very, very old serial numbers
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- kb4mdz
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very, very old serial numbers
Anyone here remember the way to decode the approximate manufacture date out of the OLD Moto. serial numbers? 6 character; I've seen 2 letters, then 3 digits and then a letter. Like: QA361T.
I know this will take the date of manufacture back to BEFORE 1976. So that's at least 30 years old, by my counts. Jeepers, there's some old a** stuff out there in radio land....
Chuk
I know this will take the date of manufacture back to BEFORE 1976. So that's at least 30 years old, by my counts. Jeepers, there's some old a** stuff out there in radio land....
Chuk
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Old Numbers
A better way to figure out how old a radio might be is to find date codes on the parts inside the radio. a number of 7510 would be 1975, tenth week
or 434 could be 1974,34th week or 1984, 34th week. Parts that have date codes would be Ic's, caps, larger transistors. Like TO-3 packages. On real old radios, Tubes have date codes on them.
Good Luck
mm
or 434 could be 1974,34th week or 1984, 34th week. Parts that have date codes would be Ic's, caps, larger transistors. Like TO-3 packages. On real old radios, Tubes have date codes on them.
Good Luck
mm
- kb4mdz
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date codes
Mike -
A good suggestion, and one I would have tried, had I not encountered a) that many years of dust inside the cabinet, and b) not enough time to clean it out. Was trying to get the site PM'ed before the end of the day, and so had no extra time.
A good suggestion, and one I would have tried, had I not encountered a) that many years of dust inside the cabinet, and b) not enough time to clean it out. Was trying to get the site PM'ed before the end of the day, and so had no extra time.
- kb4mdz
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- Joined: Tue Oct 02, 2001 4:00 pm
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Date codes...
Failure, first round.
found the cheat sheet here on the site, and I tried extrapolating backwards from 1976; using the first & 2nd letters of the old style, using similar format as the current 10-character system; x(Year)(half-a-Month)...
That way, I come up with. A=1976, Z=1975, Y= 74, etc. Q would give me 1966? N would give me 1964? That can't be right! Gotta be something else....
Frustrated.
found the cheat sheet here on the site, and I tried extrapolating backwards from 1976; using the first & 2nd letters of the old style, using similar format as the current 10-character system; x(Year)(half-a-Month)...
That way, I come up with. A=1976, Z=1975, Y= 74, etc. Q would give me 1966? N would give me 1964? That can't be right! Gotta be something else....
Frustrated.
- kb4mdz
- Posts: 282
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serial numbers.
OK, I get the 3rd week, and the 6 for June, but how did you get the year?
Oh, and the other question was model: both Micor units; one continuous duty, one just the 'mobile' PA casting, tho 100 Watts.
"QA361T is from 3rd wk (16-21) of June, 1975 "
Oh, and the other question was model: both Micor units; one continuous duty, one just the 'mobile' PA casting, tho 100 Watts.
"QA361T is from 3rd wk (16-21) of June, 1975 "
- kb4mdz
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very, very old serial numbers
OK, well I stand corrected; it's just what seemed logical to me. But I'm still stumped as to how you got "June" and "3rd week" and "1975" I've come across another one which is "NAxxxx(something)"
I know, I know, these things deserve to die a raucous death under the treads of a piece of heavy equipment.
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No, the 3 and 6 do NOT denote 3rd week of 6th month. Actually it's the Q and T that set the date window, the middle part is the unique sequence number for that time frame.
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I know, I know, these things deserve to die a raucous death under the treads of a piece of heavy equipment.
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No, the 3 and 6 do NOT denote 3rd week of 6th month. Actually it's the Q and T that set the date window, the middle part is the unique sequence number for that time frame.
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MICOR
Both the Micor and Mocom 70 came out in late 69, early 70. I remember because that was when I started in the business and didn't yet know enough to be impressed! They didn't even need a power supply that sang.
- kb4mdz
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very, very old s/n's
OK, so both of these units were built before 1978; that makes them old enough to vote, old enough to drink liquor in all states, but they're still as much as 2 decades younger than me, so I have seniority over them. Especially since they are in such sad, sad shape... but I digress.
The question still stands: What is the format of the old serial numbers?
The question still stands: What is the format of the old serial numbers?
If we are talking about Micors, the first Micors made were manufactured in October 1975, they used the old serial number style untill 1978, when the new style numbering was enacted.