diyAudio

diyAudio (http://www.diyaudio.com/forums/)
-   Chip Amps (http://www.diyaudio.com/forums/chip-amps/)
-   -   Noob wanting to build chip amp, help appreciated (http://www.diyaudio.com/forums/chip-amps/236465-noob-wanting-build-chip-amp-help-appreciated.html)

nubskillz 23rd May 2013 04:38 PM

Noob wanting to build chip amp, help appreciated
 
Hey guys, I'm looking for an easy to follow chip amp design that i can wire point to point and hopefully acquire everything off the shelf at the usual electronics stores (fry's/ratschack/allelectronics,etc...)
I am very interested in the audiosector gainclones, but i was wondering if theres something even easier i can achieve. I have some free time today and i wanted to go component shopping, and hopefully build the amp by tonight.
Although i am totally ignorant when it comes to electronics, I am not bad at assembling and soldering things. I can follow instructions very well, so no amp would be too difficult as far as the documentation is there.
Most of all, i need a BOM i can drive around and try to fill out, any help?


PS. I'm not worried about the power supply right now, but what kind of home device should i be ripping apart for a worthwhile transformer for the psu? i have a few....

ByronInPortland 23rd May 2013 05:22 PM

do you mean something like this?
Mick Feuerbacher Audio Projects
Personally, I would get the PCBs. You can buy two LM3886 boards and two power supply boards from Chipamp.com for $24.00. LM3886 Amplifier Kit | Chipamp.com

picowallspeaker 23rd May 2013 05:43 PM

yes, you should think of the transformer first.
Then about the rectifier diodes ( bridge) and then the capacitors.
That's the PSU- power supply unit
The amplifier is just a bunch of components attached to the PSU !

So if you find a 9 V-15 V transformer, having enough current...about 2-3 A
You can look at some chips amp made for mobile applications.
With a 16-25 V transformer you can have more power ( usually some chips have a 36 V limit, like the LA 4450 )
Then you can find a transformer with a center tap, which is needed to produce
dual tensions and it is needed to power capacitor output less amplifiers, such as the LM 1875 etc.

nubskillz 23rd May 2013 06:05 PM

Thanks for the help guys... i know this is sacrilege but i have a Beomaster 3300 receiver that started hissing and I'm not against taking the tranny out of it. I'm not sure about the values, im gonna do some digging.

Pico, sei italiano?

nubskillz 23rd May 2013 06:10 PM

Quote:

Originally Posted by ByronInLawrence (Post 3501950)
do you mean something like this?
Mick Feuerbacher Audio Projects
Personally, I would get the PCBs. You can buy two LM3886 boards and two power supply boards from Chipamp.com for $24.00. LM3886 Amplifier Kit | Chipamp.com

This is EXACTLY what i was looking for, thank you so much.
What kind of audio quality should i be expecting out of something like that? Lets just assume i have a good PSU to power it...

picowallspeaker 23rd May 2013 06:31 PM

Quote:

Originally Posted by nubskillz (Post 3502003)

Pico, sei italiano?

Of course...che discorsi !!

The majority of the chip amps are designed to fit into little space such
as TVs, radios, videogames or car headunits . What you earn in space saving
has some counterfeits in audio quality, as those chips are mostly hidden and
often they have a stand-by mode and some protections.

Since the power devices need to be fixed on a suitable heatsink, like any discrete transistor or mosfet amplifier, and they need the PSU, the complexity of the design may vary :confused::rolleyes::o
I mean, also the classical class A design from John Linsley Hood from 1969
needs only 4 transistors and a good ( regulated) PSU , for 10 W output.
It only needs to be done perfectly.

Ciao!

nubskillz 23rd May 2013 08:53 PM

Quote:

Originally Posted by picowallspeaker (Post 3502033)
It only needs to be done perfectly.

This is what I'm trying to achieve. I will investigate further and figure out the PSU, which seems as the primary building block of a good amp.

What I would like to hear more about are simple designs, like these you guys have already highlighted for me.
As I am new to the hobby any sort of information you guys might have on examples of simple to execute but high performance amplifier designs would be much appreciated. I don't need wattage, at the moment my main amp is a tda1517 based kit amp from vellemans running on eight AA batteries....
Kits are exciting too, I was just hoping to piece together a well known design without a pcb, but I'm starting to understand that kits are maybe a better option due to high component quality and ease of assembly for a first timer like me.

Thanks so much guys.

AndrewT 24th May 2013 10:58 AM

read Decibel Dungeon and ESP.

nubskillz 24th May 2013 05:58 PM

Quote:

Originally Posted by AndrewT (Post 3502860)
read Decibel Dungeon and ESP.

Half way through the PSU section on DD... forgive me, but what's ESP?

nubskillz 24th May 2013 06:53 PM

Nevermind, found it. Thanks.


All times are GMT. The time now is 09:12 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio


Content Relevant URLs by vBSEO 3.3.2