Here the last audio recording from the Dx Blame ES
Recorded using electret condenser microphone.
live recording, not a line recording, music entered the amplifier and i made recording with the microphone only, not microphone mixed with line.
YouTube - Dx Blame ES, just the best from the best!.mpg
regards,
Carlos
Recorded using electret condenser microphone.
live recording, not a line recording, music entered the amplifier and i made recording with the microphone only, not microphone mixed with line.
YouTube - Dx Blame ES, just the best from the best!.mpg
regards,
Carlos
THANK YOU Mr Carlos
IT IS PLAYING NOW ..
WHAT A MONSTER AMP
THANK YOU Mr Carlos .
soon will post some pics of the assembled amp .
the PCB ( low quality ) .
IT IS PLAYING NOW ..
WHAT A MONSTER AMP
THANK YOU Mr Carlos .
soon will post some pics of the assembled amp .
the PCB ( low quality ) .
Attachments
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Yeah dear Funky2x the unit plays really super loud..it is almost unbelievable
and it is surprising me also, when people comes to listen here at my home and i increase the volume i felt surprised, seems louder than my small 55 volts DHR Turbo, my home edition made to match a transformer i had here rolling inside a junk box.
Loud!... really crazy loud!... with a lot of details, crispy treble, wonderfull focus, marvellous dinamics, super precise (AND SHY) bass, interesting sound stage, noiseless power on..... hyper super maximus besten quality sonics.
GIve a try, increase your input condenser if you want a little bit more bass, install 33uf plus 33uf in series, so, result will be 16.5uf ..... better is to install two big monsters, non polarized MKP 10uf, and you have place to do that over the board and you can solder the other one bellow (under) the board.
Next week i will tweak the one for bass, i am having some repairs at my home plumbing, and now a days too much dirty here to work with this lovely amplifier, he deserves a clean and very honored place to be playing.
Thank you very much dear Funky2X, your picture is wanted for the Dx crew, hall of fame, Dx Headquarters.
All pictures will be very welcome, do not want to reduce them, or crop them, or resize them...so, send them to uncle Charlie.
carlos.eugenio1951@yahoo.com
About personal pictures, with your face, tell me if can publish or not..i will respect that.
YouTube - Dx Blame ES, just the best from the best!.mpg
regards,
Carlos
and it is surprising me also, when people comes to listen here at my home and i increase the volume i felt surprised, seems louder than my small 55 volts DHR Turbo, my home edition made to match a transformer i had here rolling inside a junk box.
Loud!... really crazy loud!... with a lot of details, crispy treble, wonderfull focus, marvellous dinamics, super precise (AND SHY) bass, interesting sound stage, noiseless power on..... hyper super maximus besten quality sonics.
GIve a try, increase your input condenser if you want a little bit more bass, install 33uf plus 33uf in series, so, result will be 16.5uf ..... better is to install two big monsters, non polarized MKP 10uf, and you have place to do that over the board and you can solder the other one bellow (under) the board.
Next week i will tweak the one for bass, i am having some repairs at my home plumbing, and now a days too much dirty here to work with this lovely amplifier, he deserves a clean and very honored place to be playing.
Thank you very much dear Funky2X, your picture is wanted for the Dx crew, hall of fame, Dx Headquarters.
All pictures will be very welcome, do not want to reduce them, or crop them, or resize them...so, send them to uncle Charlie.
carlos.eugenio1951@yahoo.com
About personal pictures, with your face, tell me if can publish or not..i will respect that.
YouTube - Dx Blame ES, just the best from the best!.mpg
regards,
Carlos
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There's a heavy metal club in Bagdad, i now you're from Syria
I could see, yesterday, at the Discovery Channel, this Iraq group of guys, half shaved and using black shirts (inside the club only) singing and dancing a nice deep hell heavy metal groove rock.
Was nice to see, was good to see people enjoying the same thing, even in a town that was invaded.
I would like to see them happy with this amplifier playing there..plays loud, reproduces this sound from the throat very well, also the metals ...the unit plays very loud for it's power...surprises me always.
Another amplifier that do that is the Symassym, the original model, when people started to produce several versions then i lost my interest to try.... i love original things and i dislike when people go modifying a little bit to show themselves.... yeah, this brings evolution to the amplifier, i know that, but even knowing i do not like a lot of units, almost the same, rolling in our fanatic forum..i would be more happy with a variety, several options, all different, offered to our folks.
regards,
Carlos
I could see, yesterday, at the Discovery Channel, this Iraq group of guys, half shaved and using black shirts (inside the club only) singing and dancing a nice deep hell heavy metal groove rock.
