10 ohm 3 watts resister is used now.
1. input is shorted
2.output wire to ground wire is 11.02v
3.voltage measured over protective resistances are 178mv over the negative resistance rail and for positive rail is 177mv but the ground is connected to earth and output ground as well.
4.offsett voltage is with ground attached to earth is 29.43v volt and with ground wire is removed it is 39.64 volt.
5.base to emitter with input shorted is 454.3mv for all transistor on the negative side of the board.
Now for the positive side of the board with input shorted are: 453.7 mv
My power supply measured over the caps is dc volt of (negative of cap and positive of cap measured = 61.8volt.
images will uploaded in few hours just getting camera charged up.
1. input is shorted
2.output wire to ground wire is 11.02v
3.voltage measured over protective resistances are 178mv over the negative resistance rail and for positive rail is 177mv but the ground is connected to earth and output ground as well.
4.offsett voltage is with ground attached to earth is 29.43v volt and with ground wire is removed it is 39.64 volt.
5.base to emitter with input shorted is 454.3mv for all transistor on the negative side of the board.
Now for the positive side of the board with input shorted are: 453.7 mv
My power supply measured over the caps is dc volt of (negative of cap and positive of cap measured = 61.8volt.
images will uploaded in few hours just getting camera charged up.
There are mistakes into the construction
check everything, again and again, till it works fine....during the check up you will be finding errors.
I want the voltage chart filled the way i have asked you, also the VBE charts...for sure VBEs are not the same the simplified way you told me.
regards,
Carlos
check everything, again and again, till it works fine....during the check up you will be finding errors.
I want the voltage chart filled the way i have asked you, also the VBE charts...for sure VBEs are not the same the simplified way you told me.
regards,
Carlos
errors now my heart is going to break 🙁
okay i fill in the chart and get back to you i know simple measurement when it cums to the terminology of audio words i get puzzled, like vbe muliplier is that the transister infront of the bias pot.
i just dnt get i looked through board the only thoght am getting it must be that bastrd fake transistors.
okay i fill in the chart and get back to you i know simple measurement when it cums to the terminology of audio words i get puzzled, like vbe muliplier is that the transister infront of the bias pot.
i just dnt get i looked through board the only thoght am getting it must be that bastrd fake transistors.
hehehe.... do the best you can... the bstard fake
may not be the problem...they use to have more gain, will dissipate less power too but will work.
Sometimes, those fake ones are just the one have not passed the factory selection..let's imagine the transistor must have gain from 60 to 120... and they find one with gain 59.... they do not always send to the junk box..sometimes are sold with lower price as "parts out of specification".
Sometimes are lower power transistors with new numbers printed.
Yes, the transistor you have near the bias trimpot is the one is called VBE multiplier and also called heat sensor.
Good luck,
regards,
Carlos
may not be the problem...they use to have more gain, will dissipate less power too but will work.
Sometimes, those fake ones are just the one have not passed the factory selection..let's imagine the transistor must have gain from 60 to 120... and they find one with gain 59.... they do not always send to the junk box..sometimes are sold with lower price as "parts out of specification".
Sometimes are lower power transistors with new numbers printed.
Yes, the transistor you have near the bias trimpot is the one is called VBE multiplier and also called heat sensor.
Good luck,
regards,
Carlos
hello i just joined DIYaudio.com because im an audiophile (sorry for off-topic)
i wanted to know is there any good quality DHR Turbo Amplifier scematics and ready to print board layouts?
please send me them i want to build DHR Turbo Amplifier so bad 🙂 🙂
i wanted to know is there any good quality DHR Turbo Amplifier scematics and ready to print board layouts?
please send me them i want to build DHR Turbo Amplifier so bad 🙂 🙂
Ozracing, go to the Greg home pages, the ones dedicated to Dx amplifiers
and copy the files you need...all needed informations are there...needing some more details..just ask me here.
