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Objašnjenje ove sheme skretnice 
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Dajte ljudi pomagajte, ne kužim ovaj dio s midom, tj zašto su 2 konda u seriji, i čemu ovi otpornici na tw, to ziher nisu klasične atenuacije. XO frekve bi trebale bit 450hz i 6500hz.  Svi drajveri su 4ohm. Ak treba još podataka javim

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Thu Feb 16, 2012 5:24 pm
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karlo wrote:
Dajte ljudi pomagajte, ne kužim ovaj dio s midom, tj zašto su 2 konda u seriji, i čemu ovi otpornici na tw, to ziher nisu klasične atenuacije. XO frekve bi trebale bit 450hz i 6500hz.  Svi drajveri su 4ohm. Ak treba još podataka javim

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Koja dva konda su u seriji????

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Thu Feb 16, 2012 8:37 pm
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taman i ja to pisem,valjda misli UPARALELI???


Thu Feb 16, 2012 8:42 pm
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vjerojatno nema kondenzatora od 31,8 uF(ili ga je teško nabaviti), pa su to posložili na taj način

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Thu Feb 16, 2012 9:09 pm
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da, u odnosu jedan prema drugom, tto kuzim, al ne u odnosu. na driver. kapirate? ne znam jesam li se dobro izrazio.


Thu Feb 16, 2012 9:13 pm
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to je HPF sljedi LPF i dobio si bandpass za mid... :respect:

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Thu Feb 16, 2012 9:15 pm
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karlo wrote:
i čemu ovi otpornici na tw


Tamo gdje pise "Tweeter level select" bi se valjda trebala nalazit sklopka s kojom reguliras pojačanje (dB) i ako sam dobro pohvatao ovdje se radi o skretnici sa strminom reza od 12dB, a za tw 6dB

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Last edited by BOKY on Thu Feb 16, 2012 9:27 pm, edited 1 time in total.



Thu Feb 16, 2012 9:26 pm
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gle to kuzim, al kako su dobili 450 i 6500hz? a pogotovo ne kuzim 6500hz hpf za tw. vrijednosti kkonda mi nisu jasne. i cemu sluze otpornici na tw? boky, al nije jedan otpornik u seriji, a jedan u paraleli. kakvi su to sklopovi i cemu sluze?
Ajd bok, pocinje mi koncert :)


Thu Feb 16, 2012 9:29 pm
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pa kad je sklopka zatvorena, samo će kroz gornji otpornik teći stuja i imat ćeš jedno pojačanje, kad tu sklopku otvoriš to će biti serijski spoj otpora i druga vrijednost pojačanja. Vrijednost kondenzatora je dobra za taj rez. Kondenzator spojen u seriji s zvucnikom stvara prepreku niskim frekvencijama a zavojnica visokim.

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Thu Feb 16, 2012 9:38 pm
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ako kažeš da je rez 6500 Hz onda je tweeter sigurno 8 ohma...

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Thu Feb 16, 2012 10:16 pm
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Evo sa dobrog zvuka

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Thu Feb 16, 2012 10:46 pm
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BOKY wrote:
Kondenzator spojen u seriji s zvucnikom stvara prepreku niskim frekvencijama a zavojnica visokim.

ok, kuzim filtere1., 2. itd reda. to mi nije potrebno objasnjavat

the bebe - 4 ohm.  Uocio sam sljedece: zbroj otpora dva otpornika i tw je cca 8ohma, malo vise. Jel tu kvaka, i jel se uopce otpornici i driver mogu zbrajat. bla


Thu Feb 16, 2012 11:58 pm
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Skretnica na midu je samo HP + LP 1. reda, odnosno 6db/oct.
Otpornici su za atenuaciju.... Uvijek se stavlja L-pad...
Imate i thread na forumu... Makar moram po ne znam koji put "dignuti" slike...
A kad već spominjete DZ :

http://www.dobar-zvuk.hr/hi-fi/samogradnja/tablica_atenuacija.htm

Atenuacija je i na visokotoncu, samo se meni osobno ne sviđa način na koji je izvedena :D

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Last edited by sonny on Fri Feb 17, 2012 12:08 am, edited 1 time in total.



Fri Feb 17, 2012 12:06 am
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the bebe - 4 ohm.  Uocio sam sljedece: zbroj otpora dva otpornika i tw je cca 8ohma, malo vise. Jel tu kvaka, i jel se uopce otpornici i driver mogu zbrajat. bla
[/quote]

može zašto nebi moglo...a slažem se sa sonny-em da je malo čudnjikavo izvedena ta atenuacija...

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Fri Feb 17, 2012 12:44 am
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E pa to sa hpf za tw i atenuaciju na njemu me skroz zbunjuje. Jer vrijednost konda na tw je za hpf 12kHz, ako je tw 4ohma, a doista je. Zato pitam jel se "otpori" otpornika i tw zbrajaju? Prema formuli za zbrajanje otpora ispada oko 8 ohma, i onda ima smisla da je hpf na cca 6kHz.
Sonny, jel pričam gluposti, ili to zaista pije vodu?


Fri Feb 17, 2012 1:21 pm
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