Was nice to see, was good to see people enjoying the same thing, even in a town that was invaded.
I would like to see them happy with this amplifier playing there..plays loud, reproduces this sound from the throat very well, also the metals ...the unit plays very loud for it's power...surprises me always.
Another amplifier that do that is the Symassym, the original model, when people started to produce several versions then i lost my interest to try.... i love original things and i dislike when people go modifying a little bit to show themselves.... yeah, this brings evolution to the amplifier, i know that, but even knowing i do not like a lot of units, almost the same, rolling in our fanatic forum..i would be more happy with a variety, several options, all different, offered to our folks.
regards,
Carlos
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A local audiomaniac friend insisted to me to make some modifications
I said this would not result fine...but he insisted so much that i decide to satisfy his needs.
He said i should increase the bootstrapp condenser, i said 47uf is more than excelent there, i told if i increase result would be sound less precise, less defined.... and this happened exaclty this way.
He asked me to increase a lot the input condenser...ahahahha, almost 10 times...i said this would filter the treble, as this condenser, the input, is in a series patch to ground... input resistance, then the condenser, then the input base to ground resistance...this is a hell filter..... he insisted...i have made.... awfull!... treble high end gone, lost all brigth.
Increase your input condenser maximum to 20uf, better to use bipolar... or some MKP or good quality unit (Big...very big!)
I will revert that.... with these modifications the amplifier lost a lot of audio quality...the unit was assassinated....hehehehe...of course the bass increased a little, but this way we are paying very much having so bad precision in sonics and this shy treble.
Will return to the way it was.... respecting the schematic.
regards,
Carlos
I said this would not result fine...but he insisted so much that i decide to satisfy his needs.
He said i should increase the bootstrapp condenser, i said 47uf is more than excelent there, i told if i increase result would be sound less precise, less defined.... and this happened exaclty this way.
He asked me to increase a lot the input condenser...ahahahha, almost 10 times...i said this would filter the treble, as this condenser, the input, is in a series patch to ground... input resistance, then the condenser, then the input base to ground resistance...this is a hell filter..... he insisted...i have made.... awfull!... treble high end gone, lost all brigth.
Increase your input condenser maximum to 20uf, better to use bipolar... or some MKP or good quality unit (Big...very big!)
I will revert that.... with these modifications the amplifier lost a lot of audio quality...the unit was assassinated....hehehehe...of course the bass increased a little, but this way we are paying very much having so bad precision in sonics and this shy treble.
Will return to the way it was.... respecting the schematic.
regards,
Carlos
Attachments
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Well, almost back to normal, i have installed a 10uf NP condenser
And this one is not so good as the ones i had before.
Will substitute the one tomorrow..but sonics is now almost the same.
This NP, when you touch it you send mains frequency that is in your body (body is an antenna to mains home cable) is beeing picked...not a good idea this way.
It is sensitive metal case exposed...hummmm, no good.
regards,
Carlos
And this one is not so good as the ones i had before.
Will substitute the one tomorrow..but sonics is now almost the same.
This NP, when you touch it you send mains frequency that is in your body (body is an antenna to mains home cable) is beeing picked...not a good idea this way.
It is sensitive metal case exposed...hummmm, no good.
regards,
Carlos
Attachments
The capacitor picks some run (movie), the other one, the brown one
picks much less noise.
Better if these condensers and capacitors if they were shield having the shield grounded.
YouTube - Capacitor case picking mains noise.avi
regards,
Carlos
picks much less noise.
Better if these condensers and capacitors if they were shield having the shield grounded.
YouTube - Capacitor case picking mains noise.avi
regards,
Carlos
Attachments
A friend wrote me his evaluation listening the Blame
"There’s no need to put capacitor nowhere i had some resistors wrong in value. But the highs are the same as before ..
The amplifier is now producing good punches, stop resistances were ten times bigger compared to schematics.The bass have now greatly improved.
I'm familiar with the DX STD that can reproduce high-fidelity explosions without using powder.
The audio quality of this one is out of series. As you said I realize now some instruments i never heard before.
Songs with bagpipes and brass instruments are very detailed .. there are breathing and nuances.
The sound from the drum is very prominent . I was listening to songs of rolling stone and I realized that the drummer uses half loose skin on his box.
