"Marky P" wrote in
message


Can't remember if any of these are op amps, but here are
the numbers:

LM382N

Low noise dual preamp.

http://pdf1.alldatasheet.co.kr/datas...SC/LM382N.html

LM380N

2.5 watt power amp

http://www.national.com/pf/LM/LM380.html

LM3482A

Precision Current Gauge IC with Internal Zero Ohm Sense Element and PWM
Output

http://www.national.com/mpf/LM/LM3824.html


LM741 (pretty sure this is an op amp)

Yup and a real oldie. Slow and noisy, not to mention power hungry and a
weak output for what it does.

http://www.national.com/mpf/LM/LM741.html


M5K4164ANP (ain't a bloody clue what this is)

http://www.alldatasheet.com/view.jsp...ord=M5K4164ANP

RAM chip.

TIP31A

Power transistor

http://www.onsemi.com/pub_link/Collateral/TIP31A-D.PDF

ZTX300 (a little 3 pin thing)

NPN signal transistor

http://www.datasheetcatalog.com/data...3/ZTX300.shtml

ZN414 (this is an FM radio on a 3 pin chip)

http://www.electronics-lab.com/projects/rf/008/


MJE2955

PNP complement to the MJE3055 which is a 2N3055 in a cheap plastic case.

http://www.onsemi.com/PowerSolutions...do?id=MJE2955T


BTW Marky, the trip down memory lane was fun for me, but have you ever heard
of google? ;-)

"Arny Krueger" wrote in message
...
BTW Marky, the trip down memory lane was fun for me, but have you ever
heard
of google? ;-)

Obviously not, or he just prefers others to do it for him, and you were
happy to oblige.

MrT.

On Fri, 17 Oct 2008 13:20:45 +1000, "Mr.T" MrT@home wrote:


"Arny Krueger" wrote in message
...
BTW Marky, the trip down memory lane was fun for me, but have you ever
heard
of google? ;-)

Obviously not, or he just prefers others to do it for him, and you were
happy to oblige.

MrT.

Never thought of googling them actually. I'm a bit slow in that
respect :-)


Marky P.

"Arny Krueger" wrote in message
...
"Marky P" wrote in
message

[...]

LM741 (pretty sure this is an op amp)

Yup and a real oldie. Slow and noisy, not to mention power hungry and a
weak output for what it does.

This was arguably the "breakthrough" IC op-amp. It was one of the first
popular devices that was actually a monolithic design, and not a hybrid like
some of the original Burr Brown modules. It was compensated for unity gain,
which made it much too slow for anything but a buffer for audio work. It had
a slew rate of 0.5 volts/microsecond. With a +/- 12 volt power supply, 6 kHz
rail-to-rail was about it for non-slew rate limited signals. You could get
20KHz through it if you were content with about 4 volts peak.

I think it had more applications in analog computing, integrators, low
frequency function generators, servo controls, etc.

Chronic Philharmonic wrote:

"Arny Krueger" wrote
"Marky P" wrote


LM741 (pretty sure this is an op amp)

Yup and a real oldie. Slow and noisy, not to mention power hungry and a
weak output for what it does.

This was arguably the "breakthrough" IC op-amp. It was one of the first
popular devices that was actually a monolithic design, and not a hybrid like
some of the original Burr Brown modules. It was compensated for unity gain,
which made it much too slow for anything but a buffer for audio work. It had
a slew rate of 0.5 volts/microsecond. With a +/- 12 volt power supply, 6 kHz
rail-to-rail was about it for non-slew rate limited signals. You could get
20KHz through it if you were content with about 4 volts peak.

I think it had more applications in analog computing, integrators, low
frequency function generators, servo controls, etc.

True but it DID get used in audio. Its companion, the 748 was uncompensated
internally (like the 5534 vs the 5532) and always seemed less noisy to me, so I
used quite a few of those.

Graham

In article , Eeyore wrote:


Chronic Philharmonic wrote:

"Arny Krueger" wrote
"Marky P" wrote


LM741 (pretty sure this is an op amp)

Yup and a real oldie. Slow and noisy, not to mention power hungry and a
weak output for what it does.

This was arguably the "breakthrough" IC op-amp. It was one of the first
popular devices that was actually a monolithic design, and not a hybrid like
some of the original Burr Brown modules. It was compensated for unity gain,
which made it much too slow for anything but a buffer for audio work. It had
a slew rate of 0.5 volts/microsecond. With a +/- 12 volt power supply, 6 kHz
rail-to-rail was about it for non-slew rate limited signals. You could get
20KHz through it if you were content with about 4 volts peak.

I think it had more applications in analog computing, integrators, low
frequency function generators, servo controls, etc.

True but it DID get used in audio. Its companion, the 748 was uncompensated
internally (like the 5534 vs the 5532) and always seemed less noisy to me, so I
used quite a few of those.

