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 Post subject: EIA Codes!
PostPosted: May Wed 05, 2021 11:36 am 
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Joined: Dec Sat 29, 2018 3:27 pm
Posts: 30
I'm back to work on my EIA Code compilation project after a long hiatus, so I thought I'd re-post it for those that may have missed it.

What are EIA codes?
For anyone researching old electronics and their manufacturers, the 6-8 digit EIA code that is printed on components can shed a lot of light on the history of electronic components. A lot of people use these codes to find who made speakers, potentiometers, transformers, etc. and also to date when those components were manufactured.

This page on Triode Electronics does a great job of explaining how to make use of them, but the list of companies on that page is far from complete: http://www.triodeel.com/eiacode.htm

So what is this thing?
Over the last 2 years I've been digitizing and compiling as many EIA Production Source Date Code lists as I could scrounge together into a massive, searchable spreadsheet. No longer will you need to fiddle with PDF documents containing scanned images of 50 year old paper!

My list so far (V 3.3) compiles 24 different yearly lists (of the total 55 lists ever published between 1946 to 2001), and despite that there are still plenty of different company numbers that are missing from the list (about 61 by my count, not counting re-used EIA numbers over the years).

I just got physical copies of 7 more EIA code lists that are unavailable on the internet, from about 1964 to 1972, and I'll be digitizing them in the coming weeks/months. The plan is to have a total of 31 lists in the compilation by the end of summer.
Eventually the plan is to complete the collection and then I can simplify the list down to just date ranges for a given code or company.

Is all this really necessary?
Of course not. I'm just weird and I like doing this archival work.
You could probably get by fine with just using one or two lists from the 50's and 60's for most tube gear. But seeing enough esoteric components over a long enough career, you're bound to run into some obscure EIA code that requires way too much research than is worth to figure out the manufacturer.

Well I've done the work for you and it's freely available to anyone who wants to make use of it!

Here is my ever-evolving Google spreadsheet compilation of EIA codes. Save and share to your hearts content:
https://docs.google.com/spreadsheets/d/ ... sp=sharing


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 Post subject: Re: EIA Codes!
PostPosted: May Wed 05, 2021 6:39 pm 
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Joined: Jan Tue 31, 2012 1:55 am
Posts: 17427
Location: Mountains of Mourne. Ireland.
...obscure EIA code
Haven't you heard of google!

Edit: okay, I've just reread your post.
I'm just weird and I like doing this archival work.
:)

docs.google.com doesn't work on my Mac. lol


Attachments:
1962_EIA_codes.pdf [1.91 MiB]
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 Post subject: Re: EIA Codes!
PostPosted: May Wed 05, 2021 9:55 pm 
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Joined: Dec Sat 29, 2018 3:27 pm
Posts: 30
Ah, didn't know that page doesn't work on MAC.
Well, just for you, I exported an Excel file of the V 3.3 list. Maybe you have some program that can run that?


Attachments:
EIA Code Compilation V3.3- 05.05.21.xlsx [540.93 KiB]
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 Post subject: Re: EIA Codes!
PostPosted: May Wed 05, 2021 11:10 pm 
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Joined: Jan Tue 31, 2012 1:55 am
Posts: 17427
Location: Mountains of Mourne. Ireland.
I'm sure that it works okay on today's computers.
My Mac is 16 years old and the message was "you are using an outdated browser"

The rest of the internet works. lol

Yes, I can view the xlsx file in OpenOffice.
that's a lot of work dood... :)
Thanks, Greg.


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 Post subject: Re: EIA Codes!
PostPosted: May Sun 09, 2021 10:44 pm 
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Joined: Dec Sat 29, 2018 3:27 pm
Posts: 30
1972 list added and list renamed to V 3.4 - 08.05.21 (yes, I'm using European dating)

I had read some people in the past saying that the EIA codes didn't change meaningfully between years, but I think the addition of this 1972 list shows how wrong that is better than any others so far.

Just to name a few examples, the EIA codes for 263, 266, 269, 272, 313, 330, 341, 344, 349, 355, 359, 374, 399, 408, 415, 424, 426, 441, 443, 447, 448, 458, 471, 478, 485, 497 and more were used in the 50's, then discontinued before the 60's, but in 1972 those codes are assigned to new companies (back then) that were not in my compilation up until now, then those companies disappear before the 80's.


