Hi out there
Do any of you know what the difference is between NE5532x opamps?
They may come from Signetics. Texas instruments or Philips.
I want to know how NE5532P is different from NE5532AN
I have been told that a provider called JRC has launched a 5532 without NE prefix that is compatible with NE5532X types.
What is the features of the JRC product as compared with the "originals".
I have understood that the JRC performs better in audio = HIFI equipment.
Do any of you know what the difference is between NE5532x opamps?
They may come from Signetics. Texas instruments or Philips.
I want to know how NE5532P is different from NE5532AN
I have been told that a provider called JRC has launched a 5532 without NE prefix that is compatible with NE5532X types.
What is the features of the JRC product as compared with the "originals".
I have understood that the JRC performs better in audio = HIFI equipment.
klitgt said:
The NE5532N is the standard version and the AN is a specially low noise premium version.
The NE5532P are not in the Philips /Signetics data sheet..
http://www.semiconductors.philips.com/acrobat_download/datasheets/NE_SE5532_A_SA5532_3.pdf
I have made a "null test" between a NE5532N from Signetics and a JRC 5532 and the NE win hands down.
Regards
Paul McGowan, of PS Audio fame (he even shows up sometimes), claims that only the Signetics version is worth anything.
Jocko
Jocko
Jocko Homo said:
For me , the only version that is close to the Signetics , is the TI version.
Regards
Tube Dude wrote:
The NE5532P are not in the Philips /Signetics data sheet..
The P version is a TI product. I have seen it myself.
It is in a circuit (2U-1435 "module", see diagram of details in a Denon cd machine DAC board. Input to NE5532 comes directly from IV converter. IC106 pin 7 goes directly to the out RCA socket. IC106 is btw also NE5532P).
I am trying to find out (also in another string) whether there might be an improvement to get by replacing the NE5532Ps in the 2U-1435 circuits and the IC106 (and IC146 for the other ch) by AD825 based opamp modules.
I can tell that replacing the IC106 (and corresponding for the other channel) by AD825 based opamp modules gives a better, more fine grained sound.
Apparently the NE5532 in the 2U-1435 circuits serve another purpose than the IC106 and I wonder whether they should be different from the opamps in the IC106 position.
I know that they could be single versions of any corresponding opamp, but that would require changing of the pin positions. It is easier just to replace by another double opamp.
The NE5532P are not in the Philips /Signetics data sheet..
The P version is a TI product. I have seen it myself.
It is in a circuit (2U-1435 "module", see diagram of details in a Denon cd machine DAC board. Input to NE5532 comes directly from IV converter. IC106 pin 7 goes directly to the out RCA socket. IC106 is btw also NE5532P).
I am trying to find out (also in another string) whether there might be an improvement to get by replacing the NE5532Ps in the 2U-1435 circuits and the IC106 (and IC146 for the other ch) by AD825 based opamp modules.
I can tell that replacing the IC106 (and corresponding for the other channel) by AD825 based opamp modules gives a better, more fine grained sound.
Apparently the NE5532 in the 2U-1435 circuits serve another purpose than the IC106 and I wonder whether they should be different from the opamps in the IC106 position.
I know that they could be single versions of any corresponding opamp, but that would require changing of the pin positions. It is easier just to replace by another double opamp.
I am new to DIY Mods to cd players. I want to upgrade all of my collection of Denon cd players:
DCD-1420
DCD-1500II
DCD-1520
DCD-1560
DCD-2560
DCD-1700
DCD-3300
DCD-3520
and a few Nakamichi CD-4 players.
So for starts, which opamp should I start with?
OP275, OPA627, or others?
DCD-1420
DCD-1500II
DCD-1520
DCD-1560
DCD-2560
DCD-1700
DCD-3300
DCD-3520
and a few Nakamichi CD-4 players.
So for starts, which opamp should I start with?
OP275, OPA627, or others?
Hi Klitgt
I have been studying one Denon 2U-1435 module and it seems to me it´s purpose is a unity gain low pass filter. Am I correct ?
The little sub board marked 2U-1435 in post #6 is just a buffer... the LPF is the LC network below driven via a constant 6K8 source impedance (R702/752).
This is a very old thread, klitgt hasn't been on here for nearly 12 months 🙂
This is a very old thread, klitgt hasn't been on here for nearly 12 months 🙂
Thank you Mooly
I have one of those boards and I was wondering if I could use it as a buffer.... You just cleared it out.
So it is a Voltage follower right ?
I have one of those boards and I was wondering if I could use it as a buffer.... You just cleared it out.
So it is a Voltage follower right ?
Remember if you AC couple the input then you will need a suitable resistor to zero volts on a split supply or a Vcc/2 reference if used on a single rail.
Hi Mooly
In the last case, of the single rail, we can't forget a output capacitor too.. 😉
I am modifying the resistor values so I can have 10dB gain. I will also use LM4562 opamps instead of the NE5532P.
I am going to use a +15v - 0 - -15v PSU and I know I can avoid the output cap this way.
I do not know why should I use an input cap ...
I am going to use a +15v - 0 - -15v PSU and I know I can avoid the output cap this way.
I do not know why should I use an input cap ...
😉 Just keeping you on your toes.
You need to do more than modify the resistors, you need to add one. You should also think about a cap in the feedback return too.
An input cap ensures the opamp doesn't amplify any DC offset from a previous stage.
Yes, I need one resistor from the inverting input to gnd so to form a voltage divider than provides the difference from the input in order to get some gain. I just need to know the best values... can you suggest those ?
I am not sure how to determine the feedback cap values also... would you point me some good readings?
As for the input cap, my sources already have output caps so I can leave them out.
I do not know if the LM4562 is a fet input opamp but I already have one in my actual preamp and it does not have an output cap and I have no output DC.
I am not sure how to determine the feedback cap values also... would you point me some good readings?
As for the input cap, my sources already have output caps so I can leave them out.
I do not know if the LM4562 is a fet input opamp but I already have one in my actual preamp and it does not have an output cap and I have no output DC.
10db gain is approximately a voltage gain of 3.5.
You could get that with a 10K and 3K9 resistor (actual gain 3.56). That's 11db which is close enough using preferred values.
The cap would need to be around 10uF which would give a -3db point of around 4hz.
The LM4562 is not fet but bjt and is considered the modern "replacement" for the 5532. The DC offset/input bias current is much improved over the 5532.
You could get that with a 10K and 3K9 resistor (actual gain 3.56). That's 11db which is close enough using preferred values.
The cap would need to be around 10uF which would give a -3db point of around 4hz.
The LM4562 is not fet but bjt and is considered the modern "replacement" for the 5532. The DC offset/input bias current is much improved over the 5532.
Wow... 10uF feedback cap. it will be a very large MKP.
Why such a big cap ?
In the meridian 101 preamp I have a very small cap in that placement (some picofarads).
Why such a big cap ?
In the meridian 101 preamp I have a very small cap in that placement (some picofarads).
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