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[#1] Opamp 升級直接替代品    
非常感謝 if any high-hand can tell me information about the replacement of the following Op-amps in order to have better sonic performance.

1) BB (Burr brown) OPA2604AP 9912 9043

2) SSM2017 916 G21010 0
aud
個人訊息 會員
14.xxx.xxx.65
2013-05-21 18:55
[#2] Opamp 升級直接替代品    
請問2604後的英文字母”AP”也有级别之分?
aud
個人訊息 會員
14.xxx.xxx.114
2013-05-22 09:01
[#3] Opamp 升級直接替代品    
OPA通常有如下的grades : SM>BM>AM>BP>AP。
TrotanoyLover
個人訊息 會員
210.xxx.xxx.224
2013-05-22 09:59
[#4] Opamp 升級直接替代品    
"""..SM>BM>AM>BP>AP。 前三者是 in metallic cans 而後兩者是 plastic coating..."""
http://www.hiendy.com/hififorum/forum.php?mod=viewthread&tid=27231&extra=&page=4
cornercube
個人訊息 會員
58.xxx.xxx.102
2013-05-22 10:35
[#5] Opamp 升級直接替代品    
To upgrade from OPA2604, can try :

Modest price : LM4562, LME49720
Expensive ones : OPA627BM [$3xx/single piece] or OPA627SM [$6xx/pc]. Need converter PCB to make a pair to fit into DIP8 socket for each 2604.
Discrete opamps : Dexa/NewClassD dual about USD7x/pc.

If space permits, Dexa is even better than the OPA627BM which I also used before.

最後修改時間: 2013-05-22 10:53:55
diwily
個人訊息 會員
203.xxx.xxx.174
2013-05-22 10:47
[#6] Opamp 升級直接替代品    
非常感謝Diwily 兄!
aud
個人訊息 會員
14.xxx.xxx.114
2013-05-22 11:42
[#7] Opamp 升級直接替代品    
請問用 discrete opamp 是否一代一ok, 不用加別的东西?

另外item 2 是否opamp IC?
可升級吗?
aud
個人訊息 會員
14.xxx.xxx.114
2013-05-22 11:50
[#8] Opamp 升級直接替代品    
>>>..discrete opamp 是否一代一ok
-----------------------------------------
It depends:

(1)腳位?
(2)電壓?
(3)單運放vs雙運放?
(4)外置件配合?
(5)體積/空間?

cornercube
個人訊息 會員
58.xxx.xxx.102
2013-05-22 12:21
[#9] Opamp 升級直接替代品    
請問用 discrete opamp 是否一代一ok, 不用加別的东西? Yes, NewClassD fits many opamps without any change to socket pin configuration or change to circuits.
You have to copy & paste the links.
Link to NewClassD from Denmark:
"http://www.newclassd.com/index.php?page=55"

Link to another discrete opamp Burson form Australia:
"http://bursonaudio.com/DIY_HD_Opamp.htm"

Note that Burson draws higher current than others.

另外item 2 是否opamp IC? Yes.
可升級吗? Discrete opamp is the best grade of opamp, much better than IC. You may search in the web.

Pls check PM.

最後修改時間: 2013-05-22 13:35:59
diwily
個人訊息 會員
203.xxx.xxx.174
2013-05-22 13:32
[#10] Opamp 升級直接替代品    
Here is the photo! Any more comments please.

aud
個人訊息 會員
118.xxx.xxx.5
2013-05-22 13:51
[#11] Opamp 升級直接替代品    
SSM2017 replacement suggestion

http://blog.audioworkshop.org/ssm2017-line-preamplifier-high-quality-design/#.UZxjTZyTsgQ
Esquire
個人訊息 會員
158.xxx.xxx.187
2013-05-22 14:19
[#12] Opamp 升級直接替代品    
師兄:
INA219 代替 SSM2017 的 config 一樣,直接換就ok?
此IC 高级過SSM2022 好多? 多少錢?

感謝!
aud
個人訊息 會員
14.xxx.xxx.114
2013-05-22 16:30
[#13] Opamp 升級直接替代品    
Looking more carefully, the 3 pcs opamps are of DIP8 configuration, but they look like being soldered. There seem to be no socket on the PCB. You may double check.
diwily
個人訊息 會員
203.xxx.xxx.174
2013-05-22 18:15
[#14] Opamp 升級直接替代品    
Low-Noise, Low-Distortion
INSTRUMENTATION AMPLIFIER
Replacement for SSM2017

http://hk.element14.com/texas-instruments/ina217aip/ic-amp-instrumentation-pdip8-217/dp/1212423

最後修改時間: 2013-05-22 18:27:20
Esquire
個人訊息 會員
158.xxx.xxx.187
2013-05-22 18:26
[#15] Opamp 升級直接替代品    
Do not know if it outdated??

"""As SSM2017 is a device/amplifer with very good caractaristics
it is hard to recommend anything better."""


http://www.audioasylum.com/cgi/t.mpl?f=tweaks&m=53045

http://tangentsoft.net/audio/opamps.html


http://sound.westhost.com/dwopa.htm
cornercube
個人訊息 會員
58.xxx.xxx.102
2013-05-22 18:30
[#16] Opamp 升級直接替代品    
Thank you very much for esquire and cornercube 师兄的意見!

我知原裝粒IC outdated 左。

INA217 should be superior to it?

唔贵! 可試吓!
aud
個人訊息 會員
14.xxx.xxx.114
2013-05-22 20:04
[#17] Opamp 升級直接替代品    
I mean to say:
粒原裝IC依然靚聲,
即使條‎thread已經超過10‎年.
cornercube
個人訊息 會員
58.xxx.xxx.118
2013-05-23 07:56
[#18] Opamp 升級直接替代品    
So, i don't know if INA217 is just a replacement because of outdated chip or it is a upgrading.
aud
個人訊息 會員
14.xxx.xxx.101
2013-05-23 08:22
[#19] Opamp 升級直接替代品    
I think 217 is just a replacement for 2017, not a upgrading.

cornercube
個人訊息 會員
58.xxx.xxx.118
2013-05-23 08:58
[#20] Opamp 升級直接替代品    
但從失真率看 INA217 = 0.004%, 而 SSM2017 < 0.01%。
我是行外人,所以唔識分!

多謝 cornertube 兄先!
aud
個人訊息 會員
14.xxx.xxx.102
2013-05-23 12:16
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