sr2002 said:i am using the br100 schematic. and i have just added 2 zobel networks
at the outputs of the two chips on both boards.
i have done p2p connections. i am using carlosfm's unregulated psu for chipamps. i have also added 100uf + 100nf caps between -v &ground and +v & ground.
i havent added anything at the input. do u think adding caps at the input will help?
actually the highs r good enough but the thing is when i pump the volume the tweeters seem to distort.(i am using sony hifi speakers)
but the thing is the speakers seem to work fine on my 65rms harman/kardon ht receiver.
so is this amp more powerful than my harman/kardon?
but the thing is i hae hardwired everything together. so like its impossible to take the zobels off. i have attached the pic of my zobel.
and wut exactly is the purpose of a zobel?
i dont understand the thing about gain resisters that u said (i am a newbie) how do u adjust the gain i mean is it really needed?
and probably i think the problem might be with the speakers as u told. i might be pushing then too much.
i am using 25-0 25-0 trafos. after rectification the voltage is 35-0-35v and 10amps.
do u think i need some fan cooling?
and u didnt tell me about the mute pin? i am using 30k resistors at mute pin. everyone else has used just 10k. does this affect anything.?
sr2002 said:hey i just checked the an-1192 file. it says that i should use +/-37v for 16ohms load.
and my psu is +/-35 10 amps(5amps on each rail) . but i am using 8ohms speakers
do u think i should drop the voltage?
how do i do that?
or maybe can i add a resistance at the input? wut value?
i also wanted to add a led can u tell me wut values of resistance should i use for the led
sr2002 said:is it ok if i put the led between +30v and ground with a series resistor of 4.7k?
and as drbobee said i should use a 0.5watt resistor right?
i have used Rf as 47k for one chip and 51k for the other.
and Ri is 4.7k.
and i also wanted to ask that, this is a 2 channel amp. that is i have made 2 such boards out of 4 lm3886. so i should connect these in paralell with the psu right?