All right Worhorse...i will search for you.
Meanman
Are you using 220 ohms into Q6 emitter (Dx Blame ST) or using 100 ohms (Dx Blame ES)?
I have assembled several amplifiers without Q6 burning..so..you have something wrong in your amplifier and Q6 will burn once again if you force it to operate into clipping..... i suppose you are using 100 ohms into Q6 emitter.... let me know if you using 100 ohms please.
The Dx Blame ES was considered not safe...not supported, not suggested and not guaranteed..because 100 ohms there is dangerous.
Take some time and read the thread, the Blame ES and Blame ST and you gonna see these transistors are not burning...your case is exception, so i do think you may have a remaining error..and it will burn once more till you discover what is wrong on it.
Try 2N5551 instead of BC546...maybe your BC is a generic fake one....but ATTENTION!... the 2N5551 has emiter and colector inverted..so..you must install it turning 180 degrees related the BC546 insertion position...leads are not the same!
regards,
Carlos
Meanman
Are you using 220 ohms into Q6 emitter (Dx Blame ST) or using 100 ohms (Dx Blame ES)?
I have assembled several amplifiers without Q6 burning..so..you have something wrong in your amplifier and Q6 will burn once again if you force it to operate into clipping..... i suppose you are using 100 ohms into Q6 emitter.... let me know if you using 100 ohms please.
The Dx Blame ES was considered not safe...not supported, not suggested and not guaranteed..because 100 ohms there is dangerous.
Take some time and read the thread, the Blame ES and Blame ST and you gonna see these transistors are not burning...your case is exception, so i do think you may have a remaining error..and it will burn once more till you discover what is wrong on it.
Try 2N5551 instead of BC546...maybe your BC is a generic fake one....but ATTENTION!... the 2N5551 has emiter and colector inverted..so..you must install it turning 180 degrees related the BC546 insertion position...leads are not the same!
regards,
Carlos
Attachments
Last edited:
Q6 will be damaged if the amp is overloaded.
Q6 needs the protection of a resistor between Collector and Power Ground.
The value of R16 determines the quiescent current through Q6. It has almost no effect on the fault power when 35V potential is driving current through Q6.
This was brought up many posts ago and DX refused to take in the information and went HIS OWN way saying I and others have nothing to contribute.
Q6 needs the protection of a resistor between Collector and Power Ground.
The value of R16 determines the quiescent current through Q6. It has almost no effect on the fault power when 35V potential is driving current through Q6.
This was brought up many posts ago and DX refused to take in the information and went HIS OWN way saying I and others have nothing to contribute.
Last edited:
So, check your amplifier for mistakes.
Several guys have assembled... no one had troubles..so, i cannot accept the amplifier have design troubles and no modification will be made.
Some guys wants to see defects because they want that...maybe the defect is in themselves, not the amplifier...i have tortured amplifiers....there's absolutelly no problem on it.
Mr. AndrewT will return to ignore list because is re starting to provocate Uncle Charlie and i will not be answering him anymore.
regards,
Carlos
Several guys have assembled... no one had troubles..so, i cannot accept the amplifier have design troubles and no modification will be made.
Some guys wants to see defects because they want that...maybe the defect is in themselves, not the amplifier...i have tortured amplifiers....there's absolutelly no problem on it.
Mr. AndrewT will return to ignore list because is re starting to provocate Uncle Charlie and i will not be answering him anymore.
regards,
Carlos
Last edited:
NO effect on the sound , but can "save the day" (below) ,It is easy to add .. worst case scratch a trace in half , add it. Don't feel bad , I missed it on early amps , will add at least the pads (for resistor) , on future ones. It is hard for me to clip at 75V.
OS
Attachments
Carlos, please don't feel offended he is only trying to help.For now the problem solved do the test ones more if it's OK then I'm happy.Does Q6 dies again than there is something else wrong.
No way... tests proved the amplifier is stable and no troubles
related that..also Dr. Self is not using that resistance.
