just post your last schematic.
They're power transistors set up as followers with some added filtering. Don't use the zener without it...
Simpler the better... op amp choice doesn't matter? Some advice.
You can do it pretty simple, research it, also research CRCRC filters.
It all matters, they key is to do it within your ability/cost, and not overcomplicate without worthy benefits. That's good design.
You could also try batteries just for kicks
Don't forget to make the ground common.
Simpler the better... op amp choice doesn't matter? Some advice.
You can do it pretty simple, research it, also research CRCRC filters.
It all matters, they key is to do it within your ability/cost, and not overcomplicate without worthy benefits. That's good design.
You could also try batteries just for kicks
Don't forget to make the ground common.
classd4sure said:
hhhmmm too late a post? hhehehe nah.. no big deal..
anyway, NE5532 is -=the best=- I could find in our area... I dunno if the store where I buy parts, would order them...
jsut told them, "try to have this n that" anyway, IS IT normal?? 10mV output of op-amp??? I can go ac coupled with that.. there IS space for 22uF on the board... man, dialup sucks! can even open photobucket yet...
here is the op-amp buffer I made.... still in debug mode....
upper half of board is NE5532 + signal coupling caps.... lower half is boosted zener regulator....
An externally hosted image should be here but it was not working when we last tested it.
upper half of board is NE5532 + signal coupling caps.... lower half is boosted zener regulator....
after =========MUCH========= tweaking of this DIY UcD amp, made some measurements... Dc offset(speaker terminal) is -0.6mV.. input is NOT grounded... I just =muted= CD player headphone output volume.... 
note: no op-amp input buffer
=finally did it!!= ..... now almost all parts are cooler to the touch than before...
on the input buffer (NE5532), its works with UcD amp... BUT i cant still connect it with coupling caps bypassed.... need to tweak it STILL.... I GOT DC!! yuck!! YES, buffer provides addtl gain.. though I DID hear a -slight- difference in tonal quality...
.... Its the only BEST op-amp I can find here.. but that dont bother me, as long as it works... still need some more tweaking (op-amp buffer) though.....
AND why I still dont use it with UcD??? boosted zener regulator for the op-amp HEATS!!! I used 2N5551/2N5401 ONLY!!! yes bad move too small power a transistor... might as well use TIP31C and its PNP counterpart.... btw, supply for NE5532 is only +/-9VDC... but it works.. I wish someone would send AD8620 as advance christmas gift.. hahah
worthwhile D-AMP to make... it never EVER wasted my time... and I learned a lot from it too...
Regards,
Raff
note: no op-amp input buffer=finally did it!!= ..... now almost all parts are cooler to the touch than before...
on the input buffer (NE5532), its works with UcD amp... BUT i cant still connect it with coupling caps bypassed.... need to tweak it STILL.... I GOT DC!! yuck!! YES, buffer provides addtl gain.. though I DID hear a -slight- difference in tonal quality...
.... Its the only BEST op-amp I can find here.. but that dont bother me, as long as it works... still need some more tweaking (op-amp buffer) though.....AND why I still dont use it with UcD??? boosted zener regulator for the op-amp HEATS!!! I used 2N5551/2N5401 ONLY!!! yes bad move
too small power a transistor... might as well use TIP31C and its PNP counterpart.... btw, supply for NE5532 is only +/-9VDC... but it works.. I wish someone would send AD8620 as advance christmas gift.. hahah worthwhile D-AMP to make... it never EVER wasted my time... and I learned a lot from it too...
Regards,
Raff
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