The beatings are dry
I tested with music with the deeper underground jamiroquai, the crazy gnarls barkley. Children Black sabbath of the grave, NIB and others. These are songs that have drum beatings and against low highlighted.
I've never seen a guitar sound of explosion left or on a flute. Not in any battery. The bass it is velvety. Distortions of Guitars playing chords with double pickups sound creamy. , something that i was thinking was not in the recording, now i can listen.... suddenly appeared.
I listened for the devil of stones and a funny thing happened. In my room looked like the drums where in a place and the voice was in another place when i am using only a single channel.
Sounds not so strong together others are not mixed,i could listen one and other.
Songs with slap bass and funk guitar ..beats from the seventies sounded great.
Listening a song called Blurry puddle of mud of the harmonics are more fun than I listened and found that it is not only a guitar doing it.
The amplifier gives the impression that the room is larger, the same thing happened in my friends house."
I have translated his text, sorry, version is not very good...i had the help of google translator, but seems google is even worse then me.
regards,
Carlos
"There’s no need to put capacitor nowhere i had some resistors wrong in value. But the highs are the same as before ..
The amplifier is now producing good punches, stop resistances were ten times bigger compared to schematics.The bass have now greatly improved.
I'm familiar with the DX STD that can reproduce high-fidelity explosions without using powder.
The audio quality of this one is out of series. As you said I realize now some instruments i never heard before.
Songs with bagpipes and brass instruments are very detailed .. there are breathing and nuances.
The sound from the drum is very prominent . I was listening to songs of rolling stone and I realized that the drummer uses half loose skin on his box.
The beatings are dry
I tested with music with the deeper underground jamiroquai, the crazy gnarls barkley. Children Black sabbath of the grave, NIB and others. These are songs that have drum beatings and against low highlighted.
I've never seen a guitar sound of explosion left or on a flute. Not in any battery. The bass it is velvety. Distortions of Guitars playing chords with double pickups sound creamy. , something that i was thinking was not in the recording, now i can listen.... suddenly appeared.
I listened for the devil of stones and a funny thing happened. In my room looked like the drums where in a place and the voice was in another place when i am using only a single channel.
Sounds not so strong together others are not mixed,i could listen one and other.
Songs with slap bass and funk guitar ..beats from the seventies sounded great.
Listening a song called Blurry puddle of mud of the harmonics are more fun than I listened and found that it is not only a guitar doing it.
The amplifier gives the impression that the room is larger, the same thing happened in my friends house."
I have translated his text, sorry, version is not very good...i had the help of google translator, but seems google is even worse then me.
regards,
Carlos
Such small details, alike input capacitor material (polarized or not polarized)
and capacitance size is critical, if you reduce, then you will have losses in the deep bass tones....if you increase, then the series filter will drain treble.
The input capacitor is crossed by the AC audio signal, then crosses a resistance that can be before or after, depending the design, then will enter the first transistor base....but also goes crossing the base resistance that is connected to ground.
So, there is a series filter, first the resistance, then a capacitor them a resistance to ground...an RC filter, depending how big is the capacitor this will be draining high frequencies to ground.
Why i am posting this... to show you, or the ones does not know, the you need only this single capacitor, or electrolitic condenser, with wrong value, to kill you sonics, or your treble will be partially erased, or your bass will be weak.... will disturb sonics, in this case, in level, not in quality.
regards,
Carlos
and capacitance size is critical, if you reduce, then you will have losses in the deep bass tones....if you increase, then the series filter will drain treble.
The input capacitor is crossed by the AC audio signal, then crosses a resistance that can be before or after, depending the design, then will enter the first transistor base....but also goes crossing the base resistance that is connected to ground.
So, there is a series filter, first the resistance, then a capacitor them a resistance to ground...an RC filter, depending how big is the capacitor this will be draining high frequencies to ground.
Why i am posting this... to show you, or the ones does not know, the you need only this single capacitor, or electrolitic condenser, with wrong value, to kill you sonics, or your treble will be partially erased, or your bass will be weak.... will disturb sonics, in this case, in level, not in quality.
regards,
Carlos
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That is exactly what an amplifier should do. KUDOS!!
Any changes from this point need to be made with great caution.
No, i will keep them the way you see in the schematic, because the amplifier
is sounding excelent this way.
A friend, a local friend have suggested me to try bigger values, i said him this would not result good but i decide to make him happy doing that as a experience..only a experimentation, a try only.
