diyAudio

diyAudio (http://www.diyaudio.com/forums/)
-   Solid State (http://www.diyaudio.com/forums/solid-state/)
-   -   QUASI Amplifier for Beginners (http://www.diyaudio.com/forums/solid-state/167394-quasi-amplifier-beginners.html)

apexaudio 24th May 2010 11:54 AM

QUASI Amplifier for Beginners
 
3 Attachment(s)
Quasi complementary amplifier based on old Dynacord. For begginers Class B without adjust.

apexaudio 24th May 2010 04:50 PM

I use this circuit many times in the past for quick build 100-500w amp with parts which I already have, work every time, low cost and even begginer can do it as first amp ever. With two 2N3055 on +/-30V DC you can have 60W amp.
Regards

qsa 24th May 2010 06:53 PM

Quote:

Originally Posted by apexaudio (Post 2197117)
I use this circuit many times in the past for quick build 100-500w amp with parts which I already have, work every time, low cost and even begginer can do it as first amp ever. With two 2N3055 on +/-30V DC you can have 60W amp.
Regards

Is it cost effective quick build by yourself ?

,... because in our country to buy commercial similar amp from China is cheaper than semiconductor parts in our country for quick build

apexaudio 24th May 2010 09:26 PM

Quote:

Originally Posted by qsa (Post 2197234)
Is it cost effective quick build by yourself ?

,... because in our country to buy commercial similar amp from China is cheaper than semiconductor parts in our country for quick build

I agree DIY isn't cost effective hoby, fishing is much better ;)

apexaudio 24th May 2010 09:48 PM

On the other hand any diyer have some old case, transformer, heatsink... only two new pcbs is needed for build functional amp, and have fun.
Regards

apexaudio 24th May 2010 10:29 PM

Quote:

Originally Posted by apexaudio (Post 2197371)
I agree DIY isn't cost effective hoby, fishing is much better ;)

Fisherman told me fishing isn't cost effective hoby, better buy fish :)

apexaudio 25th May 2010 12:46 PM

PSU from http://www.diyaudio.com/forums/solid...plifier-4.html with protect and clip also can be used for this amp.

FLT 30th May 2010 03:56 PM

scaled down version?
 
Quote:

Originally Posted by apexaudio (Post 2197117)
I use this circuit many times in the past for quick build 100-500w amp with parts which I already have, work every time, low cost and even begginer can do it as first amp ever. With two 2N3055 on +/-30V DC you can have 60W amp.
Regards

Hi,

nice circuit. What about two 2N3773? 120W?

Frank

apexaudio 30th May 2010 04:40 PM

Quote:

Originally Posted by FLT (Post 2202551)
Hi,

nice circuit. What about two 2N3773? 120W?

Frank

For single pair 2N3773 use +/-40V DC rail voltage.

jaycee 30th May 2010 05:01 PM

I have to honestly say that I dont think "beginners" should be building powerful amps. I also don't see why theres no adjust - a resistor, a trim pot and a transistor dont exactly add a lot of complexity to the circuit.


All times are GMT. The time now is 03:56 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