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Old 5th August 2012, 06:45 PM   #1631
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Default Zobel is there "just in case"..usually, to home use, it is useless

So, you can put whatever you want if your speaker wires are short (less than 5 meters) and if you are not nearby a strong Radio transmitter...less than 100 meters and 100 kilowatts of power.

Yes, you can put it nearest the speaker connector, you can also split it in two parts, one at the pcboard and other at the speaker terminals...this network is there just in case..... you can even supress them substituting with a wire (the coil).

Non magnetic, special resistors, big magic ones does not make any difference..even if you replace with other values...reduce it instead to increase it will be much better...you can install the ones you have...if you have not, them use a wire instead the resistor.

It is there only to local feedback, we are not collecting voltage into these emitter resistor's extremes to trigger V/I circuits (gladly i do not use these ******* things)... this way.... do not worry too much about it...just do not increase the ones..because it is in series with the audio output.... and any resistance in series with the speaker destroys the bass performance.

To be a chicken is a good thing.... the trouble is if you have an adult male **** around.
hehehehehe...will need to put the back bumpers against some wall for protection.

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
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Old 5th August 2012, 06:46 PM   #1632
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Default Zobel is there "just in case"..usually, to home use, it is useless

So, you can put whatever you want if your speaker wires are short (less than 5 meters) and if you are not nearby a strong Radio transmitter...less than 100 meters and 100 kilowatts of power.

Yes, you can put it nearest the speaker connector, you can also split it in two parts, one at the pcboard and other at the speaker terminals...this network is there just in case..... you can even supress them substituting with a wire (the coil).... this filter also helps related the speaker crossover that is reactive..but his is more academic than real in my point of view... i mean...usually this effect does not appear in real world.

Non magnetic, special resistors, big magic ones does not make any difference..even if you replace with other values...reduce it instead to increase it will be much better...you can install the ones you have...if you have not, them use a wire instead the resistor.

It is there only to local feedback, we are not collecting voltage into these emitter resistor's extremes to trigger V/I circuits (gladly i do not use these strange things)... this way.... do not worry too much about it...just do not increase the ones..because it is in series with the audio output.... and any resistance in series with the speaker destroys the bass performance.

To be a chicken is a good thing.... the trouble is if you have a male around.
hehehehehe...will need to put the back bumpers against some wall for protection.

regards,

Carlos
__________________
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; 5th August 2012 at 07:05 PM.
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Old 5th August 2012, 09:45 PM   #1633
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Understood.

Many thanks!
M.
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Old 15th August 2012, 06:23 AM   #1634
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Default The third brazilian group buy orders are now being shipped

126 kits produced, including Audio amplifier pcboard, Supply pcboard, Speaker protector pcboard and delayed insertion pcboard (surge protection).

Zimmer had started because his will to try the Dx Super A without the need to make modifications in his already built amplifier, then he decided to make an entire new one including the Dx Super A circuit (JVC Super A modified by Brazilian Gradiente and adapted by uncle charlie)*

I am glad people are still interested in this amplifier, the most sucessfull Dr. Self project (my opinion considering the units he made, the ones i could listen and test) tuned by ears by myself... some minor modifications that for sure sounded very good.... some modifications would not be entirelly approved by Dr. Self, as i have forced some parts nearby the limit, a non standard solution....Almost all ammount of credit must go to Dr. Self, at the end he created the Blameless design, i have just tweaked.... so, if you understand the amplifier alike a lovely Rolls Royce, uncle charlie made a polish with some wax on it.... and it continues to be a Rolls Royce.

So, now a days, almost 350 kits provided (not 100% sure about this quantity), the majority in Brazil, and some more 70 kits made by home etching by folks that belong to our diyaudio forum.

There are several pirate's producers in Brazil, USA, UK and China....so, i cannot have account of these ones because they are not under my control but i could detect their presence in Ebay and in some other equivalent sites.

I have to thank you all by the confidence and support, it is nice, now older than 60 years old, i can see i could left a nice contribution to all of us....i am now too much busy to take care of amplifiers... i have 3 to 4 years more, working, before the retirement.

Brazil will finally have Spanish language television channels being received in our country.... this is a result of my actions and i am glad we are not only learning English, but also our neighbor's language, as we are surrounded by spanish language people..finally we are getting that, making stronger relations to create a solid block of countries working in close cooperation and able to communicate 100%.

