Re: Alternative to NE5532n
Phil Allison
"Marc Amsterdam"
> Im looking to an alternative to the Philips-NXP NE5532n
> preferrably the Analog divice brand.
> Ive tried the NE5532AP *texas intruments( so far but they lack
> headroom. Anyone any thoughts_
** Yep - you need to get into rehab ASAP.
Mind altering drugs are a devastating social evil.
Cos they fuck with your head - somefin' serious.
..... Phil
bob urz
> Hi
> Im looking to an alternative to the Philips-NXP NE5532n
> preferrably the Analog divice brand.
> Ive tried the NE5532AP *texas intruments( so far but they lack
> headroom. Anyone any thoughts_
>
>
>
> Marc
what does like headroom mean?
is this for replacement or a from scratch project?
bob
George's Pro Sound Co.
Headroom is the space between the steering wheel and my lap :-0
ba da boom
George
bob urz
special guests on board???
bob
Arny Krueger
news:k7fvg51m6qcoh8p9u...@4ax.com
> Hi
>
> Im looking to an alternative to the Philips-NXP NE5532n
> preferrably the Analog divice brand.
> Ive tried the NE5532AP *texas intruments( so far but they
> lack headroom. Anyone any thoughts_
Tell us about the application.
In normal audio circuits, the headroom is set by the power supply voltages
and gain staging. Neither of those are changed when you change out good op
amps. NE5532 are good op amps - a classic and still widely used despite
their age.
<relishing the fact that Marc being a good Phildoite probably has me
killfiled and/or will grant me no credibilty, and thus will shoot himself in
the foot by ignoring this really helpful post>
Arny Krueger
> the aplication is an XTA DP226 which had its OPamps blown
> by some ignorant stupid git. who managed to put RS485
> through a DMX repeater and in the outputs of the XTA. the
> NE5532n dont like that.
DMX which is essentially RS 422 is not a good thing for most line level
outputs. Neither is mic + phantom.
But you already knew that!
> The xta techdept is sendin some NE5532n over, for the
> time being i use the Ti NE5532ap but they do lack
> headroom in given application though the specs do not
> differ......
Details. please. Which spec do you see as being a problem?
> I was wondering if anyone had experience putting
> different brands opamps to use as they all seem to have
> the same specs but turn out to be quite different.
I've done a ton of scientific expermentation related to that issue, both
listening tests and bench tests, and it doesn't bear out many anecdotes that
one hears.
> to validate the question
> the NXPphilips ones are becoming a hard to source item
> here.
Philips sold off their semiconductor business recently. That may have some
impact on availability.
Le...@nospam.com
>
>I was wondering if anyone had experience putting different brands
>opamps to use as they all seem to have the same specs but turn out to
>be quite different.
>
I can't tell you about 5532's but I can relate stories about other op amps...
One that comes to mind is the 739, which was used in mic and phono pre amps. One
type that I had was quite stable, but replacements from another company were
unstable in the same circuit, oscillated like crazy... Since I couldn't find the
original types, I scrapped the mixer. (I found out later there were internal end
external comp. types available.)
Another slightly different problem I had concerned TI op amps, I forget the
number but they were FET input, 8p DIPs... very popular in the late 70s or early
80s, and the ones from TI tended to BREAK into pieces when their leads were
flexed to fit into the sockets! I lost a whole bag of them that way! I ended up
using non-FET replacements from another company... s' weird...
So my conclusion is, NOT all op amps are the same, even if they have the same
part no. Just check out the spec sheet, most parameters have ranges, you hope
you get a center spread but you can be unlucky!
As far as your headroom problem, you must have a circuit with very tight
specs... you aren't meeting the drive requirements or something... can you get a
schematic? Did you check your power supply for any voltage droop? Maybe those
ops are drawing power, or even oscillating!
Phil Allison
<Le...@nospam.com>
" Marc Amsterdam "
> I can't tell you about 5532's but I can relate stories about other op
> amps...
** Here we go off into la la land.
> One that comes to mind is the 739, which was used in mic and phono pre
> amps.
** Back in the 1970s.
> One
> type that I had was quite stable, but replacements from another company
> were
> unstable in the same circuit, oscillated like crazy... Since I couldn't
> find the
> original types, I scrapped the mixer. (I found out later there were
> internal end
> external comp. types available.)
** Fairchild made the uA739 - which needed external R + C compensation.
Raytheon later made the RC4739 - which, while pin compatible with the
uA739, is of quite different design.
Pays to read the numbers and have a glance at the data sheets to.
