I am playing with a Chip amplifier...ahahahah
The DHR Turbo is there, switched off laughing as a hell....ahahahha!
This one is working hot.... it is defective.... rigth channel have not worked... it has full voltage off set (34.5 volts off set...short into the output)... reason why my chip is hot... will burn in some minutes.... i am waiting the heat protection to switch it off and nothing is happening.
Playing....enjoying the little chip amplifier...it is nice.
regards,
Carlos
The DHR Turbo is there, switched off laughing as a hell....ahahahha!
This one is working hot.... it is defective.... rigth channel have not worked... it has full voltage off set (34.5 volts off set...short into the output)... reason why my chip is hot... will burn in some minutes.... i am waiting the heat protection to switch it off and nothing is happening.
Playing....enjoying the little chip amplifier...it is nice.
regards,
Carlos
Attachments
I am using "windows" style.... into the enclosure there is a window
You can see the chip inside...pretty thing.
Also i can put my finger to observe the temperature increasing...hot...more than 45 degrées..... hot!
Operating 8 ohms... supply into 34.5 Volts..... not using more than 20 watts peak.
I think the damage i have into one channel is overheating the operating channel.
regards,
Carlos
You can see the chip inside...pretty thing.
Also i can put my finger to observe the temperature increasing...hot...more than 45 degrées..... hot!
Operating 8 ohms... supply into 34.5 Volts..... not using more than 20 watts peak.
I think the damage i have into one channel is overheating the operating channel.
regards,
Carlos
Attachments
Parts list..
Hi all,first great amp..i may not know much abou amps but this looks good..was wondering where if anyone could post me the parts list..then,i wanted to make a pcb out of this design done by alex...
tell me if its ok for the project to be given the green light!
Hi all,first great amp..i may not know much abou amps but this looks good..was wondering where if anyone could post me the parts list..then,i wanted to make a pcb out of this design done by alex...
tell me if its ok for the project to be given the green light!
I have not provided part list...but you can have it
from the schematic...take a piece of paper and produce your own part list... having some doubts just ask here and we gonna clarify.
Also try with Alexmm, maybe he made the parts list to order components to his construction.
regards,
Carlos
from the schematic...take a piece of paper and produce your own part list... having some doubts just ask here and we gonna clarify.
Also try with Alexmm, maybe he made the parts list to order components to his construction.
regards,
Carlos
partslist
I have just finished making the pcb for the dhr turbo but no one has posted the partslist specifically for the turbo. please help
I have just finished making the pcb for the dhr turbo but no one has posted the partslist specifically for the turbo. please help
Here you have the schematic... all values and indications are written into the ...
schematic.
All you have to to is to pick a pen and a piece of paper and write on is resistances, capacitors, transistors and diodes... them you will have the part lists you need to buy parts.
If something is not clear, or missed, just ask for special part data.
Parts list or bom are provided when someone take the charge to produce boards and distribute them, as group buy...not this amplifier case.... the one made the kindness to produce some boards, to assemble to test them and to publish pictures have not offered parts list.
In the reality, they are a little bit bureaucratic... as we can do by ourselves.
It is a free, a diy project....so....nothing more normal to produce a part of list by yourself if needed.
regards,
Carlos
schematic.
All you have to to is to pick a pen and a piece of paper and write on is resistances, capacitors, transistors and diodes... them you will have the part lists you need to buy parts.
If something is not clear, or missed, just ask for special part data.
Parts list or bom are provided when someone take the charge to produce boards and distribute them, as group buy...not this amplifier case.... the one made the kindness to produce some boards, to assemble to test them and to publish pictures have not offered parts list.
In the reality, they are a little bit bureaucratic... as we can do by ourselves.
It is a free, a diy project....so....nothing more normal to produce a part of list by yourself if needed.
regards,
Carlos
Suggested supply schematics
Can be used to DHR Turbo, to the DX Turbo and to the Precision 1
Of course can be used with any amplifier.
Inductor is not critical, you can coil over resistance, over a nail, a piece of wood, a piece of plastic... the way you want.... just provide some small inductante into the rails that will help you to filter and to avoid oscilations and interferences from the mains.
The electrolitic condenser value depends on your personal case... your speaker impedance and many things that depends some attention and study (reflections, to think about) to decide fuses and electrolitic condenser values.
The supply suggested is able to the worst case..into 2 ohms..and it is dimensioned to a single channel... attention.... single channel!
regards,
Carlos
Can be used to DHR Turbo, to the DX Turbo and to the Precision 1
Of course can be used with any amplifier.
Inductor is not critical, you can coil over resistance, over a nail, a piece of wood, a piece of plastic... the way you want.... just provide some small inductante into the rails that will help you to filter and to avoid oscilations and interferences from the mains.
