Re: Dahlquist newbie...DQ-10 crossover question.
how about a link to the postings that you made relating to your time at Dahlquist? rgds
Some changes are documented in my .pdf of service materials from when I worked at Dahlquist. They are posted¡
Paul On Sep 4, 2020, at 12:55 PM, Aaron Luebke < luebke5@...> wrote:
Once upon a time there was a document compiled that showed the various changes to the stock components in the DQ-10 crossover.? I think it may have even had serial numbers (if available) in it.? If I remember correctly there were definite changes in those crossovers as the availability of standard capacitor values changed in the market.
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Re: Dahlquist newbie...DQ-10 crossover question.
Have you looked at Erse Audio?? URL: erseaudio.com?? I have found they have some parts that I¡¯ve been unable to find from US suppliers and their pricing is very competitive..? Ed L ?
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From: [email protected] < [email protected]> On Behalf Of Bill Meyerhoff Sent: Friday, September 04, 2020 2:28 PM To: [email protected]Cc: William Meyerhoff <BMeyerhoff@...> Subject: Re: [DahlquistSpeakers] Dahlquist newbie...DQ-10 crossover question. ? You can also take two capacitors and put them in parallel and just add the two of them together. If you need a 5 you take a 2 and a 3 and place them in parallel to get your 5. Bill M
On Sep 4, 2020, at 12:47 PM, Ted Geletka <ted@...> wrote: ? So after spending an hour toggling between Parts Express and Madisound, it's pretty evident exact match uf values for these caps aren't available. ?I am no electrical engineer, so when shopping for
capacitors, if you are looking for a 6.5uf, and available is 6.3 and 6.8 does one select the higher value or the lower value? ?How much deviation from desired uf value is acceptable? ?Madisound has a
Clarity Cap has a 82uf but not an 80uf. ?In a perfect world I'd like to match all the caps from the same manufacturer, but based on what I've seen others have done that's not a big deal.
My DQ-10s' serials are in the 27xxx range, and based on that here are the values I've found:
C1 80.0
C2 16.0
C3 6.5
C4 6.5
C5 6.5
C6 8.5
C7 0.1
C8 0.15?
?
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Re: Dahlquist newbie...DQ-10 crossover question.
You can also take two capacitors and put them in parallel and just add the two of them together. If you need a 5 you take a 2 and a 3 and place them in parallel to get your 5.
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On Sep 4, 2020, at 12:47 PM, Ted Geletka < ted@...> wrote:
So after spending an hour toggling between Parts Express and Madisound, it's pretty evident exact match uf values for these caps aren't available. ?I am no electrical engineer, so when shopping for
capacitors, if you are looking for a 6.5uf, and available is 6.3 and 6.8 does one select the higher value or the lower value? ?How much deviation from desired uf value is acceptable? ?Madisound has a
Clarity Cap has a 82uf but not an 80uf. ?In a perfect world I'd like to match all the caps from the same manufacturer, but based on what I've seen others have done that's not a big deal.
My DQ-10s' serials are in the 27xxx range, and based on that here are the values I've found:
C1 80.0
C2 16.0
C3 6.5
C4 6.5
C5 6.5
C6 8.5
C7 0.1
C8 0.15?
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Re: For DQ10s, what material are you using to stop buzz on rear grills?
9-4-20
I am currently rehabbing a vintage pair of DQ-20 which have a similar metal rear grill and problem.
Original manufacturer applied material was black thin foam rubber ~1/2"wide and 1/16" thick on a cellophane baker tape. Over the years this material ages out, gets hard and crumples off which makes a mess inside the grill area. That's probably why your DQ-10 pair had this material removed.
My plan to solve this same issue is to use the fabric loop half of VELCRO (hook and loop material). The loop portion is the soft carpet-like fabric strip which is self stick. Discard the hook portion of the strip (it is more rigid and the plastic hooks will attract and hold dust). I will be using a heavy duty VELCRO product (see below) which has a thicker/denser loop fabric (than standard Velcro). This should will work well to dampen the metal grill and will not get hard or rot-out over time' and the material is durable enough to be easily brushed, blow with compressed air, and/or vacuumed to clean the dust)
This what I purchased from Home Depot:
VELCRO Brand
Extreme Outdoor All Weather/Rough Surfaces (box claims: "designed to hold 1lbs per square inch; water and UV resistant, professional grade adhesive")
1 Roll? (verify your required lengths - - the DQ-10 speaker box is wider than DQ-20)
10ft roll x 1" wide (you will probably need to trim the 1" wide strip to be 3/4"wide to install it onto DQ wood shelf which holds the metal grill in-place)
Color Black Product # 91843
Good Luck!?
IAKeer irakeer@...
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Re: Dahlquist newbie...DQ-10 crossover question.
Also note from underside images NOT ALL CAPS OR RESISTORS CAN UNSOKDER from board as tied into several hard wires from underneath ! So my solution was to unscrew boards look under and mark those on top! Then I just cut cap wires close to cap ends and spliced in new caps adjusting existing left wires to take new cap wires. In almost all cases I cut the clarity caps wires a lot to make then sit correctly?
