Zishan Z3

[harumamburo]

can i see how you did it... where to install the capacitors.. i have 100uf 25v and 220uf 16v nichicons here
my zishan version is AK4493. ive seen maxkur's mod and he only support the negative supply of the op amp

Look here:
http://i.piccy.info/i9/f879366e1c4a9...163622_800.jpg
On the previous page

[Genesispogi]

Look here:
http://i.piccy.info/i9/f879366e1c4a9...163622_800.jpg
On the previous page

just did it.. no difference, still has loud popping sound

Capture.JPG

[maxi_funy]

still has loud popping sound

it should be when you turn it on/off. Replace the burson with 1622 and put on a delay capacitor, as you were shown in photo 1622. Or put a relay with a turn-on delay. There are no miracles

[Genesispogi]

it should be when you turn it on/off. Replace the burson with 1622 and put on a delay capacitor, as you were shown in photo 1622. Or put a relay with a turn-on delay. There are no miracles

i will switch to opa1622 then...if thats the only way..

is opa1622 close to the sound quality of burson v5i ?

[maxkur]

Стоковый фильтр Z3 9038

[Genesispogi]

Something is wrong with your setup (mod). I also use V5i-D in my Zishan and don't hear any poping or clicking noise when turning it on.
Upload the full pic of the whole PCB, just want to see what modifications are done.

@maxx-imus1980 , can i see your Z3 with burson v5i-d.. you said yours don't have popping sound.. just want to copy your Mod.

[maxkur]

Пока есть время, чуть подправил мод Z3 CS43198 - в подпор выходного ОУ 2-а электролита Панасоник серии AM 220мкФ 16в вот так поставил. На ОУ внимание не обращаем - ОРА1688 установлен в ожидании прихода OPA1622

[LuiGy]

[QUOTE=maxkur;3190368]Пока есть время, чуть подправил мод Z3 CS43198 - в подпор выходного ОУ 2-а электролита Панасоник серии AM 220мкФ 16в вот так поставил. На ОУ внимание не обращаем - ОРА1688 установлен в ожидании прихода OPA1622

Ну и как по звуку,что они дают эти кондейчики?)

[sanmigel]

Судя по симуляции там есть частота резонанса или что-то вроде того на которой гейн неслабо подрастает, а после этого опять начинает спадать, это запланированное поведение?

Это похоже на поведение в симуляции курильщика.
Вот поведение в симуляции здорового человека

На самом деле, тут, как и в любом фильтре 2го порядка есть добротность и т.д.

[Genesispogi]

Can I use LME49860 as LPF for Z3?

[maxi_funy]

Can I use LME49860 as LPF for Z3?

Yes

[Genesispogi]

I've ordered OPA1622.. and ill be using it as output opamp and use the Burson v5i-d as LPF.. let see

[maxi_funy]

I've ordered OPA1622.. and ill be using it as output opamp and use the Burson v5i-d as LPF.. let see

LPF - SOIC8
Burson - dip8

You won't be able to use V5

[Genesispogi]

LPF - SOIC8
Burson - dip8

You won't be able to use V5

Yup. i know... i will wire it

[Yamato]

Yup. i know... i will wire it

absolutely no point doing so, just use the opamp of appropriate size

[Genesispogi]

already had opa1622.. installed 22uf cap into it to suppress the popping sound.. turn ON pop gone.. but the turn OFF pop is still so loud.

[Genesispogi]

is the LPF affect the Phone Out or PO, or it's just for LO

[fgfgfg]

is the LPF affect the Phone Out or PO, or it's just for LO

everything, it is a part of chain

[Genesispogi]

everything, it is a part of chain

So it does... DAC -> LPF -> Main OpAmp -> PO

So if i change LPF to better opamp, PO sound will improve. right?

[fgfgfg]

So if i change LPF to better opamp, PO sound will improve. right?

yep