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sherwoods12
Joined: 04 Aug 2012
Posts: 13
Location: Nampa, Idaho
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 Posted: Tue Aug 07, 2012 11:28 am Post subject: Some of my old things |
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Here I will post pictures of stuff as I go through some boxes. Over the last 30 years in the electronics and computer industry, I've accumilated (and tossed) quite a few "relics".
Here is an example. |
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sherwoods12
Joined: 04 Aug 2012
Posts: 13
Location: Nampa, Idaho
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| Posted: Tue Aug 07, 2012 11:35 am Post subject: Here's something I picked up, not sure what it is |
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I got this when I worked for a company that made tape drive read/write heads.
It's like a thick wafer of ceramic, about 4" dia, polished and has gold "traces" on it. I will try to get a closer picture of one of the traces.
Anyone know what this is? |
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sherwoods12
Joined: 04 Aug 2012
Posts: 13
Location: Nampa, Idaho
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| Posted: Tue Aug 07, 2012 12:55 pm Post subject: Tubes! |
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| Some tubes in boxes, some have the original prices on them. I wonder what they are worth now... |
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doccybrown
Joined: 03 Oct 2005
Posts: 1736
Location: Germany
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| Posted: Wed Aug 08, 2012 1:52 pm Post subject: |
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Hi,
nice things! 
Did you remove the laser tube from an early
laser printer or photocopier? These were
also used in early CD- and Laser Disc Players!
Considerung the shapes on the wafer they
look like flash-memories but only a macro
picture of them could clarify it!
/doccy
_________________
Ordem e Progresso |
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| Posted: Wed Aug 08, 2012 3:53 pm Post subject: |
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| Quote: | Considerung the shapes on the wafer they
look like flash-memories but only a macro
picture of them could clarify it!
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They are not integrated circuits, they are actually wide gold traces. Without a way to make a "microphotograph" it is hard to show. I'll work on it though.
The wafer is actually about 2mm-4mm thick and made of a ceramic material or glass, rather than silcon. |
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sherwoods12
Joined: 04 Aug 2012
Posts: 13
Location: Nampa, Idaho
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| Posted: Wed Aug 08, 2012 4:16 pm Post subject: |
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Here is a small section, blown up as big as possible without pixelating  too much. |
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doccybrown
Joined: 03 Oct 2005
Posts: 1736
Location: Germany
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| Posted: Thu Aug 09, 2012 2:08 am Post subject: |
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Strange looking structures and definitely no flash-memory...
Maybe the bottom layer of a multitrack read/write head?
Not unlikely if you say you got this wafers at a tape read/write
head manufacturer (I guess they also made/make heads for
computer streamer drives). |
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UMMR
Joined: 23 Aug 2007
Posts: 381
Location: Udine, ITALY
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| Posted: Thu Aug 09, 2012 10:11 am Post subject: |
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Hi,
the nice Melles-Griot laser looks just like the HeNe gas laser tubes found in many vintage barcode scanners. I mean the large "flat" scanners used in many markets and shops, not the little hand-held devices. You can easily find a suitable power supply.
Usually the output power is roughly 8-10 mW; the visibile light is bright red (670/690 nm).
Laser printers usually have infrared laser emitters (diodes). The only laser printer I have seen equipped with a laser tube instead of a laser diode is a very old Xerox machine (1980, I think).
The wafer is indeed much more interesting.
It's really difficult to tell what it can be.
I have a little wafer, with similar (even tough not identical) patterns on it, won years ago on Ebay and marked as a "GaAs Amp sample".
Paolo |
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