squalle

amazon has it too IIRC, it's USD 17

regarding the noise when my amp is off: It's confirmed that the culprit is my prev power supply. now running using the PSU of my PC

kross: do u have other source to use? CD player? hm, I've just found out that my first prob of oscillation was caused by defective op-amp. then out of the stash I've got I managed to picked out 2 of them that are defective. both gave the same type of oscillation, very very terrible distortion in the lower freq. the other chips are OK. btw, all chips I've tested all are of the same model, tho' in 2 different prod batches. I guess you might have same prob? Do you have other chips to try? one more thing, I've got a prob when I off the amp, with 0 source; then I'll have hissing and slight screeching noise on the headphone, no matter which cans I used. However, when I turn the amp back on, still no source, the noise is gone. Can I confirm with any1 here that this prob is due to my power supply? apparently not from batt. the power is being taken from power adapter of an external HDD casing, modified by adding 4,000 uF.

alu casing was hand made. hehe still need to continue for the cover part.. knob was bought from koba hmm, I did my test run using a pair of earphones, very cheap one. haha 2 bux one. dun even wanna use the default ipod earphones u're still having the problem? pm me ur msn contact if u have one. I'll see if I can help you

I've got that prob initially. But as I've fixed the board + all the I/Os and the pot, the hissing and very subtle oscillation are gone now. I guess all due to the ground loop prob. as my casing is made of alu, somehow it helps to eliminate the ground loop now burning-in the amp hmm is there any need to burn-in an amp actually? anyway, here's the pic of my 1st DIY amp: lacking of the top part. havent finished yet

well I just got 3 pieces from him personally. just be a lil bit more patient.. tropical is one such nice guy upz for jason n tropical! starting to solder components now