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Old 22nd September 2008, 07:18 PM   #11
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Default it seems that

that i will get quiet plenty of them ( all in original state ) do you thing worth doing something with them ....

may be a nice quasi ( but i need to have more data to preserve voltage rail levels )
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Old 17th July 2010, 09:08 AM   #12
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Quote:
Originally Posted by unclejed613 View Post
welcome to the wonderful world of OEM "house label" parts. you might (usually about a 50/50 chance) find a NTE or SK cross reference for it (a better chance is if you find an ECG or SK book from about 5 or 10 years after the date code on the device). there is a "shelf life" for cross referenced devices. there are many devices you can't find listings for anymore because they're obsolete for too long and are discontinued from even the cross references.

motorola did OEM parts for a lot of equipment manufacturers. usually they are a standard MOT part that has been given a "house number". MOT charges a few cents extra per device for relabeling parts like this, more if they do any selection for beta or other matching to a specification. RCA used to make oem parts too, often for their competitors in the TV market.... (think about that one for a minute...... )
by some (but few) amplifier brands cross reference lists were published in their service manuals, where the appropriate "2N" was to read behind the house label respectively fabric number (e. g. Altec or McIntosh).
Check out this threads:
Overview of Brands and Models from first Solid State Audio Amplifier Components want.
2N3055 inside - commercial famous amplifier models, quasi complementary power output
What was the first Complementary AB bipolar amplifiers?
Quote:
Originally Posted by sakis View Post
since we have some oldtimers in the forum i dare to post this pictures from recently salvaged transistors from a police stock house ....
interenet seems unable to provide information about that so any one knows about it is very welcome thanks sakis
this situation is still so in most cases. About the thread
Vintage Transistors
you will find some cover pictures of vintage data books. With help of the exactly title you can go in vintage book shops or special library in your aera for order or to borrow for copy.
I want to find such data books (or at least a cover photo) about vintage Transistors from Delco Radio (Delco GM).

Last edited by tiefbassuebertr; 17th July 2010 at 09:18 AM.
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