My first Headphone amp build

[krish2487]

Hello..

I am a long time lurker with very few posts.
Finally i mastered the energy to get my lazy butt out of the chair and build a headphone amp.

I used a Texas Instruments TPA1517 for the amp.

Below are the results.

It is not fully complete as i have only finished fabricating the board.
The chassis and the works are in order.

Ladies and gentlemen
presenting
HDamp
(Pun intended.)


Hdamp layout


PSU Board


Amp board



The PSU receives its supply from a 10va trafo with 12-0-12 stepped down from 230-0

The 12-0-12 is rectified , and regulated (7815) and filtered


PS: it is my first time building something and that too with SMDs


feedback is appreciated

[pacificblue]

Does the 7815 not run hot? 24 V AC is quite a lot to produce 15 V DC. And 2 channels with 4 A peak output each are also a lot for a 1 A regulator.

[kuldeepsingh]

good, how are sonic results . . .

hey did u made the PCB at home, if yes , can u tell me how you do tinning (silvering) of the PCB.

[krish2487]

@pacificblue
it does
but i m not using a 4 ohms load.
i am using it to drive a 32 ohms headphone load.
the only heat dissipated is the difference between the input voltage and the regulated output.
i am using it with a heatsink, i have just not shown it in the picture
once the chassis is finished i will post updated pics again.

@kuldeep
I have tinned it using lead, 25w soldering iron and a solderwick

the fastest and least cumbersome way to tin it..

[kuldeepsingh]

Originally posted by krish2487

I have tinned it using lead, 25w soldering iron and a solderwick

hi, can u tell me in detail, i've been looking for such a thing for quite a long. "lead" means u used any solid lead piece along with solder wire?

[krish2487]

@kuldeep
no mate.
i used plain , run of the mill solder wire (60-40)

first
apply flux to the entire board.

let the iron become hot.

tin it

not take a small quantity of solder onto it

Let the flux core evaporate( i assume you are using rosin core solder)

now use the iron as a paintbrush and coat the entire board in fast, small strokes

Cover only a small area once

and DO NOT use excess solder.

You are only trying to tin the board not solder anything onto it.

(A small droplet of molten solder can be used to coat a 1 inch x 1 inch copper clad fully.)

Now flux the solder wick

Now use the solderwick as a mop to remove the excess solder,if any, over the tinned tracks.

It is pretty easy mate.
Do one board and you will get the hang of it from the second board itself.

PS : Do search youtube for "tinning"
It will give some helpful results


meanwhile see the video
It is much more useful than a page of writing..

http://www.youtube.com/watch?v=i32f5_0hXQU

[kuldeepsingh]

thnx, the video is good

[krish2487]

this video explains the entire process in detail mate..

give it a look

[krish2487]

sorry forgot to add the link..




http://www.youtube.com/watch?v=Wa0aU...eature=related