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Does anybody own a pair without serial numbers? I do and am curious t find out when they may have been produced (I'm assuming at the begninning of production which would suggest I have a very early pair).
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I have 3 sets and one doesn¡¯t have serial numbers.?
Does anybody own a pair without serial numbers? I do and am curious t find out when they may have been produced (I'm assuming at the begninning of production which would suggest I have a very early pair).
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I have a mirror image pair w/o serial numbers.
Sent from my Verizon, Samsung Galaxy smartphone
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-------- Original message -------- From: richard adelberg <richardadelberg@...> Date: 9/23/20 9:55 AM (GMT-07:00) Subject: Re: [DahlquistSpeakers] DQ-10's with no serial numbers
I have 3 sets and one doesn¡¯t have serial numbers.? Does anybody own a pair without serial numbers? I do and am curious t find out when they may have been produced (I'm assuming at the begninning of production which would suggest I have a very early pair).
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So my question remains....does the lack of serials mean anything? Can anyone confirm (not speculate) that these are very early production run units and that serials started later? I have no clue. I bought both my pairs from other people many years ago (I sold my own personally purchased pair before that, so no frame of reference).
I'm not trying to figure out anything bigger with this question. Merely curious and also slightly shocked Dahlquist would initiate production of their flagship product without using serial numbers.
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They could have been non mirror? imaged and latter turned into? mirrow imaged speakers
On Wed, Sep 23, 2020 at 1:07 PM, w e <sky27709@...> wrote: So my question remains....does the lack of serials mean anything? Can anyone confirm (not speculate) that these are very early production run units and that serials started later? I have no clue. I bought both my pairs from other people many years ago (I sold my own personally purchased pair before that, so no frame of reference).
I'm not trying to figure out anything bigger with this question. Merely curious and also slightly shocked Dahlquist would initiate production of their flagship product without using serial numbers.
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There was a set on eBay not long ago sold by a store that said he had researched the subject. His were first 6 months of production based on serial number and the fact the early ones had a woofer made by another cOmpany not advent! If u go back on eBay tovsold dq 10¡¯s you might find his info? I¡¯ll look
So my question remains....does the lack of serials mean anything? Can anyone confirm (not speculate) that these are very early production run units and that serials started later? I have no clue. I bought both my pairs from other people many years ago (moany nI sold my own personally purchased pair before that, so no frame of reference).
I'm not trying to figure out anything bigger with this question. Merely curious and also slightly shocked Dahlquist would initiate production of their flagship product without using serial numbers.
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There was a set on eBay not long ago sold by a store that said he had researched the subject. His were first 6 months of production based on serial number and the fact the early ones had a woofer made by another cOmpany not advent! If u go back on eBay tovsold dq 10¡¯s you might find his info? I¡¯ll look So my question remains....does the lack of serials mean anything? Can anyone confirm (not speculate) that these are very early production run units and that serials started later? I have no clue. I bought both my pairs from other people many years ago (moany nI sold my own personally purchased pair before that, so no frame of reference).
I'm not trying to figure out anything bigger with this question. Merely curious and also slightly shocked Dahlquist would initiate production of their flagship product without using serial numbers.
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Mine without serial numbers (neither paper inside nor stamped on back terminal circle) are early because no fuse in back. Earlier - with paper serial number tag inside - it is easy for glue on that tag to come off with age and even if unit never opened up tag can get lost inside. I thought when I first joined this group that someone had a document posted showing production changes and approximate dates, and approximate serial number range, so perhaps you could reverse engineer the date from some of those changes matched to what you have. I know a prominent early change was the woofer.
-----Original Message----- From: w e <sky27709@...> To: [email protected]Sent: Wed, Sep 23, 2020 12:29 pm Subject: [DahlquistSpeakers] DQ-10's with no serial numbers Does anybody own a pair without serial numbers? I do and am curious t find out when they may have been produced (I'm assuming at the begninning of production which would suggest I have a very early pair).
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I can confirm the CTS history as accurate. Learned it firsthand from someone who worked with Carl M. That said, $850 for a pair with original caps and not mirror imaged?seems a stretch. But it is interesting to see the low serials. The story gets a bit more confusing, because if the CTS versions DO have serials and I have a pair with the Advent?woofer (later production) WITHOUT serials...what gives??
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Actually?qstieee I recall you may be correct - there is a tiny sticker on the back of one of the baffles with a number (serial I suspect). Forgot about that!
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Old woofer, SN below 1000 New woofer, SN above 1000
Bulletin No 1: 1973 SN below 200, crossover mod for increased efficiency 3dB
SN beginning 4134, another crossover mod
No other ideas to help date the DQ-10
Paul
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On Sep 23, 2020, at 2:53 PM, Sherman Goldman via < qstieee@...> wrote:
Mine without serial numbers (neither paper inside nor stamped on back terminal circle) are early because no fuse in back. Earlier - with paper serial number tag inside - it is easy for glue on that tag to come off with age and even if unit never opened up tag can get lost inside. I thought when I first joined this group that someone had a document posted showing production changes and approximate dates, and approximate serial number range, so perhaps you could reverse engineer the date from some of those changes matched to what you have. I know a prominent early change was the woofer. -----Original Message----- From: w e < sky27709@...> To: [email protected]Sent: Wed, Sep 23, 2020 12:29 pm Subject: [DahlquistSpeakers] DQ-10's with no serial numbers Does anybody own a pair without serial numbers? I do and am curious t find out when they may have been produced (I'm assuming at the begninning of production which would suggest I have a very early pair).
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I cannot find serial?numbers on the back of mine, but they were on my receipt from when I purchased them somewhere around 1979.? 22221/22220
?