> Another slightly different problem I had concerned TI op amps, I forget
> the
> number but they were FET input, 8p DIPs... very popular in the late 70s or
> early
> 80s, and the ones from TI tended to BREAK into pieces when their leads
> were
> flexed to fit into the sockets! I lost a whole bag of them that way! I
> ended up
> using non-FET replacements from another company... s' weird...
** Faulty metal - you should have returned them.
> So my conclusion is, NOT all op amps are the same, even if they have the
> same
> part no.
** Shame your examples do not even back that up.
> Just check out the spec sheet,
** Just like you did not.
> As far as your headroom problem,
** Marc has a headroom problem - alright.
His swollen head to too big for his hat.
.... Phil
Phildo
"George's Pro Sound Co." <bm...@yahoo.com> wrote in message
news:oKmdndgLdcniTZLW...@earthlink.com...
>> what does like headroom mean?
>
> Headroom is the space between the steering wheel and my lap :-0
> ba da boom
Nah, it's what Arny has between his ears - lots of empty space.
Ba-da-boom *tish*
Phildo
Phildo
"Arny Krueger" <ar...@hotpop.com> wrote in message
news:ZOWdnehAM7JJSZLW...@giganews.com...
> <relishing the fact that Marc being a good Phildoite probably has me
> killfiled and/or will grant me no credibilty, and thus will shoot himself
> in the foot by ignoring this really helpful post>
Being ignored by the vast majority of people on here, even on the rare
occasions you actually have something useful to say, is the price you pay
for being such an idiot. You bring it all on yourself but are too much of a
coward to accept any sort of responsibility so try to blame everything on
other people.
Phildo
Le...@nospam.com
>
><Le...@nospam.com>
> " Marc Amsterdam "
>
>> I can't tell you about 5532's but I can relate stories about other op
>> amps...
>
>** Here we go off into la la land.
>
Really? If you say so... but go by yourself, pal.
>> One that comes to mind is the 739, which was used in mic and phono pre
>> amps.
>
>** Back in the 1970s.
I said that... you snipped it...
>
>> One
>> type that I had was quite stable, but replacements from another company
>> were
>> unstable in the same circuit, oscillated like crazy... Since I couldn't
>> find the
>> original types, I scrapped the mixer. (I found out later there were
>> internal end
>> external comp. types available.)
>
>** Fairchild made the uA739 - which needed external R + C compensation.
>
>Raytheon later made the RC4739 - which, while pin compatible with the
>uA739, is of quite different design.
>
>Pays to read the numbers and have a glance at the data sheets to.
>
Didn't have spec sheets at the time, was given "739" chips by the boss. I found
out later, as I said.
>
>> Another slightly different problem I had concerned TI op amps, I forget
>> the
>> number but they were FET input, 8p DIPs... very popular in the late 70s or
>> early
>> 80s, and the ones from TI tended to BREAK into pieces when their leads
>> were
>> flexed to fit into the sockets! I lost a whole bag of them that way! I
>> ended up
>> using non-FET replacements from another company... s' weird...
>
>** Faulty metal - you should have returned them.
They were DIFFERENT!
>> So my conclusion is, NOT all op amps are the same, even if they have the
>> same
>> part no.
>
>** Shame your examples do not even back that up.
Learn to read... but it doesn't matter, op amps have a spread of parameters, you
just ignore it.
>> Just check out the spec sheet,
>
>** Just like you did not.
Not applicable, I checked the data later... perhaps the OP did the same...
>> As far as your headroom problem,
>
>
>** Marc has a headroom problem - alright.
>
> His swollen head to too big for his hat.
>
HA!!! You talk about swollen heads??!! The Koreans have to wait for you to lie
down before they shoot a missle over Oz!!!
Phil Allison
<Le...@nospam.com>
> " Marc Amsterdam "
>>
>>> I can't tell you about 5532's but I can relate stories about other op
>>> amps...
>>
>>** Here we go off into la la land.
>>
>
> Really? If you say so... but go by yourself, pal.
** Leon is the lunatic crown prince of la la land.
>>> One that comes to mind is the 739, which was used in mic and phono pre
>>> amps.
>>
>>** Back in the 1970s.
>
> I said that...
** No you did not, you damn LIAR.
> Didn't have spec sheets at the time, was given "739" chips by the boss. I
> found
> out later, as I said.
** Shame what you "found out " was not correct.
>>** Faulty metal - you should have returned them.
>
> They were DIFFERENT!
** Totally off with the pixies and goblins.
A complete fuckwit.
>>> So my conclusion is, NOT all op amps are the same, even if they have the
>>> same part no.
>>
>>** Shame your examples do not even back that up.
>
> Learn to read...
** Jesus H. Christ - you are one, king size wanking idiot !!
>>> Just check out the spec sheet,
>>
>>** Just like you did not.
