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Author Topic: Alpha serial numbers - date made?  (Read 2382 times)
KA1J
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Posts: 168




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« on: October 09, 2012, 11:50:30 PM »

I'm looking to buy an Alpha 77DX/SX and wonder what years the serial numbers correspond to. I think the old site used to have a list of the numbers but I can't find them on the new site. Anyone know where such a list might be found?

Thanks.
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KF6ABU
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Posts: 351




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« Reply #1 on: October 10, 2012, 11:36:50 AM »

Found this online, from Glenn AE0Q





In 2000 when Alpha changed to 10 digit serial numbers it became easier to understand the number.

first 2 digits = model number  (87, 99, 89)
next 2 = last two digits of the year of build
third 2 = week in that year of build
last 4 = unique number of the amp in the production run of that model

The early 87a and 89 amps just used 8 digits for year, week, (4) number of amp.

Late in the 90's changed to the first digit = model, 2nd digit = year, next 2 = week, last 4 = number of amp.

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WB2WIK
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Posts: 20574




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« Reply #2 on: October 10, 2012, 01:42:18 PM »

Found this online, from Glenn AE0Q





In 2000 when Alpha changed to 10 digit serial numbers it became easier to understand the number.

first 2 digits = model number  (87, 99, 89)
next 2 = last two digits of the year of build
third 2 = week in that year of build
last 4 = unique number of the amp in the production run of that model

The early 87a and 89 amps just used 8 digits for year, week, (4) number of amp.

Late in the 90's changed to the first digit = model, 2nd digit = year, next 2 = week, last 4 = number of amp.



Yeah, but the 77DX/77SX are older than all of those and date back to the 1970s.
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KF6ABU
Member

Posts: 351




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« Reply #3 on: October 10, 2012, 01:53:21 PM »

Found this online, from Glenn AE0Q





In 2000 when Alpha changed to 10 digit serial numbers it became easier to understand the number.

first 2 digits = model number  (87, 99, 89)
next 2 = last two digits of the year of build
third 2 = week in that year of build
last 4 = unique number of the amp in the production run of that model

The early 87a and 89 amps just used 8 digits for year, week, (4) number of amp.

Late in the 90's changed to the first digit = model, 2nd digit = year, next 2 = week, last 4 = number of amp.



Yeah, but the 77DX/77SX are older than all of those and date back to the 1970s.

Ahh.. Well you were what.. in your 50's back then?  Tongue

I'm sure you know the answer to his question, since you know everything about amps. Just tell him already.
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WB2WIK
Member

Posts: 20574




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« Reply #4 on: October 10, 2012, 02:15:00 PM »

Found this online, from Glenn AE0Q





In 2000 when Alpha changed to 10 digit serial numbers it became easier to understand the number.

first 2 digits = model number  (87, 99, 89)
next 2 = last two digits of the year of build
third 2 = week in that year of build
last 4 = unique number of the amp in the production run of that model

The early 87a and 89 amps just used 8 digits for year, week, (4) number of amp.

Late in the 90's changed to the first digit = model, 2nd digit = year, next 2 = week, last 4 = number of amp.



Yeah, but the 77DX/77SX are older than all of those and date back to the 1970s.

Ahh.. Well you were what.. in your 50's back then?  Tongue

I'm sure you know the answer to his question, since you know everything about amps. Just tell him already.

No, I really don't know.  I did have a couple Alpha amps that were from that era, but I don't have them now so I have nothing to look at.

Somebody probably does.
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W2NO
Member

Posts: 11




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« Reply #5 on: October 10, 2012, 02:41:42 PM »

Here is the link to the Production date file.

http://www.rfconcepts.com/Legacy-Products

Dan W2NO
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K6AER
Member

Posts: 3501




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« Reply #6 on: October 11, 2012, 12:17:56 PM »

Until the 4 digit series amplifier came on line the model number generally reflected the year they came into production.
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