Pictures taken by cell phone... sorry by that.

* Dx Super A and all Dx amplifiers published in this forum, also several videos posted in Youtube.

regards,

Carlos
Attached Images
File Type: jpg Imagem0181.jpg (946.0 KB, 361 views)
File Type: jpg Imagem0183.jpg (802.4 KB, 317 views)
File Type: jpg Imagem0185.jpg (817.2 KB, 299 views)
__________________
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; 15th August 2012 at 06:41 AM.
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Old 15th August 2012, 06:53 AM   #1635
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Default The one made the first pcboard layout that referenced all sequence

Was Todd Johnson (TAJ)...he made the design, next units produced where developments, small modifications made with the intention to improve..some resulted good, others not that good.

Brazilian green board was made by Miguel Nabuco (Mitchel), also the Supercharged blue boards, the multimodel pcboard.

The credit to be the one have created the pcboard goes to Todd Johnson, and my sincere thanks goes to several other guys that improved (Metal, Rudi,Juan Vargas, Mitchel and some others)

regards,

Carlos
Attached Images
File Type: jpg Green Brazilian pcboards to Blame.jpg (448.0 KB, 297 views)
File Type: jpg Dx Blame ST, Supercharged and MKII.jpg (844.8 KB, 269 views)
File Type: jpg Brazilian Blame.jpg (709.0 KB, 133 views)
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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; 15th August 2012 at 06:56 AM.
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Old 15th August 2012, 06:57 AM   #1636
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Default Some more pictures to refresh your memory and to recall reminds to the ones

Belong to the Corporation (the ones have assembled Dx units)

You have the picture from Mitchel (Miguel Nabuco), now a very honored Petrobras men, he passed into tests to work for Petrobrás, the winner in between hundreds of thousands other guys.

Congratulations Nabuco!

regards,

Carlos
Attached Images
File Type: jpg Supercharged multimodel pcboard.jpg (634.7 KB, 159 views)
File Type: jpg Uncle charlie picture.jpg (678.3 KB, 100 views)
File Type: jpg Miguel Nabuco (Mitchel).jpg (45.4 KB, 69 views)
__________________
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; 15th August 2012 at 07:00 AM.
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Old 15th August 2012, 07:09 AM   #1637
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Default Well friends... wife in in Boston, spending uncle charlie

savings.

Build a Dx amplifier folks, despite will not help me about my bank account, will make me less mad about my bank account.... will make me perceive that money is not all that matters in our life.

regards,

Carlos
Attached Images
File Type: jpg Wife in Boston.jpg (66.0 KB, 99 views)
File Type: jpg 01 2nd DX board etched .jpg (205.2 KB, 130 views)
__________________
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; 15th August 2012 at 07:11 AM.
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Old 15th August 2012, 03:47 PM   #1638
Mitchel is offline Mitchel  Brazil
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Hello my good friend Charlie!

Thank you very much for your kind words. It was a pleasure working with you on those projects. We get a long very well, and we seem to have similar points of view regarding PCB layout.

I am slowly going back to electronics, as a hobby, and the DX Blame ST chassis is finally coming to life (I have one with the green boards, but they are not in a nice case). This one is blue boards, and a very nice chassis is being laser cut by a friend.
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Old 18th August 2012, 09:59 PM   #1639
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Talking Dx Blame ST Juan Vargas Style

I was bored to death a decide to make a layout from Dx Blame ST and I'm not sure if I got errors but I will check a couple of times. still waiting on parts so I don't have anything else to do, my car is almost done doing body work and it is a really boring Saturday lol well take care guys!


Regards
Juan
Attached Images
File Type: jpg Dx Blame ST Juan Vargas style.jpg (310.3 KB, 152 views)
Attached Files
File Type: pdf Dx Blame ST v3.LAY Juan Vargas 2.pdf (70.0 KB, 90 views)

Last edited by vargasmongo3435; 18th August 2012 at 10:07 PM.
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Old 5th September 2012, 01:10 PM   #1640
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Quote:
Originally Posted by destroyer X View Post
Belong to the Corporation (the ones have assembled Dx units)

You have the picture from Mitchel (Miguel Nabuco), now a very honored Petrobras men, he passed into tests to work for Petrobrás, the winner in between hundreds of thousands other guys.

Congratulations Nabuco!

regards,

Carlos
Nabuco look like a really smart guy

Regards
Juan
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