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I was thinking in an earlier mail of what is now in groups.io
/g/DahlquistSpeakers/wiki
Look in the DQ-10 section, perhaps match the rev info to what selected components your DQ-10s have
-----Original Message----- From: roywhittoff@... To: [email protected]Sent: Wed, Sep 23, 2020 3:46 pm Subject: Re: [DahlquistSpeakers] DQ-10's with no serial numbers I cannot find serial?numbers on the back of mine, but they were on my receipt from when I purchased them somewhere around 1979.? 22221/22220
?
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This is what I recall about the early DQ-10's...
The first that I knew about were not mirrored and did not have the Mylar capacitors (the bright yellow ones).? The first I ever saw had the Advent woofers.? I do not recall ever seeing non-Advent woofers except where someone intentionally swapped them out (for whatever reason). After that they upgraded to the Mylar caps but were still not mirrored.? This went on for about 3 or 4 years. Finally you could get them from the factory mirror imaged. Mine are numbers 24091 and 24093, originally purchased in late 1977 or very early 1978.? At this time they had recently switched over to the Mylar capacitors but were not mirror imaged.
I hope that helps.
On Wednesday, September 23, 2020, 12:56:52 PM PDT, Sherman Goldman via groups.io <qstieee@...> wrote:
I was thinking in an earlier mail of what is now in groups.io
/g/DahlquistSpeakers/wiki
Look in the DQ-10 section, perhaps match the rev info to what selected components your DQ-10s have
-----Original Message----- From: roywhittoff@... To: [email protected]Sent: Wed, Sep 23, 2020 3:46 pm Subject: Re: [DahlquistSpeakers] DQ-10's with no serial numbers I cannot find serial?numbers on the back of mine, but they were on my receipt from when I purchased them somewhere around 1979.? 22221/22220
?
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I can add that my original pair (which I bought while in high school) were not mirror imaged?because i remember the instructions they mailed out to do it yourself. This was in winter of 1975. They had the yellow Mexico caps .
On Wed, Sep 23, 2020 at 6:09 PM Michael Bunker < m_bunker@...> wrote:
This is what I recall about the early DQ-10's...
The first that I knew about were not mirrored and did not have the Mylar capacitors (the bright yellow ones).? The first I ever saw had the Advent woofers.? I do not recall ever seeing non-Advent woofers except where someone intentionally swapped them out (for whatever reason). After that they upgraded to the Mylar caps but were still not mirrored.? This went on for about 3 or 4 years. Finally you could get them from the factory mirror imaged. Mine are numbers 24091 and 24093, originally purchased in late 1977 or very early 1978.? At this time they had recently switched over to the Mylar capacitors but were not mirror imaged.
I hope that helps.
On Wednesday, September 23, 2020, 12:56:52 PM PDT, Sherman Goldman via <qstieee= [email protected]> wrote:
I was thinking in an earlier mail of what is now in /g/DahlquistSpeakers/wikiLook in the DQ-10 section, perhaps match the rev info to what selected components your DQ-10s have -----Original Message----- From: roywhittoff@...To: [email protected]Sent: Wed, Sep 23, 2020 3:46 pm Subject: Re: [DahlquistSpeakers] DQ-10's with no serial numbers I cannot find serial?numbers on the back of mine, but they were on my receipt from when I purchased them somewhere around 1979.? 22221/22220
?
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I have a mirror imaged pair but the serial number is not visible.? Where would it be placed?
On Wednesday, September 23, 2020, 06:35:37 p.m. EDT, w e <sky27709@...> wrote:
I can add that my original pair (which I bought while in high school) were not mirror imaged?because i remember the instructions they mailed out to do it yourself. This was in winter of 1975. They had the yellow Mexico caps .
On Wed, Sep 23, 2020 at 6:09 PM Michael Bunker < m_bunker@...> wrote:
This is what I recall about the early DQ-10's...
The first that I knew about were not mirrored and did not have the Mylar capacitors (the bright yellow ones).? The first I ever saw had the Advent woofers.? I do not recall ever seeing non-Advent woofers except where someone intentionally swapped them out (for whatever reason). After that they upgraded to the Mylar caps but were still not mirrored.? This went on for about 3 or 4 years. Finally you could get them from the factory mirror imaged. Mine are numbers 24091 and 24093, originally purchased in late 1977 or very early 1978.? At this time they had recently switched over to the Mylar capacitors but were not mirror imaged.
I hope that helps.
On Wednesday, September 23, 2020, 12:56:52 PM PDT, Sherman Goldman via <qstieee= [email protected]> wrote:
I was thinking in an earlier mail of what is now in /g/DahlquistSpeakers/wikiLook in the DQ-10 section, perhaps match the rev info to what selected components your DQ-10s have -----Original Message----- From: roywhittoff@...To: [email protected]Sent: Wed, Sep 23, 2020 3:46 pm Subject: Re: [DahlquistSpeakers] DQ-10's with no serial numbers I cannot find serial?numbers on the back of mine, but they were on my receipt from when I purchased them somewhere around 1979.? 22221/22220
?
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Mine are without serial numbers and also don't have badges on the front--doesn't seem that there had been badges that had fallen off. Not mirror imaged.
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When I got my pair (1975) the badges were supplied but not affixed. It was up to the owner to apply them? (I suppose because some owners didn't want the badges).
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The serial numbers on mine are on a small sticker on the tweeter baffle (not the super tweeter). See pic. My pair 4884/4885 are from around 1976 (or earlier, I bought them used) and were not mirror imaged. I've attached a pic of (some of ) the original caps.
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SpongeSound
Ed Lindsey
