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2017 Sansui Serial Number Database

LBPete said:
Meade, Sansui Tube gear is well regarded. A PR-330 is a very nice piece. If you are in Lakewood, we are neighbors.
Yenrec, your serial number has been added to the July upload file. Thanks.

- Pete
Click to expand...
Has the serial # been confirmed for the pr330? I can't find one on the chassis or the schematic pasted to the inner cover.
There is a "Y 6" ink stamp on the inside near the back antenna leads.
 
551,"025010197",marktplaats.nl
A-3100,531010273,marktplaats.nl
A-5,581023373,marktplaats.nl
A-505,623082925,marktplaats.nl
A-E550,436080794,marktplaats.nl
AU-505,834030686,marktplaats.nl
AU-666,831080593,marktplaats.nl
TU-666,223070033,marktplaats.nl
AU-D22,432110183,marktplaats.nl
B-2101,224070122,marktplaats.nl
C-2101,214070259,marktplaats.nl
CD-V1000,205098003224,marktplaats.nl
CD-V1000,510050042,marktplaats.nl
EIGHT DELUXE,223060742,marktplaats.nl
G-301,818100096,marktplaats.nl
T-510L,634011048,marktplaats.nl
D-80C,664064469,marktplaats.nl
B-1000,507110542,marktplaats.nl
P-2000,"0910169281",marktplaats.nl
P-M77,323062191,marktplaats.nl
R-303,613072593,marktplaats.nl
SC-1120,249010153,marktplaats.nl
SC-1330,240030443,marktplaats.nl
SC-2110,587110324,marktplaats.nl
SE-3000,311051958,marktplaats.nl
SR-222,317011175,marktplaats.nl
T-5,431021622,marktplaats.nl
T-60,840080981,marktplaats.nl
TU-5900,816040662,marktplaats.nl
TU-9900,848060287,marktplaats.nl
TU-S55X,614039658,marktplaats.nl
A-1000,508060410,catawiki.com
AU-2200,215120989,catawiki.com
FR-D35,411041332,catawiki.com
RG-700,635096619,catawiki.com
RG-700,485036150,catawiki.com
SE-2000,510020541,catawiki.com
T-1000L,508050857,catawiki.com

AU-2200_tempofoon_wty.jpg

Always nice to have a warranty card!
 
Thanks guys, got 'um!
@PE9ZZ interesting warranty card.

Westy56 said:
Has the serial # been confirmed for the pr330? I can't find one on the chassis or the schematic pasted to the inner cover.
There is a "Y 6" ink stamp on the inside near the back antenna leads.
Click to expand...

The only PR-330 in the database is the one you referenced, serial number HW-731. Can you post a picture of the Y-6? It may be the serial number. At the time these were made, Sansui may have issued kits to be assembled by the buyer as a low cost alternative.

- Pete
 
LBPete said:
The only PR-330 in the database is the one you referenced, serial number HW-731. Can you post a picture of the Y-6? It may be the serial number. At the time these were made, Sansui may have issued kits to be assembled by the buyer as a low cost alternative.

- Pete
Click to expand...

The HW-731 sounds like the likely candidate. Mine came paired with a color matching HF# amplifier.
I was hoping the Y-6 could date it. It's just a purple ink stamp that looks like it was put on hastily..

I'll take a pic and post it if you still want it for your database.

Steve
 
Thanks, got it!

Westy56 said:
The HW-731 sounds like the likely candidate. Mine came paired with a color matching HF# amplifier.
I was hoping the Y-6 could date it. It's just a purple ink stamp that looks like it was put on hastily..

I'll take a pic and post it if you still want it for your database.
Steve
Click to expand...
As far as I know there is no date code in these early serial numbers. The date codes began with the 8 digit serial numbers.

- Pete
 
Forum search is borked but my browser remembered this thread...

AU-217,838090369,catawiki.com
AU-717,217110671,catawiki.com
CD-X217,214732003897,catawiki.com
CD-X311,510051107,catawiki.com
SE-8X,485053267,catawiki.com
TU-717,848010497,catawiki.com
331,"015073933",marktplaats.nl
551,"026101947",marktplaats.nl
771,"023101783",marktplaats.nl
AU-101,513120429,marktplaats.nl
AU-11000,216010313,marktplaats.nl
AU-217,838080210,marktplaats.nl
AU-2200,215120769,marktplaats.nl
AU-222,830090777,marktplaats.nl
AU-505,832110848,marktplaats.nl
AU-505,832090661,marktplaats.nl
AU-5900,857010404,marktplaats.nl
AU-999,222030405,marktplaats.nl
AU-G77X,635050830,marktplaats.nl
AU-G90X,624110541,marktplaats.nl
AU-X1,219070002,feebay
AU-X201,507061161,marktplaats.nl
AU-X417R,23803000197,marktplaats.nl
B-77,860082330,marktplaats.nl
CA-3000,225060019,marktplaats.nl
CR-M7,212010348,marktplaats.nl
D-W11,617105981,marktplaats.nl
D-X311WR,850080706,marktplaats.nl
G-7000,858040754,marktplaats.nl
RG-7,431050802,marktplaats.nl
SE-2000,500101085,marktplaats.nl
SR-5090,328090198,marktplaats.nl
TU-9900,848020209,marktplaats.nl
TU-9900,836050376,marktplaats.nl
TU-X301iL,618065819,marktplaats.nl
 
