hi audiocats! awsome project there, thank you for this inpiring build and cool tips. have you tried winding the other side(primary/secondary side) on top of the other for better coupling? not sure if it would translate to better coupling (perhaps) and improvement. I sure do want to try this one.

Hi jcx,can you recommend a core material suitable for audio? What are the things that i need to look for in the specs when choosing the right material? Will toroid core do for such application? I would like to try my hands on this. Appreciate your help. Thanks.   And by the way thanks to...

doobooloo, congratulations! very well made. is that the alpha potentiometer? where do you source this pot?

jumped in the zune band wagon several months ago...actually my first ever dap. the decision was a gamble on my part knowing that line out is activated via firmware. but still hoping that one day a hack will be available for this. pretty much satisfied with it.

i want to try a simple cheap balance rig and the balanced cmoy comes to mind. searching the diy forum i found amb's circuit diagram for a balanced output amp with an unbalanced inputs. the gain resistor values are pretty much easily substituted depending on your preference. my question is...

hi luvdunhill, you might want to check out the lightspeed attenuator. no experience with it but it seems to have picked up a lot of interest at diyaudio. could be configured as balanced as well, although you have to be aware that ldr matching is pita. dont let this discourage you, who knows you...

hi splaz, i assume that you are referring to electrolytic capacitor. there could be a number of reason why that particular part was chosen. it could be that for the rated voltage, the ESR (Equivalent Series Resistance) is small. or the designer opted to provide a good operating voltage(peak)...

hi dumbears, maybe you could try out dr. meiers solution he used on the updated headphone amp that appeared in headwize (uses LM6171 from national semiconductors). check out this link, hope it helps: http://www.meier-audio.homepage.t-online.de/headamp.htm

hi sanaka, heres a list of links that i came across while looking for information on binaural mic. hope this helps. http://www.pitt.edu/~szekeres/mic/mic.htm http://orca.st.usm.edu/~jmneal/preamp1.htm http://www.minidisc.org/mic_preamp/S...c%20Preamp.htm I have not build any of them yet...

come visit this site and download a handy software for your offline conversion needs: http://www.engnetglobal.com/

same experience i have was on a power supply with organic polymer (similar to oscon) e-cap connected in reverse polarity. whats strange here is the e-cap did not fail for a long time (months of continuous operation). ripple output and regulation was not affected. the organic polymer could have...

Quote: Originally Posted by kin0kin Many articles that I have read regarding bypass-capacitors would use ceramic/tantalum caps for analog circuit....was just wondering why are most of the bypass-capacitors in diy amps such as pimeta, ppa, and etc uses polyester film caps instead. as...

Garbz, I am most delighted to receive my plugs today! Thank you for the great selfless effort to make this group buy a possibility. Big thanks to Dr. Jan Meier for giving us folks a chance to DIY our own senn cable!

yes, e-caps should not be operated way below the rated voltage. operation at low voltages causes the aluminum oxide dielectric to thin (reform), which alters the capacitance and break down voltage. This has the same effest as storage without any dc bias (for years), although much slower. This is...

hi, the metal platting could be giving you problem. sand paper the portion you intend to solder to expose the base metal. I hope this helps.

i've seen that the meta42 has buffer in its power supply. for simplicity why not use IC buffer instead of discrete diamond buffer? this is a good bet if space is a premium. but i'm not sure how to implement this in 3 channel amps. i think your idea is really good, if i have the time i would like...

hi garbz, I dont know what difference in the the weight will cutting off the excess wires of the plugs (leaving only enough wire for the solder joint connection). Will the weight be significant savings as well as reducing the bulk of the package? If you think that this will be a big benefit...

garbz, please reserve 10pcs for me. will send you pm for details. thanks.

dan, please advise your shipping address and send it via pm. will probably send you stuff right after i get back. thanks!

pinoy here!!! nice to see you all here!

even if we have the pins will making the plug mold to hold the pin be possible for diy? it would be easy if a mold plug (which could be dismantled without destroying) something like the ones used by zu mobius be made available also. this will make it reusable and it would look way much better...

wow! this is awesome, i cant wait to get my hands on those boards. keep it up dan.

misterx, thank you for such a superb job. i must admit i screwed up on my payment (and i suck) and yet you have gone the extra mile just to deliver the pcb without receiving my payment yet. it could have been really easy if you have drop me off the list since i was not able to answer to your pm...

jefemeister's suggestion is very practical and the same method i use. but if you have two soldering iron with fine tip, you could use them like tweezer to pull out smd components like resistor /capacitor. for smd chips, what i do is lift up the legs one or two at a time with sharp pointed...

hi stromie, using an isolation box for the transformer is a good idea. add to it some damping material will help subdue mechanical vibration as well as shown in: http://www.wadia.com/technology/tech_guide.htm#MA a really nice site in which you could borrow a number of ideas. please us keep...