobar vozac moze i vezanih ociju....sto dovodi do zakljucka da su slike suvise.
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Old 09-07-2010, 12:26 AM   #57
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Default Re: Hypex UCD 180 HG *MADE IN SERBIA*

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dobar vozac moze i vezanih ociju....sto dovodi do zakljucka da su slike suvise.
Kao u nasem kultnom filmu
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Old 09-07-2010, 12:33 AM   #58
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Default Re: Hypex UCD 180 HG *MADE IN SERBIA*

ma salim se ja,..predivno sve to izgleda...i drago mi je da deluje inspirativno na ljubitelje kvalitetnog hardvera...
steta sto je trziste zanemarljivo malo..
cestitke svim ucesnicima u projektu , kao i obozavaocima i fanovima istog...
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Old 14-07-2011, 07:32 PM   #59
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Default Re: Hypex UCD 180 HG *MADE IN SERBIA*

evo, da osvje?im malo temu, a hvala Ivanu na otkrivljenju ovog proizvođača!


daklem,treba mi pomoć
planiram sklopiti ovo pojačalo, pa gledam izlazne toroidne transformatore bih naručio kod nas da ih namotaju,
ali nigdje u specifikacijama ne pi?e snaga na sekundarima.

točnije,zanima me koliko struje guta ovaj 13-0-13V auxiliary supply,
(drugi izlaz,30V, je glavni, amplifier main supply)


tnx unapred i long live DIY!
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