Welcome to our forum and be happy!
Try to read this entire thread... i hope english is easier to you than it is to me.... was always hard to me to read...i hope is better to you.
http://users.tpg.com.au/users/gerskine/dxamp/
regards,
Carlos
and copy the files you need...all needed informations are there...needing some more details..just ask me here.
Welcome to our forum and be happy!
Try to read this entire thread... i hope english is easier to you than it is to me.... was always hard to me to read...i hope is better to you.
http://users.tpg.com.au/users/gerskine/dxamp/
regards,
Carlos
Destroyer X
i found only schematic. But i need a board layout (im bad at board layout making)
COULD ANY ONE GIVE ME READY TO PRINT BOARD LAYOUT PDF FOR DHR Turbo Amplifier 🙂 🙂
i found only schematic. But i need a board layout (im bad at board layout making)
COULD ANY ONE GIVE ME READY TO PRINT BOARD LAYOUT PDF FOR DHR Turbo Amplifier 🙂 🙂
This was already published... return to the thread beginning and read it with calm
and patience, as all informations needed were already published..also the pdf you want.
So, no reason to ask people to give you something already exist.
Please, return and read!
thread was made to give you all the needed informations..if something is not complete..then let me know and i will fix it.
regards,
Carlos
and patience, as all informations needed were already published..also the pdf you want.
So, no reason to ask people to give you something already exist.
Please, return and read!
thread was made to give you all the needed informations..if something is not complete..then let me know and i will fix it.
regards,
Carlos
i liked your video on youtube
nice video i see your amplifier has very good bass reproducing
and im thinking about ading more transistors (drivers)
and rising voltage to 90v
i guest it would have some distortion 🙂
P.S. Sorry for bad english
regards,
Aldas
nice video i see your amplifier has very good bass reproducing
and im thinking about ading more transistors (drivers)
and rising voltage to 90v
i guest it would have some distortion 🙂
P.S. Sorry for bad english
regards,
Aldas
Understand how this works, will be easy to find errors
or to adjust to your transistors/supply voltage.
Understand (just for understanding) the energy will start into the positive line (not real, just to be easy to understand) and will cross those two 3K3 resistances in series (bootstrap) and them will cross the diodes creating 2.4 volts...and this will be needed to supply each transistor with 0.6 volts (0.6 volts multiplied by 4 results in 2.4V)..and then will cross the voltage amplifier transistor from colector to emitter..and them will continue to the negative line...so.... all parts must be connected to work, driver transistor base must be connected..the 3K3 resistance must be really 3300 ohms..they must be connected to the positive line...well..all circuit must be connected to work..also differential must be fine to allow the voltage amplifier to conduct...into the voltage amplifier, from base to emitter you must measure more than 550 milivolts (better if around 600 milivolts..tollerable if 650 milivolts and danger if higher than 700 milivolts).
This is all i can do for you Joka...study...i think you need...understand how things works.
bye.
Carlos
or to adjust to your transistors/supply voltage.
Understand (just for understanding) the energy will start into the positive line (not real, just to be easy to understand) and will cross those two 3K3 resistances in series (bootstrap) and them will cross the diodes creating 2.4 volts...and this will be needed to supply each transistor with 0.6 volts (0.6 volts multiplied by 4 results in 2.4V)..and then will cross the voltage amplifier transistor from colector to emitter..and them will continue to the negative line...so.... all parts must be connected to work, driver transistor base must be connected..the 3K3 resistance must be really 3300 ohms..they must be connected to the positive line...well..all circuit must be connected to work..also differential must be fine to allow the voltage amplifier to conduct...into the voltage amplifier, from base to emitter you must measure more than 550 milivolts (better if around 600 milivolts..tollerable if 650 milivolts and danger if higher than 700 milivolts).
This is all i can do for you Joka...study...i think you need...understand how things works.
bye.
Carlos
An externally hosted image should be here but it was not working when we last tested it.