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 Post subject: Re: EIA Codes!
PostPosted: May Sat 15, 2021 5:27 pm 
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Joined: Dec Sat 29, 2018 3:27 pm
Posts: 30
1965 and 1967 lists added, and list renamed to V 3.6.

Link above still works but here it is again:
https://docs.google.com/spreadsheets/d/ ... sp=sharing


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 Post subject: Re: EIA Codes!
PostPosted: May Tue 25, 2021 6:04 pm 
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Joined: Dec Thu 06, 2007 11:54 pm
Posts: 3048
Location: Hayward, California USA
Thank you for your work and for sharing it!

_________________
Quote: (Antique TV collecting) always seemed to me to be a fringe hobby that only weirdos did.


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 Post subject: Re: EIA Codes!
PostPosted: Jun Tue 01, 2021 12:22 pm 
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Joined: Dec Sat 29, 2018 3:27 pm
Posts: 30
I appreciate it, Chris! Glad I can be of some help.


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 Post subject: Re: EIA Codes!
PostPosted: Jun Sun 06, 2021 5:50 pm 
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Joined: Dec Sat 29, 2018 3:27 pm
Posts: 30
V 4.0 now live! Biggest update to the list so far, even though I just added one yearly list.
Added 1973 list (Thanks to Tim from this forum!)

Completely revamped the color range for years. Overhauled lots of smaller things to improve legibility and fix various formatting issues, spelling inconsistencies and design issues.
This is the definitive version of my compilation until I get more lists to digitize (on the way!)

Link above still works but here it is again:
https://docs.google.com/spreadsheets/d/ ... sp=sharing


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 Post subject: Re: EIA Codes!
PostPosted: Jun Tue 22, 2021 2:18 pm 
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Joined: Dec Sat 29, 2018 3:27 pm
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V4.3 of the compilation now live! Added 1977 and 1987 lists
Got 2 more lists waiting for digitization: 1966 and 1980, so they'll be added very soon.

Old link still works, but here it is again:
https://docs.google.com/spreadsheets/d/ ... sp=sharing

And for those who want a shorter URL:
tinyurl.com/eiacodes


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 Post subject: Re: EIA Codes!
PostPosted: Jul Thu 01, 2021 6:51 pm 
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Joined: Dec Sat 29, 2018 3:27 pm
Posts: 30
V4.5 now live! Added 1966 and 1980

Updated the custom PDF version of the list, which can be downloaded from the top bar of the compilation or from this link:
https://drive.google.com/file/d/1pK5ywj ... sp=sharing

It's break time for me until I get more lists to transcribe. Got about 7 more lists I'm hoping to acquire in the next few weeks, but any help in finding or scanning more lists is always welcome


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 Post subject: Re: EIA Codes!
PostPosted: Jul Thu 08, 2021 5:20 pm 
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Joined: Dec Sat 29, 2018 3:27 pm
Posts: 30
Well, after having badgered the ECIA about Source Code lists they might have in their own library, they did me a huge favor and scanned their copies of the 1996, 1997, 1998 and 1999 lists. According to them, those were the only lists they had not already digitized/scanned from their physical library.
For anyone interested in those lists, you can find copies of them on their website (I've also added archive.org re-hosting in my compilation): https://www.ecianow.org/eia-source-codes

I've already added 1996, but I'll transcribe the 1997, 1998 and 1999 lists into my compilation soon


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 Post subject: Re: EIA Codes!
PostPosted: Jul Fri 16, 2021 5:48 pm 
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Joined: Dec Sat 29, 2018 3:27 pm
Posts: 30
V5.0 is now live!

Added 1997, 1998 and 1999 lists
Also added information on the 20 numbers still missing from the list. See "More information" tab in the compilation for details.
Updated the custom PDF version to V5.0 as well. Here are direct links:

Main compilation:
tinyurl.com/eiacodes
or
https://docs.google.com/spreadsheets/d/ ... chw5_8N9o/

PDF version of V5.0:
https://drive.google.com/file/d/1amkDtj ... sp=sharing


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