The electrolitic condenser value depends on your personal case... your speaker impedance and many things that depends some attention and study (reflections, to think about) to decide fuses and electrolitic condenser values.
The supply suggested is able to the worst case..into 2 ohms..and it is dimensioned to a single channel... attention.... single channel!
regards,
Carlos
Attachments
LEDs are there to the supply drop monitoring
They will loose brigth when you have full power strong bass... they are not really needed to be there... i like them there, but, supply does not need those "fashion" things in the reality.
Use high voltage condensers... 200 volts or more...use big resistances, 1 watt or more... electrolitic condensers must be high voltage units .... 80 volts or 100 volts units (expensive as a hell)
You will see other voltages into my supply.... smaller voltage condensers... those ones are connected in series... there are many voltages going out from that transformer that was coiled by myself to provide many different voltages into the secondary..so..there are many rectifiers (different one) to allow me to compare and to use with different voltages.
Use this chart... study and try to figure out your use... your special situation.
Transformers must be tested under loaded conditions...you must install a drain resistance, sucking many amperes from your supply to see how huge it is under load... then decide your fuses, based, supported, referenced into your reality.
They will loose brigth when you have full power strong bass... they are not really needed to be there... i like them there, but, supply does not need those "fashion" things in the reality.
Use high voltage condensers... 200 volts or more...use big resistances, 1 watt or more... electrolitic condensers must be high voltage units .... 80 volts or 100 volts units (expensive as a hell)
You will see other voltages into my supply.... smaller voltage condensers... those ones are connected in series... there are many voltages going out from that transformer that was coiled by myself to provide many different voltages into the secondary..so..there are many rectifiers (different one) to allow me to compare and to use with different voltages.
Use this chart... study and try to figure out your use... your special situation.
Transformers must be tested under loaded conditions...you must install a drain resistance, sucking many amperes from your supply to see how huge it is under load... then decide your fuses, based, supported, referenced into your reality.
Attachments
One supply detail... into this one you cannot see the rectifiers.
This one is the weakest one.... to 42 volts... to feed one amplifier channel while using 8 ohms impedance.
I use to test good and bad supplies... this one is the bad one.
regards,
Carlos
..................................................................................................
About electrolitic condensers you have this video i have made to you... sorry the english folks... it is the best i have.
http://www.youtube.com/watch?v=KjE_ExOoWWs
....................................................................................................
Here you have the DHR turbo playing:
http://www.youtube.com/watch?v=GE5EjMSqvMI
....................................................................................................
Go to Youtube and type Dx Amplifier.... you gonna find 40 videos there.
This one is the weakest one.... to 42 volts... to feed one amplifier channel while using 8 ohms impedance.
I use to test good and bad supplies... this one is the bad one.
regards,
Carlos
..................................................................................................
About electrolitic condensers you have this video i have made to you... sorry the english folks... it is the best i have.
http://www.youtube.com/watch?v=KjE_ExOoWWs
....................................................................................................
Here you have the DHR turbo playing:
http://www.youtube.com/watch?v=GE5EjMSqvMI
....................................................................................................
Go to Youtube and type Dx Amplifier.... you gonna find 40 videos there.
Attachments
You are invited to watch my new files... images from electronics
and a lot of things from Brazil... local images, family images, some personal objects, landscapes.
I am uploading and have started the series:
"To the whole world"
I will upload, day by day, continuously, around 12 thousand pictures into 4 minutes slide movies... this is beeing done to publish my country, to show my free DIY audio amplifiers, to your enjoyment and to have some recording, registration and saved pictures that will be there if i have a crash into my computer HD or something alike... so, it is a backup, opened to the whole world, to friends and family.
Will go progressing with this upload depending the quantity of hits..... if not too much i will be doing very slowly, as will be only a backup...if high rate of hits, them people is interested and i will upload faster.
It is for free...i am not selling nothing, Dx Corporation exists in my dreams..i use to be kidding with that...but nobody knows what future reserve to both of us...future is a big interrogation mark filled with big nice surprises.
Here is the link:
http://www.youtube.com/watch?v=_ZHHOHoCvhg
Type Dx Amplifier and many videos will pop up to you.
Electronics is very nice... diy is wonderfull...to produce pictures is nice too.
regards,
Carlos
and a lot of things from Brazil... local images, family images, some personal objects, landscapes.
I am uploading and have started the series:
"To the whole world"
I will upload, day by day, continuously, around 12 thousand pictures into 4 minutes slide movies... this is beeing done to publish my country, to show my free DIY audio amplifiers, to your enjoyment and to have some recording, registration and saved pictures that will be there if i have a crash into my computer HD or something alike... so, it is a backup, opened to the whole world, to friends and family.