The RC4136 was used in a lot of stuff. It had a faster slew rate, and I measured
up to 1.8 v/us, and was called a quad 741. Weird pins too.

greg

GregS wrote:

Eeyore wrote:
Chronic Philharmonic wrote:
"Arny Krueger" wrote
"Marky P" wrote

LM741 (pretty sure this is an op amp)

Yup and a real oldie. Slow and noisy, not to mention power hungry and a
weak output for what it does.

This was arguably the "breakthrough" IC op-amp. It was one of the first
popular devices that was actually a monolithic design, and not a hybrid like
some of the original Burr Brown modules. It was compensated for unity gain,
which made it much too slow for anything but a buffer for audio work. It had
a slew rate of 0.5 volts/microsecond. With a +/- 12 volt power supply, 6 kHz
rail-to-rail was about it for non-slew rate limited signals. You could get
20KHz through it if you were content with about 4 volts peak.

I think it had more applications in analog computing, integrators, low
frequency function generators, servo controls, etc.

True but it DID get used in audio. Its companion, the 748 was uncompensated
internally (like the 5534 vs the 5532) and always seemed less noisy to me, so I
used quite a few of those.

The RC4136 was used in a lot of stuff. It had a faster slew rate, and I measured
up to 1.8 v/us, and was called a quad 741. Weird pins too.

I know the one. Avoided it like the plague if only for the pinout !

Didn't TI make a TL075 with the same pinout ?

Graham

In article , Eeyore wrote:


GregS wrote:

Eeyore wrote:
Chronic Philharmonic wrote:
"Arny Krueger" wrote
"Marky P" wrote

LM741 (pretty sure this is an op amp)

Yup and a real oldie. Slow and noisy, not to mention power hungry and a
weak output for what it does.

This was arguably the "breakthrough" IC op-amp. It was one of the first
popular devices that was actually a monolithic design, and not a hybrid
like
some of the original Burr Brown modules. It was compensated for unity
gain,
which made it much too slow for anything but a buffer for audio work. It
had
a slew rate of 0.5 volts/microsecond. With a +/- 12 volt power supply, 6
kHz
rail-to-rail was about it for non-slew rate limited signals. You could get
20KHz through it if you were content with about 4 volts peak.

I think it had more applications in analog computing, integrators, low
frequency function generators, servo controls, etc.

True but it DID get used in audio. Its companion, the 748 was uncompensated
internally (like the 5534 vs the 5532) and always seemed less noisy to me,
so I
used quite a few of those.

The RC4136 was used in a lot of stuff. It had a faster slew rate, and I
measured
up to 1.8 v/us, and was called a quad 741. Weird pins too.

I know the one. Avoided it like the plague if only for the pinout !

Didn't TI make a TL075 with the same pinout ?

Graham


Right, and I always wanted to use them in my old Soundcraftmen equalizer, then I could not get them.
I was set up to make conversion boards but never finished. I still have that equalizer but I don't use it.

greg

GregS wrote:

Eeyore wrote:
GregS wrote:

The RC4136 was used in a lot of stuff. It had a faster slew rate, and I
measured up to 1.8 v/us, and was called a quad 741. Weird pins too.

I know the one. Avoided it like the plague if only for the pinout !

Didn't TI make a TL075 with the same pinout ?

Right, and I always wanted to use them in my old Soundcraftmen equalizer, then I could not get them.
I was set up to make conversion boards but never finished. I still have that equalizer but I don't use it.

TI have now deleted it. Little demand I suppose. I only know because I have a very early copy of the bifet
manual.

Graham

"Eeyore" wrote in
message
Chronic Philharmonic wrote:

"Arny Krueger" wrote
"Marky P" wrote


LM741 (pretty sure this is an op amp)

Yup and a real oldie. Slow and noisy, not to mention
power hungry and a weak output for what it does.

This was arguably the "breakthrough" IC op-amp. It was
one of the first popular devices that was actually a
monolithic design, and not a hybrid like some of the
original Burr Brown modules. It was compensated for
unity gain, which made it much too slow for anything but
a buffer for audio work. It had a slew rate of 0.5
volts/microsecond. With a +/- 12 volt power supply, 6
kHz rail-to-rail was about it for non-slew rate limited
signals. You could get 20KHz through it if you were
content with about 4 volts peak.

I think it had more applications in analog computing,
integrators, low frequency function generators, servo
controls, etc.

True but it DID get used in audio. Its companion, the 748
was uncompensated internally (like the 5534 vs the 5532)
and always seemed less noisy to me, so I used quite a few
of those.

The on-chip compensation cap for the 741 was a well-known source of noise.

LM301s were another alternative once the market matured some more.

I believe that the integrated preamp/crossover for the original Infinity
Servo-Static system used 741s.

As others have pointed out, their slew-rate limitations were not that bad if
you were running them at usual consumer levels like 1.5 volts RMS.