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Old 27th November 2012, 05:22 PM   #1421
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Default Thank you folks...i did it...i have not assembled to test

but for sure will work fine.

Here you have the new schematic...the same as the old one with some values tweaked...the stand by current is 50 miliamperes to each power transistor, and this is optimized..the total dissipation in stand by mode is 40 watts... very hot...well..you decide if you want all that heat.

Distortion is fine and the ratio from the second to the third harmonic is very good..sensitivity was very reduces and compensation capacitor increased.

Green circled parts are the ones to be modified..trimpot remain mid way but use these power transistors shown..do not try others.... all rigth..the output ones you can change... also the vbe multiplier can be changed but this will result in errors in the base to emitter resistors that you gonna have to be tweaking in a try and error basis till you fix that..so..not a good idea to be searching for troubles.

Be happy... something that was already very good, not it is much more than very good.

Please boys.... do not mess with uncle charlie..i am a hell busy producing the Dx Zim SMPS supply the Kraftwerke..... also making the mini MAKO (400 watts each channel) to go together with that supply..... do your part of the game and let uncle charlie free to work, do not go sending me emails asking more time from your almost dead uncle.

regards,

Carlos
Attached Images
File Type: jpg Dx Blame MKIII Hx - revisited Nov. 2012.jpg (495.8 KB, 230 views)
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Dx Blame ST with a tube preamp. recorded with Xperia cell phone, https://www.youtube.com/watch?v=Qjs32J0gdj0; https://www.youtube.com/watch?v=nhrZ...vDnDhEpNv_XVxg

Last edited by destroyer X; 27th November 2012 at 05:26 PM.
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Old 27th November 2012, 05:56 PM   #1422
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Default Please, the first one to make it do it one channel only to compare

and please, let me know what you think about... real criticism...with no pain...is it better or not?

I would love to build, or to modify the Blame i have...but is i am soooooo busy!

wiljj78 .... will you make it?.... thank you dear "bahrain"

Invitation to you here:

http://www.youtube.com/watch?v=8VMxj380J98

regards,

Carlos
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Dx Blame ST with a tube preamp. recorded with Xperia cell phone, https://www.youtube.com/watch?v=Qjs32J0gdj0; https://www.youtube.com/watch?v=nhrZ...vDnDhEpNv_XVxg

Last edited by destroyer X; 27th November 2012 at 06:11 PM.
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Old 27th November 2012, 07:13 PM   #1423
wiljj78 is offline wiljj78  Philippines
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Quote:
Originally Posted by destroyer X View Post
and please, let me know what you think about... real criticism...with no pain...is it better or not?

I would love to build, or to modify the Blame i have...but is i am soooooo busy!

wiljj78 .... will you make it?.... thank you dear "bahrain"

Invitation to you here:

Invitation to Bahrein - YouTube

regards,

Carlos


Uncle Charlie you really looks like real Bahraini Hahahahaha...

Thank you for the invitation and YES... for sure i will make the new modification and revert back to you.

Thank you sooo much...

Regards,
Willy
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Old 27th November 2012, 09:30 PM   #1424
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Default Very good...this helps me a lot.

regards,


Carlos
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Dx Blame ST with a tube preamp. recorded with Xperia cell phone, https://www.youtube.com/watch?v=Qjs32J0gdj0; https://www.youtube.com/watch?v=nhrZ...vDnDhEpNv_XVxg
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Old 28th November 2012, 02:16 AM   #1425
Bigun is offline Bigun  Canada
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Carlos,

The design in post 1 shows your interesting current source arrangement for the VAS. You have a transistor current source feeding the VAS from the +ve rail and then you have a boostrap pair of resistors between the CCS and the VAS collector.

How does this change the sound compared with plane transistor CCS only, and with bootstrap only ?
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Old 28th November 2012, 04:25 AM   #1426
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Default I have perceived more punch only

The overall sound looks the same, but the speaker started to move by itself when it was not moving from it's steady point before.

I cannot explain your theoretical things dear Bigun, not only i am not addicted but also i dislike the fact that i know some theories... something i curse on myself is this knowledge.... the ones knows, do not know sonic results...and this means nothing.... say.... have not value as do not help them to make good amplifiers.

In my country we have a say about things we dislike.