Resulted not good.
Next model, to be released March, 28, will have another input impedance and the input capacitor will be smaller...but, the next amplifier was not created, not tried, not simulated and not assembled to listen..so..the next one does not exist for a while, it is just a possibility, may succeed or not....your suggestion of 470uf for C7 will be used Andrew T.
Some posts before may clarify to you Andrew T, i really could not understand what you mean.
I am not changing any capacitor or resistance value for the Dx Blame ES.
regards,
Carlos
is sounding excelent this way.
A friend, a local friend have suggested me to try bigger values, i said him this would not result good but i decide to make him happy doing that as a experience..only a experimentation, a try only.
Resulted not good.
Next model, to be released March, 28, will have another input impedance and the input capacitor will be smaller...but, the next amplifier was not created, not tried, not simulated and not assembled to listen..so..the next one does not exist for a while, it is just a possibility, may succeed or not....your suggestion of 470uf for C7 will be used Andrew T.
Some posts before may clarify to you Andrew T, i really could not understand what you mean.
I am not changing any capacitor or resistance value for the Dx Blame ES.
regards,
Carlos
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Was a friend that made the test, the same one have made some videos
The dark ones you have links published in earlier posts, dark videos, without good ligthing and recorded with a digital camera that is unable to register (record) bass tones.
regards Daniel,
Carlos
The dark ones you have links published in earlier posts, dark videos, without good ligthing and recorded with a digital camera that is unable to register (record) bass tones.
regards Daniel,
Carlos
Of course it is fine to construct an additional copy of the amplifier and then you can perform experiments upon the copy.
When you also have the original, intact, then it can be possible to make a comparison.
Yes, Daniel, this is the way i use to do, using comparison.
I have three amplifiers, the first one was tweaked for sonics and resulted in a prototype, the second is the pcboard layout beeing tested, the third one is to try, once more, small modifications.
regards,
Carlos
I have three amplifiers, the first one was tweaked for sonics and resulted in a prototype, the second is the pcboard layout beeing tested, the third one is to try, once more, small modifications.
regards,
Carlos
I believe that AndrewT is talking about the "NFB Cap".
Probably, both of you are correct on the effects of this.
A two small value will block or distort or decrease the lowest of notes.
A too large value will alter the sonics of your amplifier.
In the past, my solution to the problem was to use a 220uF low voltage, signal grade capacitor in series with a 3.3R 1/2 carbon resistor (big carbon = lower capacitance). I paralleled this RC to the pins of the existing NFB Cap, whereby the resistor was on the groundside.
This was an attempt to equalize the ESR between the two electrolytic capacitors so that one wouldn't block the other. It works--the caps are paralleled without a buzz.
This alteration cause a series of other fine tunings which were very minor (it was minor because the sonics were mostly intact). However, the bass was fantastically improved.
22uF//220uF+3.3R//4.7nF is mine, but yours would need larger values (because of your R7 is 470R, wheras mine is 2.7k).
Other possibility is decrease C1 instead.
Problem: C1 is too large in comparison to the NFB Cap values, and this causes a problem in making a selection for C1 as bass cannot pass through the area of R7 because the NFB Cap value is too small.
This is why AndrewT said to increase the NFB cap value to 330uF~470uF.
Nifty idea: Parallel another NFB cap of the exact same model onto the cap that is already in place--perhaps the sonics will remain intact while the lowest bass notes increases. This isn't exactly correct but its quite fast to try it. The ESR of both caps will match if they are exact same model. 🙂
Other idea: 220uF//2200uF+3.3R//220nF
Must test quality of the 2200 large cap by temporarily using it as a speaker output cap to verify clarity--not all power caps are clear. It may be a low voltage model for convenient smaller size.
Probably, both of you are correct on the effects of this.
A two small value will block or distort or decrease the lowest of notes.
A too large value will alter the sonics of your amplifier.
In the past, my solution to the problem was to use a 220uF low voltage, signal grade capacitor in series with a 3.3R 1/2 carbon resistor (big carbon = lower capacitance). I paralleled this RC to the pins of the existing NFB Cap, whereby the resistor was on the groundside.
This was an attempt to equalize the ESR between the two electrolytic capacitors so that one wouldn't block the other. It works--the caps are paralleled without a buzz.
This alteration cause a series of other fine tunings which were very minor (it was minor because the sonics were mostly intact). However, the bass was fantastically improved.
