stereo amp, is a totally different thing, hardware wise, time wise, skill wise, etc....leave those things to the pros.

well actually, some of the headamps that's featured all over the net do have the output current enough to drive a pair of small bookshelfs.

some examples are the Eaton amp and the Morgan Jones tube amps.

Just completed my CMoy headphone amp... i would like to thank chernloon especially for giving me the website and many thanks to mikechai for my wonderful e-mu0404 soundcard...
and also ionstorm for guiding this noob here at recording

i used the opa2132 chip

love this small little amp.... DIY makes it even more lovable

bro...got pics?

ya..show some pics of ur baby

Ill post 2moro...
all A-OK... just need to drill the holes on my case

Congrats!

Now let it burn in then wait for your pics and reviews.

Did you make your opamp swappable?

merged threads.. congrats on building your new amp

what kind of casing that you're using? and any thoughts about building a more complex circuit?

M3 or PPA perhaps?

hey guys ive got some problems while mounting the circuit and everytihng on the casing....
after installing everything the righ channel wont work when amp is switched on!!! but when its off the left channel works and the right is dead silent

i check all the joints and stuff but still cant figure out teh problem...
help plss...

finally found out the source of the problem
its the metal zinc casing... both of the sockets are connect directly
guess ill have to buy a plastic casing... haizz more $$$

erm...put some pad under the circuit...

p/s: after looking ur amp 4 a while...just realize the pad..haha

This post has been edited by rioven: Sep 9 2005, 09:06 PM

i can't understand what you meant with this. the input/output sockets could be grounded together with the volume pots.

if you take it out of the case, does it work?

it works when i take it out of the case

In building any amplifier, the chassis, grounding and mounting it is a very important matter.

Bad quality chassis and grounding will contribute to high noise floor, unexplainable buzzes or hum and performance issues.
Google around in DIY places and observe how others build their stuff and exercise care.

i dont get any noise or hums at any volumn... just that when i mount the sockets on the casing the signal passes right through

does that happen? the case that i used is made of zinc

just mounted the amp onto a new plastic case... works well now


overall lesson learnt:
1) use bigger pots with stronger lugs
2) plastic casing
3) smaller gauge wires

had a real nice time assembling the amp...
gonna build another 4 more with the remaining chips

if you have that much more chips, i suggest you take a look at some better designs such as PIMETA/MINT/PPA or even the M3. i've ditched my PPA project after reading that M3 sounds much better. and i already ordered most of the parts for that project.

do u order the M3 pcb board from the amb page? i think the components available through there is cheaper than getting it in msia, morever some not available here. however i not sure how bout the import tax.

u got the schems fr tat?