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...
so u mean with 40-45vrms the stepper dosn't work rite? still on mv and after clip not switch to hv iam rite?
and u sure the gv is there, i mean on stepper. if yes.. it must working. like another suggest try it first and see what happen, with ZF15V the clip work if output get 40vrms but u not get it, so try to use PL12Z and see what happen.
No,the spikes appears at 32-33Vrms on output.I say on 40-45 VRms the amplifier work well like temperature but the spikes are still there.i will put some pictures to see what is happens with graphic when the stepper make the switch.
My case is same like in this video
http://m.youtube.com/watch?v=yDeoWq8Cw7s
Maybe mister Mile know the problem
My case is same like in this video
http://m.youtube.com/watch?v=yDeoWq8Cw7s
Maybe mister Mile know the problem
The spikes are resulted by the switching. Maybe You have to slow down the switching little bit. Too fast switching makes this kind of glitches, because of the internal capacitances of the semiconductors.
Sajti
Here is some picture with my Apex H900 results
1.Sine wave before switching
2 Sine after switching
3. Square wave on input at 10 Khz
4. Square wave on output at 10Khz
Please ,any suggestion ?What i must do?
1.Sine wave before switching
2 Sine after switching
3. Square wave on input at 10 Khz
4. Square wave on output at 10Khz
Please ,any suggestion ?What i must do?
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.
An externally hosted image should be here but it was not working when we last tested it.
Last edited:
Hello friends,
Can anyone please provide me all the PCB design like PSU,circuit PCB board and other files.Its hard to find these files in so many pages
I too want to build this amp
What is the difference between v1 and v2 of this amp?
Thanks
Hello trac911
Pls. Read this thread from the very beggining. All was detailed here.
Can anyone please provide me all the PCB design like PSU,circuit PCB board and other files.Its hard to find these files in so many pages
I too want to build this amp
What is the difference between v1 and v2 of this amp?
Thanks
Hello trac911
Pls. Read this thread from the very beggining. All was detailed here.
Hello friends,
Can anyone please provide me all the PCB design like PSU,circuit PCB board and other files.Its hard to find these files in so many pages
I too want to build this amp
What is the difference between v1 and v2 of this amp?
Thanks
Hello trac911
Pls. Read this thread from the very beggining. All was detailed here.
Can anyone please provide me all the PCB design like PSU,circuit PCB board and other files.Its hard to find these files in so many pages
I too want to build this amp
What is the difference between v1 and v2 of this amp?
Thanks
Hello trac911
Pls. Read this thread from the very beggining. All was detailed here.
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
http://www.diyaudio.com/forums/solid-state/162408-900w-h-class-pa-amp-limiter-291.html#post3913011
hi iiee try the above on post #2908 which does not use ir ic
Last edited:
R21:100e resistor blown
sir mile is this H900 circuit corrected or not. because my r21 100e resistor blown at first start up with series 100 w bulb and my friends H900 channal also giving crack sound
pls pls pls help me out sir I have to powered my boxes soon I made 12 pcb's and first pcb have that problem I feel lost of confidence due to that
sir mile is this H900 circuit corrected or not. because my r21 100e resistor blown at first start up with series 100 w bulb and my friends H900 channal also giving crack sound
pls pls pls help me out sir I have to powered my boxes soon I made 12 pcb's and first pcb have that problem I feel lost of confidence due to that
Check your Q4, Drivers and output transistors, there must be shorted somewhere, Also post some pictures so other diy friend can help you.
E-C-B Means you got a suffix "-C" transistor means center collector, If transistors still ok then you can change the pin orientation and follow the schematic accordingly.