@PE9ZZ @Reidy12 @Monicker1

Here are some statistics on this month's report:

425 serial numbers posted.
33 duplicates in that group (one serial number was reported 3 times.)
392 serial numbers processed.
11 "invalid" serial numbers in that group. Most of these are non standard serial numbers that I put in manually.
381 serial numbers pasted into the Database Master Table.
66 "Paste Errors" these are serial number already in the database.

Most of the Paste Errors are duplicates of previously reported serial numbers but there are usually a few conflicts. These conflicts are sometimes "Decade Duplicates," (Sansui serial number can repeat every 10 years) but most times erroneous serial numbers. This month there are 4 with two different models attached to them. The attached PDF shows them. I checked to see if these models were built on the same production lines in the same months of production to see if either conflicting serial number was an outlier. No luck, they are all valid serial numbers with history on the same production lines on those dates.

I also have one that is missing a digit:
AU-517,2271025646 Reidy12,subito.it

If you guys can shed any light on these conflicts, let me know. In the meanwhile, I'll run the report. Any corrections can go into next month's report.

- Pete
 

Attachments

@Reidy12 Here's a couple more that fell out for not having enough digits in the serial number.

SAX-250,0210097, Reidy12,FB Sansui Vintage Australia JDM
SP-200,704320, Reidy12,FB Vintage Sansui Amplifiers Equipment

@PE9ZZ, @RichardMor
Here are some from last month, missing digits
AU-20000, 23702015,RichardMor
AU-D33,57303509, marktplaats.nl
SC-1330, 24909684, catawiki.com

- Pete
 
The only questionable number in the QRX 7001 is the third from last. It can only be a 0 I can't see it being a 9. Otherwise mine checks out.

I did not enter the AU 11000 two years ago. I will see if I can find it.

Sansui QRX 7001 4-Channel Receiver Photo #3772151 - Canuck Audio Mart

236080065.jpg


Update: I have not found an AU-11000 with a near matching serial number.
But I will have a handful of new ser nums for both AU-11000 and AU-11000A in my next report!

Ian

Question: Isn't 23 608 (August 1976) an temporal outlier for the QRX 7001 series? Almost ALL were made before the end of 1975 it seems. So perhaps the ser # ID is actually wrong on the unit shown here. But I am confident I am reading it correctly. And it looks both original and not tampered with.
 
Last edited:
@lambord Thanks!

Monicker1 said:
The only questionable number in the QRX 7001 is the third from last. It can only be a 0 I can't see it being a 9. Otherwise mine checks out.

Question: Isn't 23 608 (August 1976) an temporal outlier for the QRX 7001 series? Almost ALL were made before the end of 1975 it seems. So perhaps the ser # ID is actually wrong on the unit shown here. But I am confident I am reading it correctly. And it looks both original and not tampered with.
Click to expand...

I'm going to put it in as a 9 since it can't be a zero. The label isn't wrong, it's an example of how more serial numbers make the database more accurate. This one expands the known range of production.

- Pete
 
Okay
But in your entire Feb 28th database, you do not have a serial number beginning with 236080Xyz where X > 2.
X = 0 three times, X = 1 five times, X = 2 once.
Jus' sayin'.

Have a good weekend!
 
I not sure what you are suggesting. I don't follow your number logic. The database contains 9 units manufactured on production line 23 in August 1976:

AU-20000 236080009 August, 1976
AU-11000 236080040 August, 1976
AU-11000 236080065 August, 1976
AU-11000 23608010 August, 1976
QSD-1 236080122 August, 1976
AU-11000 236080134 August, 1976
AU-11000 236080163 August, 1976
AU-20000 236080197 August, 1976
771 236080294 August, 1976

It's interesting that the highest production number that month is surprising low, 294. August is the traditional vacation month in Japan with many factories shutting down so their may have been only a week or so of production.

The QRX-7001 in question is definitely and outlier but in the tens of thousands of Sansui serial numbers I've looked at, I've never seen an example of an incorrect serial number unless the paper label was modified in some way. I don't see evidence of that in the photo you posted.

The QRX-7001 production run on file goes from March '74 to December '75. The March '74 serial number is an outlier reported in December '03. It's one of the earliest entries in the database. The next earliest is May '74. This is also probably an outlier. Then there are 10 built in August '74. I would identify this as the start of production. It's the largest number on file for any month of production. When you are launching a new model you have to fill the pipeline so it makes sense to build a lot of them. They were built in every month through December '75. The last one on file was built in February '75 then yours in August '76.

