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Old 19th July 2009, 09:04 AM   #1
Stee is offline Stee  Italy
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Default Isy Project

Hi
my last project is a double stage
classical tension and current gain

but using with the same devices
to compense different gain of PNP and NPN
inside single rail
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Old 19th July 2009, 09:51 AM   #2
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Old 19th July 2009, 11:09 AM   #3
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Quote:
Originally posted by fjr

fjr you`re jealous of his great idea!!

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Old 19th July 2009, 11:51 AM   #4
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Default Good work Stee..send to uncle charlie the values


the complete schematic....nice amplifier.

Yes..i can calculate..but why to do that if you already made for me?

Clever, as you always used to be..automatic bias set by diodes forward voltage drop...NTC thermal compensation is great too...the input differential having more current than normal, using BD139/140 is another excelent idea..gain is 200 and ft is very high...more than 100 Megahertz.... the audio quality (high end) will depend the two lag compensation diodes.

You use to send shame on us.... we use to go doing the same old song..and you come with different circuits.....old of course, but different.... you are creative...and this bothers the ones are not...soon you gonna have a couple of idiots bothering you.

Listen Stee amplifier eating Dx Pizza!... the only pizza is guaranteed!

panzertoo@yahoo.com


Carlos


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Old 19th July 2009, 12:02 PM   #5
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Default Stee amp. seems that sounds so good as Dx pizza tastes good


Enjoy both of them.

Viva la Itália..siammo tutti fratelli!

Carlos
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Old 19th July 2009, 03:39 PM   #6
Stee is offline Stee  Italy
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Default this wonderful idea

thanks uncle charlie !
you're always very kind

unfortunately are not able to use the simulator
then I have not calculated the values of resistors ...

I only designed the layout of components on the radiator

can you help me?
I offer "four seasons" pizza original from Naples

(remeber the important feature is using the same family in each stage)

read more about this new concept of "natural gain compensation" on:
http://www.esafono.it/START.htm

BD139/140 are better then 2SB631/2SD600?
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Old 19th July 2009, 06:25 PM   #7
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Default Yessss... when we multiply the gain, drivers gain multiplied by output gain


then we have a value...and this value is the same into the positive rail compared to the negative rail.

Not doing this way..what happens?

The PNP is usually higher gain compared to the NPN counterpart...so....you gonna have 8100 or gain into the negative rail...and 2025 of gain into the positive rail...this will produce assymetrical wave.... some folks loves that, they say this produces distortion alike electron tubes.... well....i do not think so...

This is the reason why i loved that amplifier!

Thank you Stefano!

And to the ones does not know...Italian people do not only knows hot to make love..and how to make pizza..they know a lot of other things, as amplifiers and several discoveries made into the ancient Italy (Da Vinci)...so... respect those "fratelli", as inside the skull, usually has a very good brain..so good as ours, and sometimes better.

Carlos
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Old 19th July 2009, 06:34 PM   #8
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Default I promiss you secret about that...if you want to keep that non published


then send me the schematic with parts written above the papper.

Also if you have boards..send me just one..inside an envelope..nothing more than a single board (customs are awfull here).... i said..ONE board only..this increases the chances to reach my place in 10 days.... if you filled the package with parts and two boards will be blocked into customs..they will ask me to pay..i will say no!.. then they will keep there for year or two and them will send me 2 years latter..those son of a .....big bureaucracy!

And write into the envelope.



Carissimo Fratello Carlo.... ahahahahah!

Rua Dona Balbina Menelau 56 - 1601

Candeias - Jaboatão dos Guararapes

Pernambuco - Brasil

South America

54440-615


Your boards will not be copied, will not be sold, will not be shown, will not be photographed in details, pictures made will not have resolution to allow bad guys to copy (clone) and will not tell the values.... also will publish in this forum something about (real truth...if bad i gonna smash your amplifier..but i do not believe in such kind of things watching the schematic..i can even perceive the sound watching it...old guy..thousands made!)

If you do not send me schematic with parts values printed..then i will calculate by myself..and will make my own decisions about..this may result in different amplifier than yours.... and i will talk about "another" amplifier, as some hard modifications i may do may turn it a little bit different ,...but will not lost the sonic character at all because sound depends on topologie in first place..topologie in second place, topologie in third place, currents in fourth place and parts in fifth place

arrivederci

Carlos
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Old 19th July 2009, 06:44 PM   #9
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Default I will simulate...despite this says nothing about quality..just nice numbers


But... shows when something is really wrong..not your case, for sure.

I see you have no secret....then i am able to study..thank you very much.

Board by mail will be interesting.... health does not help me to be sitted long time producing boards anymore.

regards,

Carlos

.................................................. .................................................. ...

I could see teenagers in our forum behaving without respect to Stee... the name is small...but he is a big man.... wise man..with papers published into the internet.... respect is good fellows... this happened other thread...i am happy he forgive those things and returned for us.

Il cane abbaia, come ad abbaiare quando la macchina munita di un uomo importante seguire il tuo percorso

Dogs barks when the carriage passes transporting the important man.
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Old 19th July 2009, 06:58 PM   #10
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Default Next time you have a nice baked steak...


Remember Italy, in special Milan...as this food was first used in Milan.... Milanese Steak.... bife à Milanesa.

The one has cheese and tomato souce is from Parma... parmeggianni.

So.... there a culture exists.... the ancient Rome.

Watch that and respect the guy!

regards,

Carlos
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