Dx Blame ES .... based into the Blameless, i am trying a new amplifier - Page 99

destroyer X · 18th March 2010, 09:50 PM

Is working well and that you are making sucessfull experimentation with bias.

Thank you to inform what is going on with you.

regards,

Carlos

destroyer X · 18th March 2010, 10:01 PM

Here is an image that may answer your questions about.

regards,

Carlos

Eva · 18th March 2010, 10:14 PM

A speaker fuse may add more distortion and bass colouration than any electrolytic capacitor. Resistance is signal dependent.

destroyer X · 10:13 AM

electronic protection..delay insertion, DC detector and maybe overcurrent sensor....i will use something from Randy Slone book.... will build and test, naturally, then will let you know how it works and will post the schematic for your use.

Randy Slone - Electricity and Electronics - book page 278

regards,

Carlos

destroyer X · 19th March 2010, 03:26 PM

regards,

Carlos

destroyer X · 19th March 2010, 03:37 PM

Also i will invite my friends to come to evaluate, because i have my own position about voltage regulators (no good) and this may influence my decisions.

Others will evaluate for me..... then i will post results.

For a while, working fine, sound seems to be the same...but i was outside my normal audition room..and could not compare....we gonna see in the next exciting chapter (at least it is exciting for me)

regards,

Carlos

destroyer X · 19th March 2010, 03:45 PM

Don't you believe me?.....that's good...never believe...ask proofs.

I told we can have positive regulation..means the output voltage increases when you load..in the place to have voltage drops, you gonna have voltage increasings.

Here i am proving what i use to say:

YouTube - Electronic supply load test 5A

regards,

Carlos

wg_ski · 19th March 2010, 05:48 PM

Quote:

Originally Posted by Eva

A speaker fuse may add more distortion and bass colouration than any electrolytic capacitor. Resistance is signal dependent.

Nah... the cheapskate bean counters will put in a 220 uf.... maybe 470 if you're lucky. THAT will provide some bass coloration for ya.

Speaker fuses do indeded distort. Pro amps which use output crowbars put the fuse INSIDE the feedback for that reason.

destroyer X · 19th March 2010, 08:54 PM

playing around...and of course i will contribute with this distortion story.

You see... fuse has a very thin wire..so, fat electrons when flows goes kicking side by side and disturb the electrons flow...some of then felt angry and decide to go back to the source..they do not want to play anymore..this way..we have distortions....maybe because wire without gain, and outside the feedback loop is capturing some microwaves from the universe black hole.

Really...the problem is that people does not use wire with gain.

ahahahaahahah!

Thank you, you are making me laugh.

regards,

Carlos

destroyer X · 20th March 2010, 09:22 AM

Increase R16 to 220 ohms, as this transistor is working warm when we keep the amplifier working under overdrive sittuation for long time...this is not healthy for this small transistor.....or...substitute the transistor by a BD139... leads will be a problem if you do this way....better to increase this resistance to reduce power from 250 miliwatts to almost 115 miliwatts (aprox.).... this transistor is a 500mW unit.

Thank you Wahab, you have already suggested that.

The "x" marked in red where already removed....but the extra diodo will be helpfull, despite reduces Q2 action.

I am playing, producing destructive tests to see how resistant the amplifier is.

regards,

Carlos

18th March 2010, 09:50 PM	#981
destroyer X diyAudio Member Join Date: Feb 2004 Location: Recife - Brasil Northeast	I am glad to receive news from you Ekkart.... good that your amplifier Is working well and that you are making sucessfull experimentation with bias. Thank you to inform what is going on with you. regards, Carlos __________________ Try to build an amplifier folks ... it is pure adrenaline!.. when not work first time, then becomes a nice challenge...and we usually overcome the trouble... and we feel very well to be mastering the machine.

18th March 2010, 10:14 PM	#983
Eva diyAudio Member Join Date: Oct 2003 Location: Near the sea	A speaker fuse may add more distortion and bass colouration than any electrolytic capacitor. Resistance is signal dependent. __________________ I use to feel like the small child in The Emperor's New Clothes tale

19th March 2010, 10:07 AM	#984
destroyer X diyAudio Member Join Date: Feb 2004 Location: Recife - Brasil Northeast	I will try to install the supply inside my enclosure..then i will manage to build an electronic protection..delay insertion, DC detector and maybe overcurrent sensor....i will use something from Randy Slone book.... will build and test, naturally, then will let you know how it works and will post the schematic for your use. Randy Slone - Electricity and Electronics - book page 278 regards, Carlos __________________ Try to build an amplifier folks ... it is pure adrenaline!.. when not work first time, then becomes a nice challenge...and we usually overcome the trouble... and we feel very well to be mastering the machine. Last edited by destroyer X; 19th March 2010 at 10:13 AM.

19th March 2010, 03:37 PM	#986
destroyer X diyAudio Member Join Date: Feb 2004 Location: Recife - Brasil Northeast	I could not feel difference..but will listen in my normal room and for longer time Also i will invite my friends to come to evaluate, because i have my own position about voltage regulators (no good) and this may influence my decisions. Others will evaluate for me..... then i will post results. For a while, working fine, sound seems to be the same...but i was outside my normal audition room..and could not compare....we gonna see in the next exciting chapter (at least it is exciting for me) regards, Carlos __________________ Try to build an amplifier folks ... it is pure adrenaline!.. when not work first time, then becomes a nice challenge...and we usually overcome the trouble... and we feel very well to be mastering the machine.

19th March 2010, 03:45 PM	#987
destroyer X diyAudio Member Join Date: Feb 2004 Location: Recife - Brasil Northeast	Dx Voltage regulator is good...it is huge..you can abuse Don't you believe me?.....that's good...never believe...ask proofs. I told we can have positive regulation..means the output voltage increases when you load..in the place to have voltage drops, you gonna have voltage increasings. Here i am proving what i use to say: YouTube - Electronic supply load test 5A regards, Carlos __________________ Try to build an amplifier folks ... it is pure adrenaline!.. when not work first time, then becomes a nice challenge...and we usually overcome the trouble... and we feel very well to be mastering the machine.


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19th March 2010, 08:54 PM	#989
destroyer X diyAudio Member Join Date: Feb 2004 Location: Recife - Brasil Northeast	Yeah!...that's the way i like it....the thread very funny, people with good mood playing around...and of course i will contribute with this distortion story. You see... fuse has a very thin wire..so, fat electrons when flows goes kicking side by side and disturb the electrons flow...some of then felt angry and decide to go back to the source..they do not want to play anymore..this way..we have distortions....maybe because wire without gain, and outside the feedback loop is capturing some microwaves from the universe black hole. Really...the problem is that people does not use wire with gain. ahahahaahahah! Thank you, you are making me laugh. regards, Carlos __________________ Try to build an amplifier folks ... it is pure adrenaline!.. when not work first time, then becomes a nice challenge...and we usually overcome the trouble... and we feel very well to be mastering the machine.

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