| View previous topic :: View next topic |
| Author |
Message |
Comm1 via ElectronicsKB.c
Guest
|
 Posted: Mon Jul 21, 2008 10:26 pm Post subject: Source for new old stock or pulled LM741CN Op Amps |
 |
|
I am looking for a few LM741CN chips made in the 1970>s. Does anyone know of
a source for new old stock or any old equipment that used them that can be
obtained cheap to remove them from?
Thanks!
--
Message posted via ElectronicsKB.com
http://www.electronicskb.com/Uwe/Forums.aspx/electronics-general/200807/1 |
|
| |
|
 Back to top |
Eeyore
Guest
|
| Posted: Mon Jul 21, 2008 10:44 pm Post subject: Re: Source for new old stock or pulled LM741CN Op Amps |
|
|
"Comm1 via ElectronicsKB.com" wrote:
[quote]I am looking for a few LM741CN chips made in the 1970>s. Does anyone know of
a source for new old stock or any old equipment that used them that can be
obtained cheap to remove them from?
[/quote]
I hate to ask why you>d want them.
It would be a lot easier to get something more modern.
Graham |
|
| |
|
| Back to top |
Michael Black
Guest
|
| Posted: Mon Jul 21, 2008 11:25 pm Post subject: Re: Source for new old stock or pulled LM741CN Op Amps |
|
|
On Mon, 21 Jul 2008, Comm1 via ElectronicsKB.com wrote:
[quote]I am looking for a few LM741CN chips made in the 1970>s. Does anyone know of
a source for new old stock or any old equipment that used them that can be
obtained cheap to remove them from?
Huh?[/quote]
If you can>t buy 741>s that are new now, you could up to a fairly recent
time. They weren>t even new in the seventies, but as mediocre as they
were they had a really long staying power.
So the question that really needs answering is if you realize the op-amp
has had a really long life, or if you for some reason think an op-amp
made in a specific time period has some golden factor to it that is
necessary for some specific application.
Any 741 should work. ANd likely many general purpose op-amps that
have come later will work fine too, unless the circuit is something
terribly exotic that relies on some quirk of the 741.
Michael |
|
| |
|
| Back to top |
webpa
Guest
|
| Posted: Mon Jul 21, 2008 11:42 pm Post subject: Re: Source for new old stock or pulled LM741CN Op Amps |
|
|
On Jul 21, 11:26 am, "Comm1 via ElectronicsKB.com" <u44935@uwe> wrote:
[quote]I am looking for a few LM741CN chips made in the 1970>s. Does anyone know of
a source for new old stock or any old equipment that used them that can be
obtained cheap to remove them from?
Thanks!
--
Message posted via ElectronicsKB.comhttp://www.electronicskb.com/Uwe/Forums.aspx/electronics-general/2008...
[/quote]
You>ve had several replies questioning your motives and intelligence.
They obviously don>t have any experience with maintaining military or
"certified" civil (usually avionics...but includes elevator
controllers, medical equipment, etc.) equipment. I>m sorry I can>t
help you, but keep trying. Its out there somewhere. |
|
| |
|
| Back to top |
DaveM
Guest
|
| Posted: Tue Jul 22, 2008 3:36 am Post subject: Re: Source for new old stock or pulled LM741CN Op Amps |
|
|
"Michael Black" <et472@ncf.ca> wrote in message
news:Pine.LNX.4.64.0807211422490.20381@darkstar.example.org...
[quote]On Mon, 21 Jul 2008, Comm1 via ElectronicsKB.com wrote:
I am looking for a few LM741CN chips made in the 1970>s. Does anyone know of
a source for new old stock or any old equipment that used them that can be
obtained cheap to remove them from?
Huh?
If you can>t buy 741>s that are new now, you could up to a fairly recent time.
They weren>t even new in the seventies, but as mediocre as they
were they had a really long staying power.
So the question that really needs answering is if you realize the op-amp
has had a really long life, or if you for some reason think an op-amp
made in a specific time period has some golden factor to it that is necessary
for some specific application.
Any 741 should work. ANd likely many general purpose op-amps that
have come later will work fine too, unless the circuit is something
terribly exotic that relies on some quirk of the 741.
Michael
[/quote]
Why bother with buying old equipment that might or might not have the quantity
of ICs that you need? And you>re forced to pay freight on the entire mass of
the equipment, which is almost guaranteed to hit your checking account pretty
hard.
You can still buy new from many sources, including major distributors (Mouser,
Digikey, etc.). http://www.unicornelectronics.com/IC/LINEAR.html probably has
the best price at $0.21 each (USD) plus S/H. Cheaper if you buy 25 or more.
($20 minimum though)
--
Dave M
MasonDG44 at comcast dot net (Just substitute the appropriate characters in the
address)
Experience: What you get when you don>t get what you want |
|
| |
|
| Back to top |
Comm1 via ElectronicsKB.c
Guest
|
| Posted: Tue Jul 22, 2008 5:49 am Post subject: Re: Source for new old stock or pulled LM741CN Op Amps |
|
|
Allow me to explain why I want an old 741 Op Amp. I am fully aware of the
"improvements" made since the old 741 Op Amp of the 1970>s. (First released
in 1968.) Here is something you may not be aware of.
