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Old 1st July 2013, 08:37 PM   #861
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Location: Recife - Brasil Northeast
Default I am very happy...it is wonderfull

massive... looks huge.

What about the sound... are you satisfied?

regards,

Carlos
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Old 1st July 2013, 08:51 PM   #862
wiljj78 is offline wiljj78  Philippines
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Quote:
Originally Posted by vargasmongo3435 View Post
Very nice bro very nice colorful and sexy amp Carlos will be happy as I'm

Regards
Juan
Thank you very much bro and of course without your worderful layout mine will be nothing.... So you deserve a big thanks from me and everybody who build this amp....

Quote:
Originally Posted by destroyer X View Post
massive... looks huge.

What about the sound... are you satisfied?

regards,

Carlos
Very happy and very satisfying sound my dear uncle charlie...

No hum or hizz, Mid and high are perfect for my taste specially the punchy bass....

A treasure that can be proud to have this kind of lovely amp.

Regards,

Last edited by wiljj78; 1st July 2013 at 09:03 PM.
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Old 2nd July 2013, 12:52 AM   #863
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Originally Posted by wiljj78 View Post
Just to share the beauty of my Super A....

Many thanks and credit to Uncle Charlie.....

Regards,
Very nice, are those Sankens?

How much bias are you running, and do you need to run the fan, even with those large sinks?

Great job!
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Old 2nd July 2013, 07:04 AM   #864
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Default Yep..... a nice sound machine.

My forum is open.... everyone is welcome..... in special Dx Corporation members (the ones build a Dx amplifier)

I am not interested in quantity of people...i want quality.... i will make a personal interview to each one that try to subscribe.

Thank you Bahrain.

regards,

Carlos
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These words sounds alike English..but they are not.. these are words without meaning, just sounds made by humans; https://www.youtube.com/watch?v=_X_7iMHugXM

Last edited by destroyer X; 2nd July 2013 at 07:18 AM.
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Old 2nd July 2013, 08:48 AM   #865
Bigun is offline Bigun  Canada
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Quote:
Originally Posted by destroyer X View Post
My forum is open.... everyone is welcome..... in special Dx Corporation members (the ones build a Dx amplifier)

I am not interested in quantity of people...i want quality.... i will make a personal interview to each one that try to subscribe.

Thank you Bahrain.

regards,

Carlos
I have submitted my registration request. Now I demand my personal interview, at a nice coffee restaurant in Reciffe, overlooking the sea, please send your yacht to pick me up next week
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Old 2nd July 2013, 03:12 PM   #866
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Default For you dear Bigun, i gonna do it!

Inform the kind of company you like..blond, brunette, tall...and i will manage to provide you confort, they will stay with us.

In the yach off course.

It is raining cats and dogs outside dear Bigun...i hope you delay to arrive...this month rains a lot here..and temperature is freezzin 22 degrées celsius.

Girls are busy.... they are on strike against government.

regards,

Carlos
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Old 2nd July 2013, 03:15 PM   #867
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Default Dx Super A - Brasilian pcboards - starting to assemble

Dx Super A - Brasil - Começando a montar - YouTube

There are some comments in English too.

regards,

Carlos
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Old 4th July 2013, 01:17 AM   #868
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Default Parts in place..... not finished yet

The coil in the supply rail is missed, some parts and jumpers.

These are Brazilian pcboards...all sold..no one left.

Juan pcboards are better, these ones where made very fast, based into a Brazilian Dx Blame ST green pcboards.

regards,

Carlos
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File Type: jpg 004.jpg (570.2 KB, 114 views)
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Old 4th July 2013, 06:20 AM   #869
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Default Always install fuses in series in the output

This is to protect the speaker if your transistors is shorted....if positive rail power transistor (a single one) is shorted, or fried, then you will have positive rail voltage going to the speaker coil..this may burn the coil....then the fuse will burn protecting the speaker coil

Sometimes the coil goes shorted, burned, fried and filled with carbon...the coil insulation is burned and the coil impedance drop to zero ohms, a dead short that will melt your power transistors...so....this time is to protect the amplifiers.

Use 4A fuses to 8 ohms speakers
Use 8A fuses to 4 ohms speakers
Use 15A fuses to 2 ohms speakers

You may think the supply fuse will do the job....no!...it may not do it, as it is calculated to higher current, that may be two channels added maximum peak current.

You may believe the power amplifier rail fuses will do the job..... maybe not, they are calculated to the consumption and not the audio...they are very big.

Speaker fuses use to be lower in Ampere ratio and also high speed fuses...fast blow fuses.

I strongly suggest you to do this way....Juan faced troubles because a shorted speaker... i hope you will work at the safe side.

Power transistors loss is frustrating, generates some work to repair, sometimes destroy precious speakers.... fuses use to be cheap...use them.

See video below, they show fuses being draw by Juan Vargas Diaz...this may help as a sugestion to your procedure.

regards,

Carlos

The speaker wire were short out on the Nippon America woofers - YouTube

Fuse in the ouput good save precaution - YouTube
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These words sounds alike English..but they are not.. these are words without meaning, just sounds made by humans; https://www.youtube.com/watch?v=_X_7iMHugXM

Last edited by destroyer X; 4th July 2013 at 06:34 AM.
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Old 4th July 2013, 10:03 AM   #870
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Default Dx Super A - Brasil

regards,

Carlos
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