The Ware for April 2017 is shown below.
This is a guest ware, but the contributor shall remain anonymous per request. Thank you for the contribution, you know who you are!
This entry was posted on Thursday, April 27th, 2017 at 1:46 am and is filed under name that ware. You can follow any responses to this entry through the RSS 2.0 feed.
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Bar code reader or some kind of remote receiver.?
An amateur radio amplifier would be my guess based on the MC1590G and the power transistors.
I think these are custom HP part numbers on the ICs.
e.g. (from a quick internet search:
1826-0065 COMPARATOR IC LM311P
1820-0720 D58830N
D58830N should be DS8830N, which is a dual differential line driver.
My guess: A late 1970’s to 1980’s differential probe by HP
The style of construction says ’70s or ’80s, but the date codes look like 2003-2004.
The date code on the MC1590 (can in the upper left) clearly reads “8114”: 14th week of 1981. Which seems consistent with the overall construction — an early-2000s device would be expected to have at least *some* surface-mount parts.
Yep, the good old “four by fours”.
Near the upper left we have date codes of 8040 and 8114, and near the right 81xx, so I am placing it at the early 80s. Definitely not 2003ish.
Looks vaguely like a TV pre-amplifier I pulled apart, much to my folks annoyance!
This looks like a laser diode driver. However, the vintage of other components suggests otherwise.
My guess that it’s an HP 10780A Laser Receiver, part of an older HP Laser transducer system.
My first thought was that it looked similar to some of the older HP O-E converters I’d used for fiber optics stuff, but the MC1590 amplifier B/W was too low for that.
That led me to look in the 1985 HP catalog at optical sensor stuff, leading to the 5501A Laser Transducer System and its’ receiver.
Manual here:
http://www.hudler.org/pub/HP/10780-90009%20-%2010780A%20Laser%20Receiver%20for%205501A%20%5BPrefix%202204A%5D%20(Jan%201982).pdf
It looks like you are almost certainly correct.
Page 7-3 of your linked PDF contains both a B&W photo of the ware in question as well as the full schematic.
Nice job! :-)
> Page 7-3 of your linked PDF contains both a B&W photo …
Also worth noting are pages 6-1 and 6-2, which give the manual backdating instructions for older revisions; based on the changes seen between the two layouts, I’d say this is a 1644A prefix board, layout markup here:
https://sites.google.com/site/fpgastuff/misc/ntw_april_2017/ntw-april-2017-markup.jpg
Earlier, I wrote:
> I’d say this is a 1644A prefix board
Actually, I’ve got that completely backwards-i.e. the board pictured in the HP manual looks like the 1644A prefix with the “change 2” backdating (remove C16, add jumpers), whereas the NTW board *has* C16, and no jumpers.
That said, I think the NTW board might be a later prefix than any given in that 1948A service manual ( the 1948A would have R14=620 ohm, R17=180 ohm like the NTW board, but there also seem to be other PCB routing changes near regulator U3 )
Correcting my correction :)
> the NTW board might be a later prefix than
> any given in that 1948A service manual
As it turns out, I had opened the wrong pdf earlier tonight, I was reading the ‘1948A’ prefix service manual instead of the ‘2204A’ prefix manual.
> but there also seem to be other PCB routing
> changes near regulator U3
The 2204A circuit description seems to match the NTW board- the regulator circuit was changed to use a 7805 instead of a 7810 at U3.
(HP seems to never have updated their service manual’s picture-of-the-PCB for the later version manuals, but the schematic, BOM, and layout were changed)
My guess that it’s an HP 10780A Laser Receiver, part of an older HP Laser transducer system.
(longer comment with links stuck in moderation)
There’s an HP Journal article describing the 5501A system, including theory of operation of the 10780A receiver, here:
http://www.hpl.hp.com/hpjournal/pdfs/IssuePDFs/1976-02.pdf
Looking further at the PCB layout, there are some minor layout differences between the “A” service manual link I provided and the NTW picture, which could be either production changes or possibly a later version of the module- it looks like the 10780C and 10780F are still in production at Keysight today.
Zygo 7080 Optical Receiver
http://www.repairfaq.org/sam/sale/7080-1.jpg
Sam’s Laser FAQ: “Zygo 7080 looks similar to the HP/Agilent optical receivers but has a 7 pin LEMO connector instead of the funny 4 pin BNC”, Bunnies one has 4 pin connector
I think it’s part of a tv or remote. I’m quite intrigued with the green bulb in the middle.