>
> Not applicable, I checked the data later
** It IS applicable to YOU !!!
And you still did not get the facts right.
Piss OFF and DROP DEAD
.. Phil
Tim Perry
"Marc Amsterdam" <re...@newsgroup.only> wrote in message
> Hi
>
> Im looking to an alternative to the Philips-NXP NE5532n
> preferrably the Analog divice brand.
> Ive tried the NE5532AP *texas intruments( so far but they lack
> headroom. Anyone any thoughts_
>
>
>
> Marc
try a burr-brown opa2134
geoff
>
> As far as your headroom problem, you must have a circuit with very
> tight specs... you aren't meeting the drive requirements or
> something... can you get a schematic? Did you check your power supply
> for any voltage droop? Maybe those ops are drawing power, or even
> oscillating!
Yes, the 'headroom' ascertion seems a bit odd to me too.
It would be nice to know exactly how this apparent failing actually
manifests.
geoff
Phil Allison
"geoff" <ge...@nospam-paf.co.nz>
>
> Yes, the 'headroom' ascertion seems a bit odd to me too.
>
> It would be nice to know exactly how this apparent failing actually
> manifests.
** The XTA DP226 displays a parameter called "Headroom".
Obviously allows one to tell immediately if a new input IC is up to scratch
or not .....
.... Phil
geoff
Not from what I read. - it's not some sort of internal self-test of levels
at all.
From the descriptions of the various instances of 'headroom' in the manual,
they are simply level indications/warnings wrt max unclipped output level.
But I only had time to skim the manual and as usual you are doubtlessly
right.
geoff
Phil Allison
"geoff"
> Phil Allison wrote:
>
>>>
>>> Yes, the 'headroom' ascertion seems a bit odd to me too.
>>>
>>> It would be nice to know exactly how this apparent failing actually
>>> manifests.
>>
>>
>> ** The XTA DP226 displays a parameter called "Headroom".
>>
>> Obviously allows one to tell immediately if a new input IC is up to
>> scratch or not .....
>
>
> Not from what I read.
** What do you think my " ..... " meant ????
> From the descriptions of the various instances of 'headroom' in the
> manual, they are simply level indications/warnings wrt max unclipped
> output level.
** Easy to misinterpret such display - is it not?
..... Phil
Arny Krueger
"geoff" <ge...@nospam-paf.co.nz> wrote in message
news:XNGdnWUIH55vgI7W...@giganews.com...
> Phil Allison wrote:
>> "geoff" <ge...@nospam-paf.co.nz>
>>
>>>
>>> Yes, the 'headroom' ascertion seems a bit odd to me too.
>>>
>>> It would be nice to know exactly how this apparent failing actually
>>> manifests.
>>
>>
>> ** The XTA DP226 displays a parameter called "Headroom".
>> Obviously allows one to tell immediately if a new input IC is up to
>> scratch or not .....
Not so much.
> Not from what I read. - it's not some sort of internal self-test of
> levels at all.
> From the descriptions of the various instances of 'headroom' in the
> manual, they are simply level indications/warnings wrt max unclipped
> output level.
> But I only had time to skim the manual and as usual you are doubtlessly
> right.
I found two mentions. They lead me to believe that they relate to unclipped
input level, which varies depending on how the built-in limiting is set.
No way do they indicate subtle aspects of op amp performance.
Phil Allison
"Arny Krueger"
> Phil Allison wrote:
>>
>>> ** The XTA DP226 displays a parameter called "Headroom".
>
>>> Obviously allows one to tell immediately if a new input IC is up to
>>> scratch or not .....
>
> Not so much.
** Shame to have to spell it out like this - but my use of " ..... "
after such an obviously facetious comment was intended to be humorous.
Should have been very apparent from reading my first reply to Marc in this
thread.
bob u
wheel. In some past life, i tried a lab experiment on the subject.
Luckily, no cars or humans were injured. A few brain cells might have
be a casualty though,,,,, ;)
bob
--- news://freenews.netfront.net/ - complaints: ne...@netfront.net ---
Denny Strauser
> On 11/27/2009 7:13 AM, George's Pro Sound Co. wrote:
>>> what does like headroom mean?
>>
>> Headroom is the space between the steering wheel and my lap :-0
>> ba da boom
>> George
> Its room for the female head that's between your lap and the steering
> wheel. In some past life, i tried a lab experiment on the subject.
>
> Luckily, no cars or humans were injured. A few brain cells might have
> be a casualty though,,,,, ;)
Just don't slam on the brakes or get in accident ... or something might
be lost in the translation ....
It pains me just to think about it .... OUCH!
-Denny