Will not change the amplifier.
Will not read you Ostripper, you are supporting non sense...if real world does not burn your ideas has not support in the reality.
Menman should have other kind of problems in his amplifier.
More than 50 units were build, no one reported troubles in Q6.
regards,
Carlos
related that..also Dr. Self is not using that resistance.
Will not change the amplifier.
Will not read you Ostripper, you are supporting non sense...if real world does not burn your ideas has not support in the reality.
Menman should have other kind of problems in his amplifier.
More than 50 units were build, no one reported troubles in Q6.
regards,
Carlos
It is not correct dear Meanman, these gentlemen knows very well
i do not like them... this was said and posted several times...if they want to help they should keep distance not to disturb.
They impose their presence, in special when there is someone having troubles with the amplifier..usually mistakes when assembling..then they come to spread distrust in the design.... they do help themselves, not me.
The amplifier was tested..proved to work fine.... was tortured and several volts was applied to the amplifier in the input... output circuit, colector to emitter is served by the 220 ohms limiting resistance.... even Dr. Self is not using this one they invented.
I will not read, nor answer these gentleman anymore... friends will be reading taking care of them to inform me when they are trying to unstabilize threads..then i will inform moderators.
regards,
Carlos
i do not like them... this was said and posted several times...if they want to help they should keep distance not to disturb.
They impose their presence, in special when there is someone having troubles with the amplifier..usually mistakes when assembling..then they come to spread distrust in the design.... they do help themselves, not me.
The amplifier was tested..proved to work fine.... was tortured and several volts was applied to the amplifier in the input... output circuit, colector to emitter is served by the 220 ohms limiting resistance.... even Dr. Self is not using this one they invented.
I will not read, nor answer these gentleman anymore... friends will be reading taking care of them to inform me when they are trying to unstabilize threads..then i will inform moderators.
regards,
Carlos
Destroyer,
Believe him. Meanman describes what he did and what happened.
This is precisely when Q6 will get too hot. Q6 needs a protection resistor, no matter how much you protest. Try 2k from collector to ground. Ost shows 100r in the inverted version.
I use to follow Doctor Self..not U2
So, if Doctor Self say i have to include..then i will do it..but only this way.
He does not use that resistance..so...not needed.
I have tested also..not needed.
Several guys have assembled... reported everything fine.
So... good buy and farewell.
regards,
Carlos
So, if Doctor Self say i have to include..then i will do it..but only this way.
He does not use that resistance..so...not needed.
I have tested also..not needed.
Several guys have assembled... reported everything fine.
So... good buy and farewell.
regards,
Carlos
Dear Meanman, i have assembled one Dx Blame ST with 55 volts supply
And they said cannot work this way while using BC546/556 and BD139/140... and it is working....monthes working.... i use full power for long time... was tortured with the generator, low impedance load and inspected using Osciloscope... passed!.... and they said no good and cannot work....so...you see by these things what and ho is no good in that subject.
I support my things in real life... Doctor Self designed and have not asked me to install colector resistance...and you can watch the transistors Dr Self suggested and tested.... i have reduced the emitter resistance, but even this way we have no current to kill the transistor, unless there are other kind of troubles and mistakes in the amplifier circuit.
These gentlemen use conjectures... and they love to do that when they have someone facing troubles..and usually troubles are because construction mistakes or fake parts... when this happens they "land"... to help their own evil intentions, not you, not the forum and of course not me... we know them a long, long, very long time and their actions support your evaluation about their personality.
This amplifier, dear Meanman, is facing huge signal, this enormous pulse when i switch on the computer while the power amplifier was already switched on...you see the meter goes high when this kind of meter faces huge damping... if was because of clipping, for sure clipping happens and the amplifier is facing much more voltage in the supply compared to your amplifier...so.... there are much more chances for this one to have Q6 burned then your amplifer that is using normal voltages.