Will go progressing with this upload depending the quantity of hits..... if not too much i will be doing very slowly, as will be only a backup...if high rate of hits, them people is interested and i will upload faster.
It is for free...i am not selling nothing, Dx Corporation exists in my dreams..i use to be kidding with that...but nobody knows what future reserve to both of us...future is a big interrogation mark filled with big nice surprises.
Here is the link:
http://www.youtube.com/watch?v=_ZHHOHoCvhg
Type Dx Amplifier and many videos will pop up to you.
Electronics is very nice... diy is wonderfull...to produce pictures is nice too.
regards,
Carlos
A very good music to DHR Turbo is the Brazilian Samba
heheheh... enjoy electronic pictures, Dx Home, some landscapes and "Amélia, the real nice woman"... the one never complains.
http://www.youtube.com/watch?v=JIM36EkPr50
Yes folks... sound is distorted...also i was tweaking equalization during recording....not so good..but rithm is awsome!
regards,
Carlos
heheheh... enjoy electronic pictures, Dx Home, some landscapes and "Amélia, the real nice woman"... the one never complains.
http://www.youtube.com/watch?v=JIM36EkPr50
Yes folks... sound is distorted...also i was tweaking equalization during recording....not so good..but rithm is awsome!
regards,
Carlos
Attachments
dx turbo
dear sir
greetings thanks for dx turbo very nice amp i am using for pa
sound reinforcement very stable i tried to send picture of turbo to
diy but they said attachment was to big so i sent it to you sorry for
poor image used my mobile will be sending you very clear picture of
turbo with 10 pairs waiting for pcb to arrive i want to know if 10
pairs would be ok for 2.8 ohms load is any more powerful version
likely to come out in near future buit most amps from electronic australia anthony holtons av 400 av 800 av 1000 but this amp gave
the greatest pleasure in constructing as parts were very easy to find
used st 5200 st1943 no fakes very cheap the quasar pic was for
lumba ogir as he wanted to see picture f it when imade i did not have
pcb pattern but now i have it and will rebuild it once again thank you
very much for dx turbo hoping for bigger things in future bye
thanking you
andrew lebon
dear sir
greetings thanks for dx turbo very nice amp i am using for pa
sound reinforcement very stable i tried to send picture of turbo to
diy but they said attachment was to big so i sent it to you sorry for
poor image used my mobile will be sending you very clear picture of
turbo with 10 pairs waiting for pcb to arrive i want to know if 10
pairs would be ok for 2.8 ohms load is any more powerful version
likely to come out in near future buit most amps from electronic australia anthony holtons av 400 av 800 av 1000 but this amp gave
the greatest pleasure in constructing as parts were very easy to find
used st 5200 st1943 no fakes very cheap the quasar pic was for
lumba ogir as he wanted to see picture f it when imade i did not have
pcb pattern but now i have it and will rebuild it once again thank you
very much for dx turbo hoping for bigger things in future bye
thanking you
andrew lebon
No more Optimus Amplifier.... increasing bias into the HRII
using around 1 ampere and more current (tested till 3 amperes)...
... i found that 1 ampere or higher standby bias does not give us any advantage into sound reproduction.... TESTED!
I found was sligthly mufled into higher bias....also i have found the optimized bias point is around 250 miliamperes (as Nordic said..he was rigth!).
Comparisons made, using two identical amplifiers, same parts and same supply, into a single speaker, gave me this result..instead to adjust your stand by bias to 60 to 100 miliamperes, it is better to increase it to 250 to 300 miliamperes because performance was better than lower bias and higher bias.
So.... Optimus is dead....now we have HRII Optimized!
Be happy folks.
Enjoy Dx Amplifier.... sounding near the perfection.
regards,
Carlos
using around 1 ampere and more current (tested till 3 amperes)...
... i found that 1 ampere or higher standby bias does not give us any advantage into sound reproduction.... TESTED!
I found was sligthly mufled into higher bias....also i have found the optimized bias point is around 250 miliamperes (as Nordic said..he was rigth!).
Comparisons made, using two identical amplifiers, same parts and same supply, into a single speaker, gave me this result..instead to adjust your stand by bias to 60 to 100 miliamperes, it is better to increase it to 250 to 300 miliamperes because performance was better than lower bias and higher bias.
So.... Optimus is dead....now we have HRII Optimized!
Be happy folks.
Enjoy Dx Amplifier.... sounding near the perfection.
regards,
Carlos
No.... i am not sure but seems not the Alexmm amplifier
He made better than that.... search back this thread and you gonna see Alex amplifier.
Carlos
He made better than that.... search back this thread and you gonna see Alex amplifier.
Carlos
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