peranders said:
Are you meaning about the t-network feedback? I do not understand you well. If you find any error please point out. I have not tested the circuit yet as clearly mentioned and warned anybody to build it. Also I already said before in this thread that I got help (directly or indirectly) from you too. But obviously the circuit is different from any circuit I have seen in the net.
the suggestions is here
http://www.diyaudio.com/forums/showthread.php?postid=512184#post512184
http://www.diyaudio.com/forums/showthread.php?postid=512184#post512184
people may (or may be not) be wandering what happend to the pcb design and construction of my gainclone project in this thread. unfortunately i packed my baggage from india and now dropped in duesseldorf, germany learning german. from june i will be in muenster for a long time.
any friend out there from germany and preferably from muenster who can help me continue my hobby here in germany.
roushon.
any friend out there from germany and preferably from muenster who can help me continue my hobby here in germany.
roushon.
When you finally get back to working on this:
I think it would be better for you to use 1 buffer chip for both parrallel amps because any difference between any resistors, or the OPAs themselves will cause the 2 amps to "fight" each other which makes extra heat, and may be part of the reason that parrallel chips have a bit more distortion.
as mentioned before, match all the components for the 2 amps as well as you can. (i brough my multimeter into the electronics shop once to do this, they did not seem to mind
)
and buy both of the chips at the same time, hopefully from the same tube so they are likely to be manufactured right after each other.
I think it would be better for you to use 1 buffer chip for both parrallel amps because any difference between any resistors, or the OPAs themselves will cause the 2 amps to "fight" each other which makes extra heat, and may be part of the reason that parrallel chips have a bit more distortion.
as mentioned before, match all the components for the 2 amps as well as you can. (i brough my multimeter into the electronics shop once to do this, they did not seem to mind
)and buy both of the chips at the same time, hopefully from the same tube so they are likely to be manufactured right after each other.
the pcb
The pcb design of the project (parallel of two inverted LM3886) in this thread is below. The circuit design is already here, so I am not attaching again. But the parts value may be little different in the PCB, without any harm.
This is the first time I am making a PCB for amplifier, so expecting there will be mistakes. Please give me your suggestions, corrections or comments. This is important for me.
The pcb design of the project (parallel of two inverted LM3886) in this thread is below. The circuit design is already here, so I am not attaching again. But the parts value may be little different in the PCB, without any harm.
This is the first time I am making a PCB for amplifier, so expecting there will be mistakes. Please give me your suggestions, corrections or comments. This is important for me.
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