Identifying chips

[addshoe]

I recently gutted an old organ for parts and there are a lot of chips that I am curious if they are worth salvaging or just destined for the scrap heap.

Couple I just pulled off the boards:

8 pin 551-009 7742
14 pin 551-034-00 7815

I did some searching and only come up with where they are used in the organ I got them from with little information. Any tips on IDing these as I pull them would be awesome! If they are useful to anyone I would be willing to part with some too

Thanks!

[DutchMF]

Try this: http://www.organservice.com/scgi-bin/SearchPart.pl

apparently, the first one is an LM4558 dual opamp, so that could be usefull. The second is a dual input OR gate, not sure what you could use that for....

Paul

[hammerheadmusicman]

old 4558? Pass me the tubescreamer

[addshoe]

That's a good resource, thanks for the link!

I'll post up what I pull off the boards in the near future and distribute the wealth if anyone is interested in some oldie parts, I know I don't need em all!

Thanks again!

[DutchMF]

That's a good resource, thanks for the link!

I'll post up what I pull off the boards in the near future and distribute the wealth if anyone is interested in some oldie parts, I know I don't need em all!

Thanks again!

No problem man, just keep me in mind when you take apart that organ!  I'd love to do stuff like this but my wife won't let me in the living room of our apartment.... understandably!

Paul

[Guitar Master]

I hope to hear how this goes! There are multiple free organs in my area that I have been thinking about parting

[addshoe]

UPDATE:

So far I have pulled a lot of those LM4558 chips off the boards, around 15. PM me if anyone wants. I found this to help identify the ones I remove as I go in addition to the link provided above:

551-009-00   (4558 op amp)
551-025-00   (CA3080 OTA)
551-033-00   (4001 NOR gate)
551-034-00   (MC14071BCP OR gate)
551-038-00   (4013 dual F/F)
551-044-00   (MC1455 Timer)
551-052-00   (MC14520 Divider)
551-054-00   (MC14069 Hex inverter)
552-003-00   (AMI C10541/ Mostek MK50240N TOS)
552-022-00   (AMI C2781 Sustain Keyer)
522-024-00   (AMI C22083 Chord/Rhythm processor)

Any more of these useful?

There are of course lots, like 1000s, of resistors, diodes and caps. The caps may be usable but the diodes and resistors are so tight to the board when removed there is not much lead left to make the usable without soldering some extra lead onto them.

I have some pictures of the boards that I will upload and post this evening when I get home.

[DutchMF]

The 4558, CA 3080 OTA and 4013 could be useful, not sure of the others. Caps are not really worth removing, in my opinion, as they age and deteriorate with use. Maybe there're some nice transistors?

Paul

[Scruffie]

The 4069 is useful too, the others I probably wouldn't bother with, might be useful to some synth guys I guess.

[addshoe]

I will heed the advice on that ICs.

I totally forgot to mention transistors! There are a lot of em on the boards. Found a handful of 2N... forgot the code... there are also a number of them that have no code on the back. Did a little google searching but haven't come up with any matches yet. I will post a list of these later.