Looking at the the two early outliers, 234031234 is suspect. The 03 for March is much more likely to be 08, the largest month of production. I also wonder about the production number 1234. The May '04 serial number 234050296 is also somewhat suspect. The 05 could also be 08 or there could have been a small trial run prior to the start of production.

I don't see any discrepancy in the first 5 digits of the serial number you posted. It's clearly 23608, August '76. Sansui often built units in batches based on order quantities. My guess is, they received a late order and built a few more. The only way to know for sure is to collect more QRX-7001 serial numbers to see if any more late production serial numbers turn up.

Does this help?

- Pete
 
LBPete said:
AU-D33,57303509, marktplaats.nl
SC-1330, 24909684, catawiki.com
Click to expand...
These are old postings. Had to go back to early February...
AU-D33,573030509, marktplaats.nl
SC-1330, 249090684, catawiki.com

Weird though that I missed those zeroes at the same spot.
 
My understanding is that the four digits following the date indicates the nth item off the assembly line & in the month in question. Our highest number is 236080294. And then nothing has been reported to the insertion point of 236080965. This suggests an outlier not only in terms of a calendar date, but that there is no evidence that the actual product count on line 23 in August 1976 is much higher than 300 or maybe 400. Statistically it is so improbable there would be such a huge gap between 294 and 965 if those nearly 700 units were ever produced yet none have been reported to our database. So we have an outlier in two respects: temporal and production line quantities if we go with 236080965.

I know this is detective work, and I am not trying to be argumentative. I have no personal stake in the data base. I wish I could find the AU-11000 with the same 236080065. I suspect that the AU-11000 is more likely correct but a single digit could have been misread. I have seen a number of AU-11000s listed on CAM going back several years, but not the one in question.

Thinking outside the box, if fake ID serial number tags were created to hide stolen equipment, then an extensive database effort like this would eventually reveal evidence of this even if we didn't know what we were looking at.

BTW You have another outlier QRX-7001 236020076. This would be two months after the last of the December 1975s were produced. This anomaly is a little more credible if it is correct. Okay. You referred to this one above, you just typod it as a February '75.

Anyway. I am done flogging this horse.
 
LBPete said:
I also have one that is missing a digit:
AU-517,2271025646 Reidy12,subito.it
Click to expand...
LBPete said:
@Reidy12 Here's a couple more that fell out for not having enough digits in the serial number.

SAX-250,0210097, Reidy12,FB Sansui Vintage Australia JDM
SP-200,704320, Reidy12,FB Vintage Sansui Amplifiers Equipment
Click to expand...

771 226070063 3/31/2023 Reidy12 AU-7900 226070063 3/28/21 auctionet
TU-919 210030239 3/31/2023 Reidy12 CA-F1 210030239 11/30/19 internet

AU-517,2271025646 >> AU-517,227102646,Reidy12,subito.it Delete the extra 5
SAX-250,0210097 >> SAX-250,0210097, Reidy12,FB Sansui Vintage Australia JDM Looks to be correct
SP-200,?704320? >> Damaged label, kick it out
771 226070063 >>771,22607063?,Reidy12,ebay Canada (back panel only) Extra 0 and therefore missing the last digit. There's a 226070637 in the database....can you see as 7 in the last place?
TU-919 210030239 >> TU-919,210030239,Reidy12,reverb.com USA It's a bad label and this could be a better interpretation which is in the database

Good to call these out Pete. Couple of mistakes on my part and couple I should have seen by crosschecking with the database pdf. It takes some time to get these as you know but time is sometimes a bit short! Your software is doing a good job :thumbsup:

upload_2023-4-2_19-38-25.jpeg upload_2023-4-2_19-39-47.jpeg upload_2023-4-2_19-42-53.png upload_2023-4-2_19-43-52.png upload_2023-4-2_19-48-0.jpeg
 
Reidy12 said:
SAX-250,0210097 >> SAX-250,0210097, Reidy12,FB Sansui Vintage Australia JDM Looks to be correct
Click to expand...
I agree, it's the first confirmed 7 digit paper label serial number I've seen.
SP-200,?704320? >> Damaged label, kick it out
Click to expand...
I agree, it's gone.
771 226070063 >>771,22607063?,Reidy12,ebay Canada (back panel only) Extra 0 and therefore missing the last digit. There's a 226070637 in the database....can you see as 7 in the last place?
Click to expand...
I'm not too concerned by a missing last digit. I'll put it in without it.
TU-919 210030239 >> TU-919,210030239,Reidy12,reverb.com USA It's a bad label and this could be a better interpretation which is in the database
Click to expand...
That label looks like crap. I don't trust it so lets kick it out.

Your software is doing a good job :thumbsup:
Click to expand...
It's true but it's often hard to tell if the software is doing it's job or did I f'k up. :rolleyes:

- Pete
 
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