Are you absolutelly sure your resistance is 220 ohms?.... not a mistake alike 22 ohms or 2.2 ohms?....please, check that twice.
You can see in these videos, the amplifier survived and remains alive while using 55 volts in the supplies.... also receiving huge pulses in the input that should burn Q6 if it was weakened by the absence of the conjecture resistance...you see it working..not burning.
So.... this conjecture does not deserves to be taken seriously, because the intention hidden behind the action is not fine, nor fair and not decent at all.... if these gentlemen really believe that..well....now i understand why they land here...they came to learn some.
Here you have some videos:
http://www.youtube.com/watch?v=DynJ8yKHCXI
http://www.youtube.com/watch?v=nYbiN1CQNQE
http://www.youtube.com/watch?v=QNjZKbz3YL8
Also, if you want, i have several videos made torturing the amplifier and no transistor was burned..so.... they just want to create this feeling you may have... the feeling of insecurity they use to spread.
I will not comment this subject anymore, to them or with others, will be only tracking their posts, and others may come, as usual, ..they are a group of very courageous folks that use to come in group here...i am waiting more visitors soon... will be reading them to report moderators.
regards,
Carlos
And they said cannot work this way while using BC546/556 and BD139/140... and it is working....monthes working.... i use full power for long time... was tortured with the generator, low impedance load and inspected using Osciloscope... passed!.... and they said no good and cannot work....so...you see by these things what and ho is no good in that subject.
I support my things in real life... Doctor Self designed and have not asked me to install colector resistance...and you can watch the transistors Dr Self suggested and tested.... i have reduced the emitter resistance, but even this way we have no current to kill the transistor, unless there are other kind of troubles and mistakes in the amplifier circuit.
These gentlemen use conjectures... and they love to do that when they have someone facing troubles..and usually troubles are because construction mistakes or fake parts... when this happens they "land"... to help their own evil intentions, not you, not the forum and of course not me... we know them a long, long, very long time and their actions support your evaluation about their personality.
This amplifier, dear Meanman, is facing huge signal, this enormous pulse when i switch on the computer while the power amplifier was already switched on...you see the meter goes high when this kind of meter faces huge damping... if was because of clipping, for sure clipping happens and the amplifier is facing much more voltage in the supply compared to your amplifier...so.... there are much more chances for this one to have Q6 burned then your amplifer that is using normal voltages.
Are you absolutelly sure your resistance is 220 ohms?.... not a mistake alike 22 ohms or 2.2 ohms?....please, check that twice.
You can see in these videos, the amplifier survived and remains alive while using 55 volts in the supplies.... also receiving huge pulses in the input that should burn Q6 if it was weakened by the absence of the conjecture resistance...you see it working..not burning.
So.... this conjecture does not deserves to be taken seriously, because the intention hidden behind the action is not fine, nor fair and not decent at all.... if these gentlemen really believe that..well....now i understand why they land here...they came to learn some.
Here you have some videos:
http://www.youtube.com/watch?v=DynJ8yKHCXI
http://www.youtube.com/watch?v=nYbiN1CQNQE
http://www.youtube.com/watch?v=QNjZKbz3YL8
Also, if you want, i have several videos made torturing the amplifier and no transistor was burned..so.... they just want to create this feeling you may have... the feeling of insecurity they use to spread.
I will not comment this subject anymore, to them or with others, will be only tracking their posts, and others may come, as usual, ..they are a group of very courageous folks that use to come in group here...i am waiting more visitors soon... will be reading them to report moderators.
regards,
Carlos
Last edited:
I have asked him to check this Chlorophile
I had no answer about that.
I have also produced a video informing him how to proceed to check his speaker:
http://www.youtube.com/watch?v=i-Jkw0MtuyI
regards,
Carlos
I had no answer about that.
I have also produced a video informing him how to proceed to check his speaker:
http://www.youtube.com/watch?v=i-Jkw0MtuyI
regards,
Carlos
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.