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Class a amp

Mogami Cables

amallalone

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Feb 27, 2016
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38
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india
Want to do class a amp for elac debut 2.0..need help from seniors..N. B -almost 0 Knowledge AT ELECTRONICS
 
Last edited:

sadik

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Jun 14, 2015
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Vadodara
If you are new don't go for a DIY way assembling all the components on PCB by yourself, changes of wrong placement and dry solder are higher. Get yourself a pre assembled kit. Secondly I will not recommend Class A Amp for a beginner. I will recommend you to go for a low power class AB or Chip based amp first.
 

amallalone

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Feb 27, 2016
Messages
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Location
india
Do you mean pure Class A or Class A/B amplifiers?
Class a

If you are new don't go for a DIY way assembling all the components on PCB by yourself, changes of wrong placement and dry solder are higher. Get yourself a pre assembled kit. Secondly I will not recommend Class A Amp for a beginner. I will recommend you to go for a low power class AB or Chip based amp first.
Yes.. I would like to go pre assembled way.. But any idea where I can get pre-assembled class a kits
 

jls001

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Feb 9, 2010
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Class A is very challenging from mechanical point of view. Large heat sink for dissipating the heat automatically makes the cabinet large, huge capacitor bank raises cost of parts substantially, etc. I would go with a great class AB like PeeCeeBee v4H. I think the group buy is still on at diyaudio. Since the designer is in India (Kolkata) one can pay in INR. Also both the two boards for left and right channels can be had preassembled and tested by the designer himself. Ditto the power supply board (cum speaker protection circuit) which can be had preassembled and tested (for extra cost).
 

surfatwork

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Aug 7, 2007
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Kochi
Class A is very challenging from mechanical point of view. Large heat sink for dissipating the heat automatically makes the cabinet large, huge capacitor bank raises cost of parts substantially, etc..
True. The challenge with class A is not the soldering. It is the chassis and wiring, and to some extent the biasing process if one isn't familiar with it.
 

SanjeevM

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Mar 28, 2017
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Bhopal
I will suggest that you try out a simple Class-D module like a TPA3118 to get the basic knowledge and experience first. Class-A amplifiers sound very pure, but are hot and heavy 'beasts', not easy to tame.
 

Aniket

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Dec 24, 2013
Messages
252
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Delhi
Hi,

I have some PCB's to spare of stereo Class AB amplifier. power output is 70+70 W into 8 ohms and 120 + 120W into 4 ohms, SNR > 109dB, THD < 0.01% at rated power. it has power supply and protection circuit inbuilt. no wiring hassles so, would be easy for you to have a working amp as you would need only power transformer, enclosure and in out connectors in addition.

Regards,
Aniket
 

flat_listener

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Joined
May 4, 2015
Messages
247
Points
43
Location
Hyderabad
Hi,

I have some PCB's to spare of stereo Class AB amplifier. power output is 70+70 W into 8 ohms and 120 + 120W into 4 ohms, SNR > 109dB, THD < 0.01% at rated power. it has power supply and protection circuit inbuilt. no wiring hassles so, would be easy for you to have a working amp as you would need only power transformer, enclosure and in out connectors in addition.

Regards,
Aniket

Are these populated boards... what is the power supply needed?
 

flat_listener

Active Member
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May 4, 2015
Messages
247
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43
Location
Hyderabad
Great!

Would like to build one stereo amp for my bookshelf spkrs...
Can you pl let me know the cost of the kit.

Regards
 

Hari Iyer

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Feb 8, 2010
Messages
3,145
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Location
Mumbai
If class A is still in your mind, I have the Beta 22 A audiophile class A amp PCB with power supply board. PM me for further details
 
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