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Old 3rd December 2012, 10:12 AM   #301
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Default Here you have the adjustment setup

You may have this protective series resistor on board, or maybe not...we are still thinking about it, as people may burn the fiberglass with some kind of misadjustment or errors into the circuit board assembly... fuse socket is to be installed on board..but resistor may be outside, in between the supply pcboard and the power amplifier pcboard.... installed to adjust and them removed.

Image attached,

regards,

Carlos
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File Type: jpg Protective series resistor.jpg (900.9 KB, 420 views)
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Last edited by destroyer X; 3rd December 2012 at 10:15 AM.
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Old 3rd December 2012, 10:59 AM   #302
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Default This resistor watt rate is an overkill

2.5 volts over 10 ohms, means 250mA and this result in 625mW

But 5.0 volts means 500mA and this result in 2.5W

If people try 700mA, then the voltage drop will b 7 volts... results in 5W

But if people make mistakes into the amplifier constrution, shorts and things alike, misadjustment into the bias trimpot..them the current can be several amperes and even the 10 watts resistor will smoke.

This watt ratio will be good to the tweakers...for sure they gonna try 1 Ampere, they will regret and will return to 0.25A

The VBE multiplier working as heat sensor is unable to compensate when the heatsink is too much hot.... so.... with huge dissipation of 60 watts each rail or more, the heatsink will be so hot the transistor will not be able to reduce in the ammount we need....this way...or you use small current or you install dual super fan blowers and giant heatsink and install this devil machine (hot) over a block of Ice in Siberia or Sweden.

Big mistakes will smoke protective resistors anyway...well....they are there for this reason.... to avoid excessive current into the circuit board and to burn opening the circuit alike a fusistor.

regards,

Carlos
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Old 3rd December 2012, 02:10 PM   #303
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Here is the last image of the board the update was made last night at midnight "local time in Puerto Rico" I send the new files to the engineers so a they can begin the order.


Regards
Juan
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File Type: jpg Dx Super A 5.jpg (447.9 KB, 377 views)
File Type: png Dx Super A 5 bottom.png (880.4 KB, 339 views)
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Old 3rd December 2012, 04:32 PM   #304
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Default A much more realistic image from Juan Vargas

Thank you Juan.

Why the left multimeter black cable is cutted?

jejejeje!...means ahahahahah! in spanish.

regards,

Carlos
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File Type: jpg This one...thanks!.jpg (410.6 KB, 320 views)
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Old 3rd December 2012, 04:38 PM   #305
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Default Your left multimeter will not read...because no black cable

The one at post 304 is defective.

OhohohohohŰh!

regards,

Carlos
Attached Images
File Type: jpg OhohohohŰh!.jpg (223.8 KB, 303 views)
File Type: jpg Jejejejejeje.jpg (227.3 KB, 88 views)
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Last edited by destroyer X; 3rd December 2012 at 04:44 PM.
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Old 3rd December 2012, 05:04 PM   #306
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hahahahahahahahahahah que loco !!!


Regards
Juan
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Old 3rd December 2012, 05:40 PM   #307
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Default Mucho loco gracias a Dios!... very crazy thanks God

If i was not crazy, how could i tollerate some guys we have around in our forum (10 guys)

If i was not crazy i would not take all my free time to create, develop, build, design, test and torture amplifiers.

If i was not crazy no way to help layout designers to follow "Corporation" rules.

If i was not crazy no tenths of amplifier produced for free.

If not crazy 1000 guys would not have the pleasure to make their own audio power amplifier... with their own hands...in their own house.

Thanks God uncle charlie is idiot, and crazy!

regards,

Carlos
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Old 3rd December 2012, 06:49 PM   #308
Bigun is offline Bigun  Canada
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Crazy? very likely

Idiot? I don't think so :-)
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Old 3rd December 2012, 08:42 PM   #309
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Default Thank you Bigun...you are a friend... reason why you use to give

me some "discount" in your evaluations.

This is the final comment about the Dx Super A.... adjustment and how the circuit goes operating...thermal issues, thermal drift, what we can do..what we cannot do.

I hope you enjoy

Dx Super A adjustment - YouTube

Please subscribe to Carlos Mergulh„o in the Youtube..this helps me to attract more guys to build my amplifiers..the more subscribers the more guys comes to see my videos...please click into like, the fingers up image...and leave a comment if you want.

Sorry, i have heard and i could see my english is not good....but it is the best i can do.

regards,

Carlos
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Old 3rd December 2012, 08:57 PM   #310
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Default Humans are lovely

Creativity and ingenuity... these thingas applied to audio electronics will bring wonders to our lives.

regards,

Carlos
Attached Images
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