22uF//220uF+3.3R//4.7nF is mine, but yours would need larger values (because of your R7 is 470R, wheras mine is 2.7k).
Other possibility is decrease C1 instead.
Problem: C1 is too large in comparison to the NFB Cap values, and this causes a problem in making a selection for C1 as bass cannot pass through the area of R7 because the NFB Cap value is too small.
This is why AndrewT said to increase the NFB cap value to 330uF~470uF.
Nifty idea: Parallel another NFB cap of the exact same model onto the cap that is already in place--perhaps the sonics will remain intact while the lowest bass notes increases. This isn't exactly correct but its quite fast to try it. The ESR of both caps will match if they are exact same model. 🙂
Other idea: 220uF//2200uF+3.3R//220nF
Must test quality of the 2200 large cap by temporarily using it as a speaker output cap to verify clarity--not all power caps are clear. It may be a low voltage model for convenient smaller size.
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I read this and thought you had changed something to bring back the lost bass.
Your next post showed the input stage with values.
I stupidly guessed that the improvements were brought about by the input stage you posted.
If not then tell us what you changed so we can see what was losing the bass.
Daniel, with your license, your NFB will be used if you agree
Will be incorporated in the Corporation...ahahahaha!
Next model will have it, with your authorization and written agreement.
.......................
I have increase, a very little bit the bass, using a NP input condenser (10uf) and in parallel i have used 4.7uf capacitor.
Really, a very small increase.
The big trouble is that when we have wonderfull treble, we "think", we "perceive", we "believe" the bass is not so present.... proportion, ratio between that part of the spectrum..something human, perception...in the reality we are fooling ourselves.
In the simulator, 10uf is already very good, not needing anything more....but, real world i feel the bass shy.
It is very interesting.... even flat amplifiers, electrically flat, will have a sound signature with will be for Bass, mids or treble... this one is wonderfull, almost perfect for treble, very good for mids and reasonable for bass.
I could not increase, and i do not want to modify too much, will let this for next model.... i wanted to use the same board, but as we see, using Daniel idea, for instance, i will have to modify the pcboard layout.
Well, it is the best unit i have ever listened, even this way, with that shy bass i perceive, the builders can increase bass in their tone controls or reduce treble in their tone controls or speaker gain switch to make it better to their own taste...in the reality, one brazilian said bass is not weak.... me and another one felt this way..other may say the mids are weak...you know, people perceive that stuff different, and also depends on the home acoustics, speakers and musical program...also taste.
Modifications, suggested, are really appreciated, but i will not use in this model....will be for the future model... as this one has board layout made and tested, and all that hard work is finished and modifications season was closed too.
regards,
Carlos
Will be incorporated in the Corporation...ahahahaha!
Next model will have it, with your authorization and written agreement.
.......................
I have increase, a very little bit the bass, using a NP input condenser (10uf) and in parallel i have used 4.7uf capacitor.
Really, a very small increase.
The big trouble is that when we have wonderfull treble, we "think", we "perceive", we "believe" the bass is not so present.... proportion, ratio between that part of the spectrum..something human, perception...in the reality we are fooling ourselves.
In the simulator, 10uf is already very good, not needing anything more....but, real world i feel the bass shy.
It is very interesting.... even flat amplifiers, electrically flat, will have a sound signature with will be for Bass, mids or treble... this one is wonderfull, almost perfect for treble, very good for mids and reasonable for bass.
I could not increase, and i do not want to modify too much, will let this for next model.... i wanted to use the same board, but as we see, using Daniel idea, for instance, i will have to modify the pcboard layout.
Well, it is the best unit i have ever listened, even this way, with that shy bass i perceive, the builders can increase bass in their tone controls or reduce treble in their tone controls or speaker gain switch to make it better to their own taste...in the reality, one brazilian said bass is not weak.... me and another one felt this way..other may say the mids are weak...you know, people perceive that stuff different, and also depends on the home acoustics, speakers and musical program...also taste.
Modifications, suggested, are really appreciated, but i will not use in this model....will be for the future model... as this one has board layout made and tested, and all that hard work is finished and modifications season was closed too.
regards,
Carlos
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"the sound from the drum was very prominent"
So was mine before you fixed it. My amplifier is now much more enjoyable. Now the bass response is level between drum and also the pitches lower than drum.
Thank you.
Hey Danny, can i use your idea in the next model?
I would appreciate your agreement.
regards,
Carlos
I would appreciate your agreement.
regards,
Carlos
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