no offense but thats some pretty bad soldering (kinda like how I SOLDER)

i got my trans from rs (www.rsmalaysia.com)... u might wanna try Farnell too (my.farnell.com)

wow.. the kit look nice... but it doesn't come cheap... u might wanna play around with some lower budget tube first... check out this www.my3c.net

Jason no choise, i am using an solder which is 38CM long, and the solder head = 1cm wide, blade shape to do this small works. that is my daddy solder, he get that around 20 years ago in singapore, the tip is made with 100% copper.... and doesn't plan to get a new one. because i got mine in KL. hahaha =P


using a 1CM tip to do soldering work on a 0.9mm hole. but this one i made really cin chai because i wanna complete it really fast. =P but due to some part i bought mistakely, and failed to pair up the resistor, have to delay the amp progress another two weeks loh. =(


i built this on a normal PCB which can be found on malaysia. after i done this and confirmed that it work fine, will write a very detail step by step and component buying guide and post it here for anyone who interested to built a cmoy with part that they could find in malaysia.

This post has been edited by PcWork: Jun 6 2005, 11:02 PM

it's ok..first time, PcWork??

er.... not first time job with PCB, before this doing quite a lot work on modification on speaker amp PCB, changing some caps and wire on speaker,by pass this by pass that on speaker.. but first time on building headphone amp. becuase i am so slow on study that there's a nice amp that can be carry around. and i learn that after i come to lowyat.net

keep up the great work. We are waiting for your step by step tutorial here.

i will. hope it will help many ppl who interested to built an opaamp and don't know how to start.

you talking about me here? lol.
I cant even solder a wire to PCB properly.. how to build an amp for myself? hahaha.

here is a rough sketch of my amp's front panel:


missing part including:
1) input and output indicator
2) volume level indicator
3) indicator on each knobs

here is the raw casing:



it's gonna cost me RM150 to drill the inset and holes....then i most likely will have to deanodize the whole plate and reanodize it myself again gonna buy a battery charger to try it out soon.

PCWork, give you a tip!..clean off the solder flux residue with paint thinner, then the points would look bright & shiny!. use a chinese pen brush dipped in thinner then wash it off. Don't worry, it won't damage anything on the solder side.

These might help a lilttle, ok it is not DIY but DIY kits!

http://www.decware.com
http://www.bottlehead.com
http://www.passdiy.com/
http://www.welbornelabs.com/
http://www.octave-electronics.com/

For the ultimate design, I wud take this anytime.

http://www.electronluv.com/

This post has been edited by Techno_Gizmo: Jun 7 2005, 02:08 AM

oo..can't wait until finish..pcwork..post some picture..k? i got diy headphone...but already rosak. (1 is cmoy..1 is base lm386)

Alamaklor. I thought you only built headphones amp


Walau.. 2 piece of speaker can fill up my room. But it's worth it laa.. I rather sacrifice my bed space for speakers

dont let the size fool you, it is a headphone amp.
im wondering if i should make things simple and forget about making inset, deanodizing and reanodizing it....very mar fann and also wondering if it is ok to leave all input and output at the rear

blackflam i guess they are doing acoustic test on the speaker, that's now how we normally listen to it. some more i don't think it will sound good since it is 1 way speaker. =P

bsl555 : TQ. it really help a lot. =P

This post has been edited by PcWork: Jun 7 2005, 02:04 PM

Alamak, is your amp gonna have equalization?

modD i don't think his dynalo got equalization from what i study. if he want some equalizer i think he will built another one with another casing. rather than having an equalizer built in an amp.


dynalo = first class (class A) headphone amp leh... =)~

AlamakLor will build a pretty casing for his amp. But not for his naked PC.. lol. PaperBox casing

Of course, it is first class headphone amp. it definitely deserves it AlamakLor, If I order from you, issit almost same like this? Or portable ones like gavlim (in mint tin)

depent on what you order, if you order a "dynalo", just like the one he make for himself, it gona cost you more than RM 1K.

if you order a "cmoy" it will in mint tin, if you still like aluminium casing, you can ask him buy for you, cost around 11 USD. but surely the one aluminium look much more nicer.

p/s : Dynalo & Cmoy = different class of amp. cmoy is just beginer grade of headphone amp which sound relatively not bad. but dynalo = class A headphone amp.

and the casing he is showing here already cost RM 200++

This post has been edited by PcWork: Jun 7 2005, 10:58 PM

no integrated equalizer for this one. just that i'd make a gain switch to switch the amp into an active preamp.

i didnt design this amp, just assembled it. stuff that i make are all portable ones,a nd they all will be in extuded aluminium enclosure, actually much tougher than the one in the picture.