It is for an old overdrive pedal for an electric guitar. The new improved 741
Op Amps don>t give the pedal the same tone as the older ones. Overdrive is
used for distortion and nothing, outside of tubes, distorts like the old
1970>s 741 Op Amps in one of these pedals.
Thanks
--
Message posted via ElectronicsKB.com
http://www.electronicskb.com/Uwe/Forums.aspx/electronics-general/200807/1 |
|
| |
|
| Back to top |
Michael A. Terrell
Guest
|
| Posted: Tue Jul 22, 2008 5:57 am Post subject: Re: Source for new old stock or pulled LM741CN Op Amps |
|
|
"Comm1 via ElectronicsKB.com" wrote:
[quote]
I am looking for a few LM741CN chips made in the 1970>s. Does anyone know of
a source for new old stock or any old equipment that used them that can be
obtained cheap to remove them from?
[/quote]
I found them the first place I looked:
<http://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?langId=-1&storeId=10001&catalogId=10001&productId=840763>
<http://www.jameco.com/Jameco/catalogs/c283/P19.pdf>
Jameco P/N 840763
Mfg NATIONAL SEMICONDUCTOR
Mfg # LM741CN/NOPB
# of Units $US EA
1+ 0.82
10+ 0.60
100+ 0.43
--
http://improve-usenet.org/index.html
If you have broadband, your ISP may have a NNTP news server included in
your account: http://www.usenettools.net/ISP.htm
Sporadic E is the Earth>s aluminum foil beanie for the 'global warming'
sheep. |
|
| |
|
| Back to top |
Comm1 via ElectronicsKB.c
Guest
|
| Posted: Tue Jul 22, 2008 6:17 am Post subject: Re: Source for new old stock or pulled LM741CN Op Amps |
|
|
Thanks for the input. :-)
webpa wrote:
[quote]I am looking for a few LM741CN chips made in the 1970>s. Does anyone know of
a source for new old stock or any old equipment that used them that can be
[quoted text clipped - 4 lines]
--
Message posted via ElectronicsKB.comhttp://www.electronicskb.com/Uwe/Forums.aspx/electronics-general/2008...
You>ve had several replies questioning your motives and intelligence.
They obviously don>t have any experience with maintaining military or
"certified" civil (usually avionics...but includes elevator
controllers, medical equipment, etc.) equipment. I>m sorry I can>t
help you, but keep trying. Its out there somewhere.
[/quote]
--
Message posted via ElectronicsKB.com
http://www.electronicskb.com/Uwe/Forums.aspx/electronics-general/200807/1 |
|
| |
|
| Back to top |
Comm1 via ElectronicsKB.c
Guest
|
| Posted: Tue Jul 22, 2008 6:18 am Post subject: Re: Source for new old stock or pulled LM741CN Op Amps |
|
|
Thanks for the link, but I am looking for new old stock left over or pulled
from equipment made in the 1970>s.
Michael A. Terrell wrote:
[quote]I am looking for a few LM741CN chips made in the 1970>s. Does anyone know of
a source for new old stock or any old equipment that used them that can be
obtained cheap to remove them from?
I found them the first place I looked:
http://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?langId=-1&storeId=10001&catalogId=10001&productId=840763
http://www.jameco.com/Jameco/catalogs/c283/P19.pdf
Jameco P/N 840763
Mfg NATIONAL SEMICONDUCTOR
Mfg # LM741CN/NOPB
# of Units $US EA
1+ 0.82
10+ 0.60
100+ 0.43
[/quote]
--
Message posted via http://www.electronicskb.com |
|
| |
|
| Back to top |
Michael A. Terrell
Guest
|
| Posted: Tue Jul 22, 2008 6:46 am Post subject: Re: Source for new old stock or pulled LM741CN Op Amps |
|
|
"Comm1 via ElectronicsKB.com" wrote:
[quote]
Thanks for the link, but I am looking for new old stock left over or pulled
from equipment made in the 1970>s.
[/quote]
You should have explained that in your first message. Do you need
the 8 pin plastic dip? If you are in the US, I could probably dig up
some from scrapped boards.
--
http://improve-usenet.org/index.html
If you have broadband, your ISP may have a NNTP news server included in
your account: http://www.usenettools.net/ISP.htm
Sporadic E is the Earth>s aluminum foil beanie for the 'global warming'
sheep. |
|
| |
|
| Back to top |
Dan Coby
Guest
|
| Posted: Tue Jul 22, 2008 7:04 am Post subject: Re: Source for new old stock or pulled LM741CN Op Amps |
|
|
"Comm1 via ElectronicsKB.com" <u44935@uwe> wrote in message news:877d11e8d9f83@uwe...
[quote]I am looking for a few LM741CN chips made in the 1970>s. Does anyone know of
a source for new old stock or any old equipment that used them that can be
obtained cheap to remove them from?
Thanks!
[/quote]
I have 9 LM741CN that I found in one of my parts cabinets. I am pretty sure that they are
at least 20 years old. You are welcome to them. Send me and address. |
|
| |
|
| Back to top |
|
