Zumba J15 build with CD

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y2kindyz
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Location: MISSION, TX

Re: Zumba J15 build with CD

#16 Post by y2kindyz »

I can't see any damage. Here are a few pics

https://flic.kr/p/VPK2ZF
https://flic.kr/p/VPK2qz
https://flic.kr/p/VPK2CP

I can't figure out how to in bed pics

I don't see anything

CoronaOperator
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Joined: Wed Mar 25, 2009 7:07 pm
Location: Medicine Hat, Alberta, Canada

Re: Zumba J15 build with CD

#17 Post by CoronaOperator »

y2kindyz wrote: I can't figure out how to in bed pics
Probably a good thing as this is a PG forum.


:loler: :loler:
Built:
17" width 10" driver Autotuba
2 x 29" width dual Lab12 Tuba60
6 x DR250 2510/asd1001
In progress:
2 x DR250 2510/asd1001
For best results, point the loud end of the array towards the audience

y2kindyz
Posts: 378
Joined: Mon Jan 05, 2009 10:54 am
Location: MISSION, TX

Re: Zumba J15 build with CD

#18 Post by y2kindyz »

CoronaOperator wrote:
y2kindyz wrote: I can't figure out how to in bed pics
Probably a good thing as this is a PG forum.


:loler: :loler:
Definitely keeping it PG
LOL :oops:

:feedback:

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Tom Smit
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Location: Sarnia, Ont. Canada

Re: Zumba J15 build with CD

#19 Post by Tom Smit »

The solder joints for the cap look like they could be redone. I would try that first, just to be sure.
TomS

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Charles Jenkinson
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Location: Manchester, UK

Re: Zumba J15 build with CD

#20 Post by Charles Jenkinson »

Tom Smit wrote:The solder joints for the cap look like they could be redone. I would try that first, just to be sure.
+1

Soldering multi strand copper.wire to the single thicker wires of the components is not easy. I'm no soldering expert, but I've found that an hot iron is best, and to use a bit of molten solder on the tip to help conduct heat into the joint. Also, first tinning each part separately. Doesn't need to be a large contact interface, but the flow of the solder between the adjacent wires of the joint needs to look smooth, or it may be a cold joint. Continuity can be tested with a meter across the joint.
2xJ12L (3012HO) switchable/melded
2xT30

Words&graphics - Audio&Acoustics - Hardware&DSP; 3 different paradigms.

CoronaOperator
Posts: 1648
Joined: Wed Mar 25, 2009 7:07 pm
Location: Medicine Hat, Alberta, Canada

Re: Zumba J15 build with CD

#21 Post by CoronaOperator »

y2kindyz wrote:Swapped to woofer thru the xover, disconnect the woofer and turned up the volume with music and hello clip.

So I am assuming the cap on the xover is the culprit. Is it possible the the inductor is the problem? How can I test the cap?

Thanks in advance,
So you ran the woofer x-over with no woofer attached to it?

That would put your amp into protect mode.

A 2nd order crossover will show a short at the x-over frequency (or some multiple of it) if the resistance of the driver becomes infinite (open circuit). You need to test 2nd order x-overs with a load attached.
Built:
17" width 10" driver Autotuba
2 x 29" width dual Lab12 Tuba60
6 x DR250 2510/asd1001
In progress:
2 x DR250 2510/asd1001
For best results, point the loud end of the array towards the audience

y2kindyz
Posts: 378
Joined: Mon Jan 05, 2009 10:54 am
Location: MISSION, TX

Re: Zumba J15 build with CD

#22 Post by y2kindyz »

CoronaOperator wrote:
So you ran the woofer x-over with no woofer attached to it?

That would put your amp into protect mode.

A 2nd order crossover will show a short at the x-over frequency (or some multiple of it) if the resistance of the driver becomes infinite (open circuit). You need to test 2nd order x-overs with a load attached.
Yes, first I ran it with the CD's disconnected, signal going thru xover, into the woofer. It would clip at different volume levels. I disconnected the woofer and it still clipped. It supprized me because there is was nothing other than the cap between the neg and pos. I didn't expect it to clip. Only thing I figure is the cap shorting intermittently internally. I will try it without the cap connected before I replace it, and report if it stops clipping.

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Bill Fitzmaurice
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Re: Zumba J15 build with CD

#23 Post by Bill Fitzmaurice »

Go back to square one. Run the woofer only, no filter. If it clips the fault is not with the filter. Add just the series inductor. If it's still good add the cap. If it clips then the cap is shorted.

y2kindyz
Posts: 378
Joined: Mon Jan 05, 2009 10:54 am
Location: MISSION, TX

Re: Zumba J15 build with CD

#24 Post by y2kindyz »

Bill Fitzmaurice wrote:Go back to square one. Run the woofer only, no filter. If it clips the fault is not with the filter. Add just the series inductor. If it's still good add the cap. If it clips then the cap is shorted.
Should I run music or 100 hz tone? With the test tone it did not clip, it wasn't until I ran music thru it, it clipped at much lower volume.

Thanks

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Bill Fitzmaurice
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Re: Zumba J15 build with CD

#25 Post by Bill Fitzmaurice »

Music, that's what you use the speaker for.

y2kindyz
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Re: Zumba J15 build with CD

#26 Post by y2kindyz »

Bill Fitzmaurice wrote:Music, that's what you use the speaker for.
Got it. :fingers:

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DJPhatman
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Re: Zumba J15 build with CD

#27 Post by DJPhatman »

y2kindyz wrote:Should I run music or 100 hz tone? With the test tone it did not clip, it wasn't until I ran music thru it, it clipped at much lower volume.
Wait a second.... what are you using for a music source?
I know money often seals the deal, but seriously, quality is an investment, not an expense... Grant Bunter
Accept the fact that airtight and well-braced are more important than pretty on the inside. Bill Fitzmaurice

y2kindyz
Posts: 378
Joined: Mon Jan 05, 2009 10:54 am
Location: MISSION, TX

Re: Zumba J15 build with CD

#28 Post by y2kindyz »

DJPhatman wrote:
y2kindyz wrote:Should I run music or 100 hz tone? With the test tone it did not clip, it wasn't until I ran music thru it, it clipped at much lower volume.
Wait a second.... what are you using for a music source?
Yes, I tried running a tone and it would not clip until I ran music thru it, then it clipped even at low volume.

Bruce Weldy
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Re: Zumba J15 build with CD

#29 Post by Bruce Weldy »

y2kindyz wrote:
DJPhatman wrote:
y2kindyz wrote:Should I run music or 100 hz tone? With the test tone it did not clip, it wasn't until I ran music thru it, it clipped at much lower volume.
Wait a second.... what are you using for a music source?
Yes, I tried running a tone and it would not clip until I ran music thru it, then it clipped even at low volume.
I think he meant, what device? iPad, mixer, etc.

6 - T39 3012LF
4 - OT12 2512
1 - T24
1 - SLA Pro
2 - XF210


"A system with a few knobs set up by someone who knows what they are doing is always better than one with a lot of knobs set up by someone who doesn't."

y2kindyz
Posts: 378
Joined: Mon Jan 05, 2009 10:54 am
Location: MISSION, TX

Re: Zumba J15 build with CD

#30 Post by y2kindyz »

Bruce Weldy wrote:

I think he meant, what device? iPad, mixer, etc.
Oops source would be iPad/Phone - mixer - DBX PA2 - amp.

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