Ozracing...the amplifier was designed/created/tested/guaranteed
to work with lower voltage than the one you want.
Not suggested, not recomended.
Do it under your own risk..i know nothing about this amplifier working with that voltage you want to use.
I suggest you to find another amplifier to assemble, as i cannot help you using different voltages... and i believe that will be super unstable with such big voltage.
90 plus 90 volts is a very dangerous voltage...my amplifiers were not made to such kind of operation...try something from Rodd Elliot... this voltage can kill someone.
I will not stimulate, nor support, modifications into the schematic.
Carlos
to work with lower voltage than the one you want.
Not suggested, not recomended.
Do it under your own risk..i know nothing about this amplifier working with that voltage you want to use.
I suggest you to find another amplifier to assemble, as i cannot help you using different voltages... and i believe that will be super unstable with such big voltage.
90 plus 90 volts is a very dangerous voltage...my amplifiers were not made to such kind of operation...try something from Rodd Elliot... this voltage can kill someone.
I will not stimulate, nor support, modifications into the schematic.
Carlos
Re: i liked your video on youtube
Hello
You need lot of experience to made an amp using +-90Vdc , and it is lethal if you make any mistake.
You would need at least 150V capacitors for the power supply, a lot of output power transistors in parallel and a very big power transformer, that will cost a lot.
Here is a thread about those type of amps, they explain usefull things to know before doing big amps like that and they will answer to any of your questions.
http://www.diyaudio.com/forums/showthread.php?threadid=111472&highlight=
I think you should not do a 90v amp before having much more experiences in diy amps making.
Bye
Gaetan
ozracing said:
Hello
You need lot of experience to made an amp using +-90Vdc , and it is lethal if you make any mistake.
You would need at least 150V capacitors for the power supply, a lot of output power transistors in parallel and a very big power transformer, that will cost a lot.
Here is a thread about those type of amps, they explain usefull things to know before doing big amps like that and they will answer to any of your questions.
http://www.diyaudio.com/forums/showthread.php?threadid=111472&highlight=
I think you should not do a 90v amp before having much more experiences in diy amps making.
Bye
Gaetan
Thank you Gaetan...i am glad to see you once again
I am working in cooperation with Stee...he is developing a revolutionary amplifier.... a secret schematic for a while... and he is rigth Gaetan..not doing this way, soon we would have several copies around.
Very creative that man, Stefano..... i hope we will have a sample of his designs for our use too.
regards,
Carlos
http://www.youtube.com/watch?v=fknFmDLWIow
I am working in cooperation with Stee...he is developing a revolutionary amplifier.... a secret schematic for a while... and he is rigth Gaetan..not doing this way, soon we would have several copies around.
Very creative that man, Stefano..... i hope we will have a sample of his designs for our use too.
regards,
Carlos
http://www.youtube.com/watch?v=fknFmDLWIow
thank you 🙂
for the info you provided but im going to start with DHR turbo amp them im going to move on (i think)
if destroyer x will make a new amp and a more powerful i will stay on destroyer x 🙂
for the info you provided but im going to start with DHR turbo amp them im going to move on (i think)
if destroyer x will make a new amp and a more powerful i will stay on destroyer x 🙂
To the ones are writting to me asking for Nordic
I do not know where Nordic is... since last year i had no news about him.
This pcboard was made by him...used for Dx Amplifier and HRII
regards,
Carlos
I do not know where Nordic is... since last year i had no news about him.
This pcboard was made by him...used for Dx Amplifier and HRII
regards,
Carlos
An externally hosted image should be here but it was not working when we last tested it.
Thank you Ozracing..but i think i will not make anything bigger
or publish here.
I am studying Class D.... something already in tests... a matter of time to produce high power in class D.
regards,
Carlos
or publish here.
I am studying Class D.... something already in tests... a matter of time to produce high power in class D.
regards,
Carlos
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