...
Thanks for your response Andrew , yes i looked at the output waveform with an oscilloscope and at those low levels it was without a problem everything went smooth with a 1khz about 0.3v test signal at the input for about 3-5 minutes duration and then i turned the input to about 0.7volts or abit higher and the output blew instantenously. There wasnt even enough time for something to get that hot.
My theory is that at higher levels the output just opens up and the transistors make a short circuit and they fail ofcourse because of the huge current rushing through them.
Why this is happening is a mystery. I guess the transistors that control the bases for the output transistors gives too much voltage on the base and the output transistors just open up, but still why I donkt know.Maybe some high frequency distortion is going through them or somethin alike.
Ok could you say what you have in mind?
Thanks for your response Andrew , yes i looked at the output waveform with an oscilloscope and at those low levels it was without a problem everything went smooth with a 1khz about 0.3v test signal at the input for about 3-5 minutes duration and then i turned the input to about 0.7volts or abit higher and the output blew instantenously. There wasnt even enough time for something to get that hot.
My theory is that at higher levels the output just opens up and the transistors make a short circuit and they fail ofcourse because of the huge current rushing through them.
Why this is happening is a mystery. I guess the transistors that control the bases for the output transistors gives too much voltage on the base and the output transistors just open up, but still why I donkt know.Maybe some high frequency distortion is going through them or somethin alike.
Ok could you say what you have in mind?
Protect Speaker By APEX
I thank APEX previous to this. I tried to re-draw for speaker protector without changing the value of the components and just change the type of Relay with other models. if you are interested in the image that I created, you can send a message to my email at damanhuridalimunthe@gmail.com for this project.
Best regards.
Damanhuri.
I thank APEX previous to this. I tried to re-draw for speaker protector without changing the value of the components and just change the type of Relay with other models. if you are interested in the image that I created, you can send a message to my email at damanhuridalimunthe@gmail.com for this project.
Best regards.
Damanhuri.
Attachments
hi Damanhuri.
nice work,
if u don't mind pls share the top and bottom layouts in pdf.
I think Mile sir is too busy for vertex 
or he simply don't want to share it. 
Also we know that with a little help
of Mile sir two members have already dare built vertex successfully so far in this thread: 
http://www.diyaudio.com/forums/solid-state/199879-vertex-amp-apexaudio.html
So I hope the anxiously
waiting members who are ready for vertex could take help 
from successful builders of vertex. 
Well, that's the alternative .
Otherwise I would love
to see an official thread of vertex launched by Mile sir.. 
or he simply don't want to share it. Also we know that with a little help
of Mile sir two members have already dare built vertex successfully so far in this thread: http://www.diyaudio.com/forums/solid-state/199879-vertex-amp-apexaudio.htmlSo I hope the anxiously
waiting members who are ready for vertex could take help from successful builders of vertex. Well, that's the alternative .
Otherwise I would love
to see an official thread of vertex launched by Mile sir.. 