Thx, I made room by offsetting the woofer resisters off to side of board on one I used big woofer cap instead of smaller one. Big one has much more head room for 1812 cannons otherwise don¡¯t notice difference .the piezo resisters are a challenge to stack in a tower on one set. The second set I laid them flat and stacked. If u replace the piezo caps ( not worth doing as originals are film caps) you have to offset off board due to size. I didn¡¯t bother on second set as I never hear anything from that driver when testing with bink audio CD which test every freq individually and sweeps . Maybe I can¡¯t hear that high..I use a dB meter and Cd to compare dB of each freq . Write them all dn as go from 20hz to20khz
The reggar caps are not equal to clarity . Richard, I have to complement you on the workmanship on this crossover. I upgraded my DQ-12 with the capacitor kit from Regnar, but it didn't come out looking anywhere near as nice as this. It is a challenge to fit the larger film caps in space used by small caps. Thanks for sharing! Will
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-------- Original message -------- Date: 9/4/20 10:12 AM (GMT-08:00) Subject: Re: [DahlquistSpeakers] Dahlquist newbie...DQ-10 crossover question.
I¡¯m uploading tons of images I original bought 5.6uf but then ordered 6.0¡¯s On Fri, Sep 4, 2020 at 1:07 PM Ted Geletka < ted@...> wrote: I was going by this.? The last two are the same except C3 and C4 were changed from 6.0 to 6.5
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Re: Dahlquist newbie...DQ-10 crossover question.
Thx, I made room by offsetting the woofer resisters off to side of board on one I used big woofer cap instead of smaller one. Big one has much more head room for 1812 cannons otherwise don¡¯t notice difference .the piezo resisters are a challenge to stack in a tower on one set. The second set I laid them flat and stacked. If u replace the piezo caps ( not worth doing as originals are film caps) you have to offset off board due to size. I didn¡¯t bother on second set as I never hear anything from that driver when testing with bink audio CD which test every freq individually and sweeps . Maybe I can¡¯t hear that high..I use a dB meter and Cd to compare dB of each freq . Write them all dn as go from 20hz to20khz
The reggar caps are not equal to clarity .
Richard, I have to complement you on the workmanship on this crossover. I upgraded my DQ-12 with the capacitor kit from Regnar, but it didn't come out looking anywhere near as nice as this. It is a challenge to fit the larger film caps in space used by small caps. Thanks for sharing! Will
Sent from my Galaxy Tab? A
-------- Original message -------- Date: 9/4/20 10:12 AM (GMT-08:00) Subject: Re: [DahlquistSpeakers] Dahlquist newbie...DQ-10 crossover question.
I¡¯m uploading tons of images I original bought 5.6uf but then ordered 6.0¡¯s On Fri, Sep 4, 2020 at 1:07 PM Ted Geletka < ted@...> wrote: I was going by this.? The last two are the same except C3 and C4 were changed from 6.0 to 6.5
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Re: Dahlquist newbie...DQ-10 crossover question.
Richard, I have to complement you on the workmanship on this crossover. I upgraded my DQ-12 with the capacitor kit from Regnar, but it didn't come out looking anywhere near as nice as this. It is a challenge to fit the larger film caps in space used by small caps. Thanks for sharing! Will
Sent from my Galaxy Tab? A
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-------- Original message -------- From: richard adelberg <richardadelberg@...> Date: 9/4/20 10:12 AM (GMT-08:00) Subject: Re: [DahlquistSpeakers] Dahlquist newbie...DQ-10 crossover question.
I¡¯m uploading tons of images I original bought 5.6uf but then ordered 6.0¡¯s On Fri, Sep 4, 2020 at 1:07 PM Ted Geletka < ted@...> wrote: I was going by this.? The last two are the same except C3 and C4 were changed from 6.0 to 6.5
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Re: Dahlquist newbie...DQ-10 crossover question.
Geeze Richard those pictures are going to be so helpful during the rebuild. ?Thanks a bunch.
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Re: Dahlquist newbie...DQ-10 crossover question.
I¡¯m uploading tons of images I original bought 5.6uf but then ordered 6.0¡¯s
On Fri, Sep 4, 2020 at 1:07 PM Ted Geletka < ted@...> wrote: I was going by this.? The last two are the same except C3 and C4 were changed from 6.0 to 6.5
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Re: Dahlquist newbie...DQ-10 crossover question.
I was going by this. ?The last two are the same except C3 and C4 were changed from 6.0 to 6.5
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Re: Dahlquist newbie...DQ-10 crossover question.
Some changes are documented in my .pdf of service materials from when I worked at Dahlquist. They are posted¡
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Show quoted text
On Sep 4, 2020, at 12:55 PM, Aaron Luebke < luebke5@...> wrote:
Once upon a time there was a document compiled that showed the various changes to the stock components in the DQ-10 crossover.? I think it may have even had serial numbers (if available) in it.? If I remember correctly there were definite changes in those crossovers as the availability of standard capacitor values changed in the market.
|
Re: Dahlquist newbie...DQ-10 crossover question.