- "Eu não sei e tenho raiva de quem sabe" ... but i do think you cannot understand the "range" of that.... this talks about something that is not useless but less usefull.... means "i do not know and i do not want to know or learn"

I do not know and i feel angry about the ones have this knowledge...ahahahahah!... this means the most apocalypt aversion to theories.... i do feel good when i have experiences alike i had in that amplifier.... results obtained while burning my fingers into the workbench.

The ones had the knowledge about theories have bothered me too much when i was young dear Bigun.... circuit assembled from magazine used not to work, some exploded and i had not the knowledge to understand what happened...then i use to write to the designers or to the magazine writers asking for help and they used to snob me because i was "too much young to understand".... alike Hitler that had a strong hate due to things happened in his young days, i do hate these folks till the present days.... they are all dead and i hope they are burning in hell.

Last time answering such kind of questions dear Bigun...this is no good...this just attracts people to bother or they use this as an opportunity to vomit theories here, trying to show they are skilled and good..when i do think they are not one nor other.

You are a very good friend..but next time i will ignore the question.

The good answer...without the combination, or only the CCS, the speaker have not moved from it's stand point...with the combination the speaker moved.... Now you can infer acceleration or amplitude or effect used by the Japanese to test bridges, the balance, the alternation of moves symmetrically perfect.

I am much more inspiration and perspiration than theories dear Bigun... i do discover things while working...say..this results this way or that way...and i do understand the subject related the "kind" of sonics it produces.... you know, it is alike to tune your guitar by ear.... people play and you detect it is out of tune, but you cannot say the string is untuned.... or which particular element is untuned.

I am sorry to say your question will not help you...say...the answer will not help you..... the only help is to tweak and listen and understand the result while listening...it is a sensorial (sensory) thing dear Bigun.

Watching a schematic i can perceive the sound results of sub circuits and values because thousands built... also i can see electrons flow, this appear alike more speed where you have more current and the oposite when you have less current.... this is the kind of "vision" i have developed along these years.... i do use ohms law only and the formula to calculate capacitors... these are usefull things i use everyday.

Speaker move means the enclosure does not stand still in the spatial position you had set before..it moves due to vibrations

regards,

Carlos
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Dx Blame ST with a tube preamp. recorded with Xperia cell phone, https://www.youtube.com/watch?v=Qjs32J0gdj0; https://www.youtube.com/watch?v=nhrZ...vDnDhEpNv_XVxg

Last edited by destroyer X; 28th November 2012 at 04:37 AM.
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Old 28th November 2012, 09:39 PM   #1427
a.wayne is offline a.wayne  United States
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Quote:
Originally Posted by destroyer X View Post
The overall sound looks the same, but the speaker started to move by itself when it was not moving from it's steady point before.

Carlos
Carlos what do you mean by this , are you saying the speaker moved because of the offset..?
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Old 28th November 2012, 10:48 PM   #1428
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Default The full speaker enclosure... the entire box moved

Changed position...was alike "walking away" because of power...you know..you put it 10 inches from back wall and then it is 9 inches

Got it man?

I have some troubles with English...sorry.

Carlos
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Dx Blame ST with a tube preamp. recorded with Xperia cell phone, https://www.youtube.com/watch?v=Qjs32J0gdj0; https://www.youtube.com/watch?v=nhrZ...vDnDhEpNv_XVxg
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Old 28th November 2012, 10:58 PM   #1429
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Default Here google translator as i do not have the words to describe

The speaker moves ... it glides over the ground as a result of strong vibrations caused by power

Carlos
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Dx Blame ST with a tube preamp. recorded with Xperia cell phone, https://www.youtube.com/watch?v=Qjs32J0gdj0; https://www.youtube.com/watch?v=nhrZ...vDnDhEpNv_XVxg
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Old 28th November 2012, 11:26 PM   #1430
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Default Beautiful construction of an amplifier

Very pretty... i use this image as advertisement into Brasil.... this way people will be interested to build.

regards,

Carlos
Attached Images
File Type: jpg Foto do MKIII Hx.jpg (336.9 KB, 161 views)
__________________
Dx Blame ST with a tube preamp. recorded with Xperia cell phone, https://www.youtube.com/watch?v=Qjs32J0gdj0; https://www.youtube.com/watch?v=nhrZ...vDnDhEpNv_XVxg
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