Thursday, March 26, 2009

Collectible Semiconductors: Transistors Diodes and More!

Old Semiconductors from the !960's and 70's are some of the most prized additions to my IC and Electronics Collection. My wife is getting difficult about bringing more stuff home but it is really fun. Cataloging these old parts is very difficult as some of the logos are hard to identify and many do not have datecodes. Here are some new additions...

Thursday, March 12, 2009

RTL CTL CµL LOGIC in the Early IC Technology at Fairchild Semiconductor

Back in the early 60’s Fairchild and Texas Instruments decided to develop new technologies and integrated circuits for the commercial marketplace. For Fairchild the big breakthrough was Planar technology that made them one of the key players in the early days. Initially the first IC’s were RTL (Resistor Transistor Logic) followed by CµLOGIC (Counting Logic). Most of the sales were to defense contractors in fact NASA used the 914 and 923 on the Apollo Guidance Computer. Prices in those days were around $50 each so I decided to offer some of the same types of parts at prices below the threshold set in 1960-70. I actually worked at Fairchild in the early 1970’s and some of these parts were still being sold- although DTL was the hot part when I was there! So here are some of the parts that I have added to eBay and lots more coming…
If you have input on what these parts actually are and what they were used for please send it along. All I know is there were basic gates and flip-flops in those days!
Here is what I added today
All Fairchild
F900HC Vintage 1978
FµL90029 Vintage 1974
FµL91529 Vintage 1969
FµL90429 Vintage 1969
Fµ5B995879X Vintage 1971
FµL92129 Vintage 1967
FµL91129 Vintage 1965
FµL97429 Vintage 1970
FµL92629 Vintage 1969
FµL90329 Vintage 1969
FµL92329 Vintage 1967
F923HC Vintage 1983
MC910G Vintage 1967
FµL91429 Vintage 1967
FµL91029 Vintage 1964
More later……….

Monday, March 9, 2009

NEW Discovery! Intel Collectible Museum Quality D8748H and D8751H Processors!

A good friend of mine turned me on to a few tubes of "Museum Quality" Intel Processors. The Micro Controllers are already available in used and as pulls but it is rare to add some new in the original tubes to your IC Collection. These were both very popular parts in the early 1980's. Not sure the datecode of these as I still don't know how to decipher all the old Intel lotcodes. Wish some one would help. Just put them up on our eBay website today... Nice parts!

Saturday, March 7, 2009

Vintage Zilog CPU's and Support Chips from late 1970's added to Collection!

Vintage Zilog CPU's and Support Chips are becoming hard to find- especially in CERDIP, Ceramic or Gold packages. I just added quite a few of new ones to my collection and of course to our store on eBay! Please check it out and if you have any old parts you would like to offer us please contact me at
Thanks for checking out our blog and store

Monday, March 2, 2009

Vintage Military IC's are becoming very hard to Find! Collecting Military Integrated Circuits

I really enjoy the quality of Military Integrated Circuits! They usually have alot of gold and with age the gold finish takes on a nice patina. Some of the parts are becoming difficult to catalog as they are not made anymore. For the next few weeks I am going to feature a few military parts that I have recently discovered and will be adding to my collection. All for now...
Dave Freeman
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