Once upon a time there was a document compiled that showed the various changes to the stock components in the DQ-10 crossover.? I think it may have even had serial numbers (if available) in it.? If I remember correctly there were definite changes in those crossovers as the availability of standard capacitor values changed in the market.
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Re: Dahlquist newbie...DQ-10 crossover question.
Not all those are 6.5! Read carefully the schematic ! Only two use 6.8! The rest are 6.0! Read the cap 1065& 1060
The 82 makes no audible diff nor does 6.8 it amount to 10-15hz in xo point. I wouldn¡¯t bother with piezo caps as they don¡¯t go bad as film grade.?
On Fri, Sep 4, 2020 at 12:47 PM Ted Geletka < ted@...> wrote: So after spending an hour toggling between Parts Express and Madisound, it's pretty evident exact match uf values for these caps aren't available.? I am no electrical engineer, so when shopping for
capacitors, if you are looking for a 6.5uf, and available is 6.3 and 6.8 does one select the higher value or the lower value?? How much deviation from desired uf value is acceptable?? Madisound has a
Clarity Cap has a 82uf but not an 80uf.? In a perfect world I'd like to match all the caps from the same manufacturer, but based on what I've seen others have done that's not a big deal.
My DQ-10s' serials are in the 27xxx range, and based on that here are the values I've found:
C1 80.0
C2 16.0
C3 6.5
C4 6.5
C5 6.5
C6 8.5
C7 0.1
C8 0.15?
|
Re: Dahlquist newbie...DQ-10 crossover question.
So after spending an hour toggling between Parts Express and Madisound, it's pretty evident exact match uf values for these caps aren't available. ?I am no electrical engineer, so when shopping for
capacitors, if you are looking for a 6.5uf, and available is 6.3 and 6.8 does one select the higher value or the lower value? ?How much deviation from desired uf value is acceptable? ?Madisound has a
Clarity Cap has a 82uf but not an 80uf. ?In a perfect world I'd like to match all the caps from the same manufacturer, but based on what I've seen others have done that's not a big deal.
My DQ-10s' serials are in the 27xxx range, and based on that here are the values I've found:
C1 80.0
C2 16.0
C3 6.5
C4 6.5
C5 6.5
C6 8.5
C7 0.1
C8 0.15?
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Re: For DQ10s, what material are you using to stop buzz on rear grills?
Just arrived home from a week of backpacking to find that Noico automotive sound deadener
that I ordered has arrived.? Our favorite speakers sound best without front or back grills.? Unfortunately
they look best with their front covers on.? Has anyone cut out holes in the metal grill in front of the speakers?
I had been using clay that doesn't harden to reduce grill vibrations.? I will now try these sheets
of sound
deadener appropriately placed out of the way on the front grill.? This may not happen for about a week
as I dig out but my pleasure to report back.?
The grills have a lot of metal in them between the speakers and our ears.? Anyone have other ideas
to reduce interference?
Durs Koenig
Forestville, CA
On 09/03/2020 10:16 PM Nick L via groups.io <nick_lacap@...> wrote:
I've seen some kind of foam strips for window draft treatment at Home Depot that I think would help with your buzzing issues.?
On Thursday, September 3, 2020, 04:47:47 PM PDT, Str8Wire <1jm.reed@...> wrote:
Just wondering if you listen to the DQ10s with the rear grills on? If so, what have you used to eliminate them buzzing?
Thanks in advance for your response!
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Re: For DQ10s, what material are you using to stop buzz on rear grills?
I put some thin self adhesive foam tape all around the wood where the grill screws into place. I can't remember where I got it but it's maybe 1/8" thick and 3/8" wide and came in a roll. However, I've bee blowing tweeter fuses every couple or three months so the grills have been off for a couple of years!
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Re: For DQ10s, what material are you using to stop buzz on rear grills?
I've seen some kind of foam strips for window draft treatment at Home Depot that I think would help with your buzzing issues.?
On Thursday, September 3, 2020, 04:47:47 PM PDT, Str8Wire <1jm.reed@...> wrote:
Just wondering if you listen to the DQ10s with the rear grills on? If so, what have you used to eliminate them buzzing?
Thanks in advance for your response!
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Re: For DQ10s, what material are you using to stop buzz on rear grills?
Thanks for your response. I was asking what someone might have used since my early set does not have anything around the shelf where the grill sits.
So that¡¯s one for felt.
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Re: For DQ10s, what material are you using to stop buzz on rear grills?
Yes with rear grills on.. there is a felt all around the surfaces where grill sits on the bottom ,sides and top.. I play them at 75-90 dbs so I can¡¯t hear any buzzing from the grills
On Thu, Sep 3, 2020 at 7:47 PM Str8Wire < 1jm.reed@...> wrote: Just wondering if you listen to the DQ10s with the rear grills on? If so, what have you used to eliminate them buzzing?
Thanks in advance for your response!
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For DQ10s, what material are you using to stop buzz on rear grills?
Just wondering if you listen to the DQ10s with the rear grills on? If so, what have you used to eliminate them buzzing, if there was no felt or you had to replace it?
Thanks in advance for your response!
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drianhodgson
Ed Lindsey
Bill Meyerhoff
Str8Wire