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Old 12th October 2004, 10:26 AM   #1
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Default Brazilian amplifiers schematics, mobile power units

We have "Season Carnival".....out of time Carnival parties in some cities, Friday nigth and Saturday nigth street parties.

Power amplifiers are mounted over big trucks, and those mobil units have all the needed equipmento to make one mobile power orchestra....musicians and all kind of instruments, not only acoustic but also electronic aids, mixers and all stuff.

Some of them use 20 Kilowatt of electric power, the energy comes form generators moved by big Diesel MWM motors.

I will put some adresses where you can find brazilian amplifiers schematics and some "electric trio" informations.

Will also put some schematics and some pictures, if you want to see more, go to the links.

www.audiorama.com.br/nashville

www.triopadilhao.com.br/equipamentos.htm

http://planeta.terra.com.br/educacao...ificadores.htm

regards,

Carlos
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File Type: jpg gradiente 1450.jpg (89.2 KB, 268 views)
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Power supply; ripple, filter, noise, stability and the use of capacitance multiplier... Portuguese and English; https://www.youtube.com/watch?v=sSm0ku1eIgg
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Old 12th October 2004, 10:30 AM   #2
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Default 5 Kilowatts, class H, power audio amplifier

You will find this "monster" power machine in one of the adresses i wrote.

You will find complete zipped schematics, 354K size

regards,

Carlos
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Power supply; ripple, filter, noise, stability and the use of capacitance multiplier... Portuguese and English; https://www.youtube.com/watch?v=sSm0ku1eIgg
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Old 12th October 2004, 10:32 AM   #3
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Default Electric trio, the mobile unit picture

A picture, you can have more, follow the links and enjoy yourself

regards,

Carlos
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File Type: jpg electric trio.jpg (22.3 KB, 230 views)
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Power supply; ripple, filter, noise, stability and the use of capacitance multiplier... Portuguese and English; https://www.youtube.com/watch?v=sSm0ku1eIgg
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Old 12th October 2004, 10:35 AM   #4
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Default Nashville power amplifier is the most famous here

The one is the small brother, have not too much power, 200 RMS more or less, and is already used to professional applications, can give more power over 4 ohms charge and have "bigger brothers" too.

This one, the Nashville 2200 was made in the seventies, and used till our days.

regards,

Carlos
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File Type: jpg nashville 2200 - a.jpg (75.4 KB, 296 views)
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Power supply; ripple, filter, noise, stability and the use of capacitance multiplier... Portuguese and English; https://www.youtube.com/watch?v=sSm0ku1eIgg
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Old 12th October 2004, 10:39 AM   #5
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Default This amplifier, the Nashville 2200 i strongly suggest to you, but have to say

Have the same loss of deep bass that i found in Marshall Leach Amplifiers.

Of course without changes, the original Leach schematic.

All country thinks this is a very good amplifier, used from North to South as a reliable and good sounding amplifier.

Take into your account that is a seventies design, this way, very old thopology, but working good.

regards,

Carlos
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File Type: jpg nashville 2200 - b.jpg (92.7 KB, 256 views)
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Power supply; ripple, filter, noise, stability and the use of capacitance multiplier... Portuguese and English; https://www.youtube.com/watch?v=sSm0ku1eIgg
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Old 12th October 2004, 10:42 AM   #6
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Default Here some Nashville specifications...hehe...not so precise!

I will put some "factory" specifications..... hehe..... not precise.

regards,

Carlos
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File Type: jpg nashville spec..jpg (69.0 KB, 232 views)
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Power supply; ripple, filter, noise, stability and the use of capacitance multiplier... Portuguese and English; https://www.youtube.com/watch?v=sSm0ku1eIgg
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Old 12th October 2004, 10:47 AM   #7
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Default Gradiente is another famous brand here, started in the sixties

Many models made.... and millions sold.

First designs used RCA 2n3055 and electrolitic condenser in the output, power was 18W rms and used a non simetrica supply.

45 DC volts were used..... and bigger brother were made.


I already shown you the 1970 model...the 1450, and will show you now the last Professional model, this one was used inside homes too.

The Gradiente HII is considered a very good amplifier.

I will show you one image and the schematic in three parts.

regards,

Carlos
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File Type: jpg gradiente hii.jpg (94.2 KB, 191 views)
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Power supply; ripple, filter, noise, stability and the use of capacitance multiplier... Portuguese and English; https://www.youtube.com/watch?v=sSm0ku1eIgg
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Old 12th October 2004, 10:50 AM   #8
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Default If you upgrade something will be perfect!

One model, do not remember if this one, used ua741.

Of course, the replacement will be very good as update.

regards,

Carlos
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File Type: gif gradiente hii - a.gif (95.5 KB, 223 views)
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Old 12th October 2004, 11:05 AM   #9
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Default Brazilian music have a lot of percursion

So, drum and bass must appear clearly.

People say here that the bass must be alike a punch in the stomach, and also must move the leg's hairs...if not...trash!!!

regards,

Carlos
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File Type: jpg gradiente hii - b.jpg (92.9 KB, 206 views)
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Power supply; ripple, filter, noise, stability and the use of capacitance multiplier... Portuguese and English; https://www.youtube.com/watch?v=sSm0ku1eIgg
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Old 12th October 2004, 11:08 AM   #10
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Default You can find other good brands following the links, i will finish because bandwidth

The last part of Gradiente HII

This amplifier have a very pleasant reproduction.


Also you will find other brands, alike Polivox, Staner,Machine,and many others.

Go there, visit us...you are welcome guys!

regards,

Carlos
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