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petronm20
Joined: 08 Mar 2017
Posts: 7
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 Posted: Tue Jul 11, 2017 11:25 pm Post subject: HP IC Gold Pin / Grey Zebra Trace / White Ceramic .. Info? |
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| I was wondering if anyone could give more information on these HP chips, they seem to have HP product numbers and am not sure if they translate to something else or are at all collectable as I couldn't seem to find any other examples of HP zebra trace white ceramic IC's. |
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berni
Joined: 17 May 2011
Posts: 59
Location: Germany
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| Posted: Wed Jul 12, 2017 1:05 am Post subject: |
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Both numbers refer to HP custom counter IC.
for the 1820-0634 I have a crossreference to B091-0100, another custom HP number. So, there's not much help, sorry.
Cheers, Bernhard |
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guso
Joined: 04 Feb 2009
Posts: 310
Location: Germany
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| Posted: Wed Jul 12, 2017 5:26 am Post subject: |
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It looks like I have a similar board - with 4 white/zebra 1820-0634. :-)
Google found some more details: https://islandlabs.eu/hp.html
HP 1820-0633:
The HP 1820-0633 marked A1U21 on the schematic, is a decade divider IC utilised in the time-base section of the HP5328A universal counter.
HP 1820-0634
The HP 1820-0634 marked A1U12 on the schematic, is a custom hex decade counter used in the HP5328A universal counter. |
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DM8800er
Joined: 28 Jun 2012
Posts: 279
Location: California
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| Posted: Tue Aug 01, 2017 7:47 pm Post subject: |
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Hi. I don't know if they are "collectible" -- but I am trying to assemble as many different grey trace chips as I can for an educational exhibit explaining the technology behind grey trace chips.
I don't have any HP's yet...
Are yours for sale? |
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