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4hv.org :: Forums :: General Science and Electronics
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My teacher let me have these ceramic IC's and I wanted to know...

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Inducktion
Wed Feb 09 2011, 10:21PM Print
Inducktion Registered Member #3637 Joined: Fri Jan 21 2011, 11:07PM
Location: Buffalo, NY
Posts: 1068
I wanted to know if they're worth anything, being made somewhere in the 1960's and 70's.

I got two. One's an XR2207CN Voltage controlled oscillator...looking on ebay, selling for around 10-20 dollars, is that right?
And,
One AMD C3101A SRAM chip from AMD. These go for 6-30 dollars on ebay...

I don't know what to do with them, they look cool though, in these ceramic DIP packages.
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Martin King
Wed Feb 09 2011, 10:31PM
Martin King Registered Member #3040 Joined: Tue Jul 27 2010, 03:15PM
Location: South of London. UK
Posts: 237
They are worth whatever people are prepared to pay for them. Either keep them and use them or stick them on EBAY and let market forces decide what they're worth. I would also say that if your teacher gave them to you because you show an interest in electronics and he thought they would be useful to you then IMO selling them would be a bit immoral.

Martin.
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Inducktion
Wed Feb 09 2011, 11:49PM
Inducktion Registered Member #3637 Joined: Fri Jan 21 2011, 11:07PM
Location: Buffalo, NY
Posts: 1068
Yeah, That's true. They were just thrown in his huge collection of IC's though, and i just picked them out because they 1. Looked different, and 2. AMD doesn't really make IC's anymore as far as I know.
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dmg
Thu Feb 10 2011, 04:09AM
dmg Registered Member #2628 Joined: Fri Jan 15 2010, 12:23AM
Location:
Posts: 627
Martin King wrote ...

They are worth whatever people are prepared to pay for them. Either keep them and use them or stick them on EBAY and let market forces decide what they're worth. I would also say that if your teacher gave them to you because you show an interest in electronics and he thought they would be useful to you then IMO selling them would be a bit immoral.

Martin.

I second this also.
These kind of teachers are few and far, and I was forchunate enough to have one exactly like yours.
Dont screw with a man's generosity and backstab him. Either use the parts or give them back.

The only thing I dont agree with Martin is that it would be a "bit immoral", it isnt "a bit" in any way.
Even thinking what you said Inducktion, makes you no better then low-life scum.
thats putting it nicely IMO.
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Dr. Slack
Thu Feb 10 2011, 07:51AM
Dr. Slack Registered Member #72 Joined: Thu Feb 09 2006, 08:29AM
Location: UK St. Albans
Posts: 1659
2. AMD doesn't really make IC's anymore as far as I know.

... unless you count Sempron, Athlon, Phenom, Opteron ...
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Steve Conner
Thu Feb 10 2011, 09:38AM
Steve Conner Registered Member #30 Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
You can make yourself a nice signal generator out of the XR2207.
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Martin King
Thu Feb 10 2011, 08:43PM
Martin King Registered Member #3040 Joined: Tue Jul 27 2010, 03:15PM
Location: South of London. UK
Posts: 237
Dr. Slack wrote ...

2. AMD doesn't really make IC's anymore as far as I know.

... unless you count Sempron, Athlon, Phenom, Opteron ...


They DESIGN them but they don't MAKE them any-more. They used to have a fab but it was hived of to become "The Foundry Company" and is now "Global Foundries"

Martin.
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Inducktion
Thu Feb 10 2011, 10:38PM
Inducktion Registered Member #3637 Joined: Fri Jan 21 2011, 11:07PM
Location: Buffalo, NY
Posts: 1068
I wasn't planning on selling them... o.O

I was just wondering, that's all. I'm gonna keep them as collectibles because they look retro, and it'd be kind of cool to show my kids one day, if i have kids.

I'm not that evil. xD
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Martin King
Fri Feb 11 2011, 12:16AM
Martin King Registered Member #3040 Joined: Tue Jul 27 2010, 03:15PM
Location: South of London. UK
Posts: 237
Inducktion wrote ...

I wasn't planning on selling them... o.O

Then their value is irrelevant and if you just need to know for curiosity's sake then the EBay guide prices should be enough.. I found a rotating laser level in a skip once, Link2 I've no interest in selling it (unless I get into serious financial difficulty) but a quick EBay search revealed what it was worth (and yes I was slightly surprised smile ) Turns out the UK Topcon agent is 5 minutes drive from my house, they checked it out for free and confirmed it is within spec. it just had dead batteries.

Martin.
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Inducktion
Fri Feb 11 2011, 12:32AM
Inducktion Registered Member #3637 Joined: Fri Jan 21 2011, 11:07PM
Location: Buffalo, NY
Posts: 1068
Wow. What is that used for?
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