Obsolete parts

Neil Groves · 14th November 2011, 07:57 PM

I am having some problems obtaining parts for projects mainly i think because i am building from schematics that are years old, typically 1980's, does anyone have any good suppliers for these kind of parts, mainly I.C's?

LM3900
CA3080
LM3403

When i do find a stockist they usually want a minimum order such as $75 which makes it an expensive investment, else they have a minimum order of 100 or 500, obviously way too many for my needs.

Also i need a supplier that would stock all the I.C's i listed above so i don't have to pay postage for 3 seperate orders from various companies, any help would be appreciated.

How do you guys go on about obtaining obsolete parts?

Neil.

dchisholm · 14th November 2011, 11:42 PM

LM3900: TI seems to be still manufacturing this IC. Digikey reports stock on hand.

CA3080: I think the only inexpensive OTA still in production is the National LM13700. It's a dual, so you'll have to redo the PWB, or rig some kind of adapter. Digikey reports stock on-hand.

LM3403: I'm not sure what advantage this part really has over an LM324 . . . and a TL074 should outperform it in most applications.

Dale

indianajo · 15th November 2011, 12:27 AM

Your local Peavey sound equipment dealer might have CA3080, they call it 70413080. don't be surprised if it comes in 13080 from Harris semiconductor.

Enzo · 15th November 2011, 02:50 AM

And at Mouser:
15,000 LM3900 in stock at 50 cents each. 33 cents each if you buy 25 or more.

Zero Cool · 15th November 2011, 03:02 AM

jameco sells CA3080's

DF96 · 15th November 2011, 10:47 AM

In the UK Cricklewood Electronics are good for obsolete chips.

Neil Groves · 15th November 2011, 02:27 PM

Thanks guys, i'll go take a look.

Neil.

14th November 2011, 07:57 PM	#1
Neil Groves diyAudio Member Join Date: Sep 2011 Location: Near San Francisco	Obsolete parts I am having some problems obtaining parts for projects mainly i think because i am building from schematics that are years old, typically 1980's, does anyone have any good suppliers for these kind of parts, mainly I.C's? LM3900 CA3080 LM3403 When i do find a stockist they usually want a minimum order such as $75 which makes it an expensive investment, else they have a minimum order of 100 or 500, obviously way too many for my needs. Also i need a supplier that would stock all the I.C's i listed above so i don't have to pay postage for 3 seperate orders from various companies, any help would be appreciated. How do you guys go on about obtaining obsolete parts? Neil.

15th November 2011, 12:27 AM	#3
indianajo diyAudio Member Join Date: Jan 2010 Location: Jeffersonville, Indiana USA	Your local Peavey sound equipment dealer might have CA3080, they call it 70413080. don't be surprised if it comes in 13080 from Harris semiconductor. __________________ Dynakit ST70, ST120, PAS2,Hammond H182(2 ea),H112,A100,10-82TC,Peavey CS800S,SP2-XT's, T-300 HF Projs, Steinway console, Herald RA88a mixer, Wurlitzer 4500

15th November 2011, 03:02 AM	#5
Zero Cool Audio Junkie diyAudio Member Join Date: Sep 2004 Location: MN	jameco sells CA3080's __________________ It's not about what you can BUY...It's about what you can BUILD!

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Lots of obsolete parts	Nicowico	Swap Meet	3	12th May 2008 08:35 PM
BC546C obsolete ?	Jan Dupont	Parts	6	24th February 2007 02:24 PM
Source for obsolete parts	pacosoide	Parts	3	20th December 2006 03:13 PM
Obsolete trannies	5th element	Solid State	20	6th July 2003 01:09 PM
2SK135 2SJ50 MOSFET's Hitachi, obsolete parts	peranders	Swap Meet	2	18th April 2002 09:45 AM


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

14th November 2011, 11:42 PM	#2
dchisholm diyAudio Member Join Date: Mar 2011 Location: St Louis, Mo	LM3900: TI seems to be still manufacturing this IC. Digikey reports stock on hand. CA3080: I think the only inexpensive OTA still in production is the National LM13700. It's a dual, so you'll have to redo the PWB, or rig some kind of adapter. Digikey reports stock on-hand. LM3403: I'm not sure what advantage this part really has over an LM324 . . . and a TL074 should outperform it in most applications. Dale

15th November 2011, 02:50 AM	#4
Enzo diyAudio Member Join Date: Sep 2004 Location: Lansing, Michigan	And at Mouser: 15,000 LM3900 in stock at 50 cents each. 33 cents each if you buy 25 or more.

15th November 2011, 10:47 AM	#6
DF96 diyAudio Member Join Date: May 2007	In the UK Cricklewood Electronics are good for obsolete chips.

15th November 2011, 02:27 PM	#7
Neil Groves diyAudio Member Join Date: Sep 2011 Location: Near San Francisco	Thanks guys, i'll go take a look. Neil.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read