for everybody want to try at home...
thanks suryad i will try it it is hard to get ir2117. and i have serious issues with classd inductors . it is time i tried h.
hope with tlo71 it is clear
Attachments
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diyaudio.com 900W H-class PA Amp with Limiter pg 256 B500_TO_H900@_LAYOUT.PNG -
diyaudio.com 900W H-class PA Amp with Limiter pg 256 B500_TO_H900@_PARTS.PNG
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diyaudio.com 900W H-class PA Amp with Limiter pg 253 DSC_0539.jpg -
diyaudio.com 900W H-class PA Amp with Limiter pg 254 197609d1290487375-900w-h-class-pa-amp-limit.gif -
diyaudio.com 900W H-class PA Amp with Limiter pg 253 DSC_0541.jpg
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thanks suryad i will try it it is hard to get ir2117. and i have serious issues with classd inductors . it is time i tried h.
hope with tlo71 it is clear
nice work.. tell me if this work great.
Hello sir Mile!
I need a little help!
I just finish my Apex H900 but i have a problem,i use a 4kw smps power supply with +/-110V and +/-55V
I put sinusoidal signal on input and when the steppers make a switch from low to hi the sinusoidal form have some spikes (at 32-33Vrms on output)and on square signal if i put up from to 1Khz the the square from goes like triangle...
Please tell me what i must change or what is the problem
Best regards!
Ciprian
I need a little help!
I just finish my Apex H900 but i have a problem,i use a 4kw smps power supply with +/-110V and +/-55V
I put sinusoidal signal on input and when the steppers make a switch from low to hi the sinusoidal form have some spikes (at 32-33Vrms on output)and on square signal if i put up from to 1Khz the the square from goes like triangle...
Please tell me what i must change or what is the problem
Best regards!
Ciprian
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
Spikes problem
Hello again mister Mile!
I receive an oscilloscope and i test my Apex H900.
My power supply is a 4kw SMPS with +/-110V and +/-55V
All is fine before the steppers make the switch from low to hi
I put sinusoidal wave form on input and on 32-33Vrms on output appear some spikes
On square signal after 1khz the square form takes a triangle form
Please tell me what could be the problem or where i must make changes?
Thank you!
Hello again mister Mile!
I receive an oscilloscope and i test my Apex H900.
My power supply is a 4kw SMPS with +/-110V and +/-55V
All is fine before the steppers make the switch from low to hi
I put sinusoidal wave form on input and on 32-33Vrms on output appear some spikes
On square signal after 1khz the square form takes a triangle form
Please tell me what could be the problem or where i must make changes?
Thank you!
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
Hello again mister Mile!
I receive an oscilloscope and i test my Apex H900.
My power supply is a 4kw SMPS with +/-110V and +/-55V
All is fine before the steppers make the switch from low to hi
I put sinusoidal wave form on input and on 32-33Vrms on output appear some spikes
On square signal after 1khz the square form takes a triangle form
Please tell me what could be the problem or where i must make changes?
Thank you!
An externally hosted image should be here but it was not working when we last tested it.An externally hosted image should be here but it was not working when we last tested it.An externally hosted image should be here but it was not working when we last tested it.
how much dc offset without input sinyal?
and im not see caps 100n between input ground and supply ground.
sorry my mistake, i see that cap 100n. hey, ur u sure u put mje tr on rite direction?
sure,all components are in good position (diodes,transistors and capacitors)
The amplifier sounds ok on speakers (i didn't put volume until 32-33 Vrms on speakers) but oscilloscope say the truth
I use 8 ohms dummy resistors for load and i let him at 40-45 Vrms on output and no component getting to hot,the temperature is ok
Some one tell me to change the zener ZF15V from bases of 2sc5200 and 2sa1943 and try with PL12Z zener and PL18Z zener to see what is happens
Another thing,if i shortcut the source with drain from mosfet's ,amplifiers working great but then i have only Class AB
In my case the step up translation is not working well that is clear...
The amplifier sounds ok on speakers (i didn't put volume until 32-33 Vrms on speakers) but oscilloscope say the truth
I use 8 ohms dummy resistors for load and i let him at 40-45 Vrms on output and no component getting to hot,the temperature is ok
Some one tell me to change the zener ZF15V from bases of 2sc5200 and 2sa1943 and try with PL12Z zener and PL18Z zener to see what is happens
Another thing,if i shortcut the source with drain from mosfet's ,amplifiers working great but then i have only Class AB
In my case the step up translation is not working well that is clear...