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Building the most straight forward layout Class A

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Hi-Fi 4 Sale - Malaysia / Singapore Audio Forum & Marketplace | www.hifi4sale.net :: Discussion Forum & Knowledge Base :: DIY Projects

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Building the most straight forward layout Class A Empty Building the most straight forward layout Class A

Post by chchyong89 Thu Oct 15, 2020 10:21 pm

The design philosophies is to make a class A amplifier that look simple, straight forward, clean, neat, very low part counts and sound great of coz!

1. Below is the PCB layout i drawn, with all the connectors and components on the board. So there will be no flying wires from bridge rectifiers,  connectors etc. 
Building the most straight forward layout Class A 111

2. FR4 2.0 2 layer PCB. Well fabricated from china for sure, because they are fast and cheap! 
Building the most straight forward layout Class A 211

3. I-beam 6061 aluminum with black anodized, the most suitable candidate I found for the chassis.  tongue
Building the most straight forward layout Class A 311

chchyong89
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Building the most straight forward layout Class A Empty Re: Building the most straight forward layout Class A

Post by chchyong89 Fri Oct 16, 2020 12:33 am

4. solid and beautiful aluminum feet
Building the most straight forward layout Class A 410

5. Got it hooked up. 
Building the most straight forward layout Class A 510

6. 400VA 4kg transformer!
Building the most straight forward layout Class A Img_2026

chchyong89
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Building the most straight forward layout Class A Empty Re: Building the most straight forward layout Class A

Post by chchyong89 Fri Oct 16, 2020 12:38 am

7. Heavy Transformer now is on it!
Building the most straight forward layout Class A Img_2027

8. push pull mosfet sitting on 6W insulators
Building the most straight forward layout Class A 710


9. Looking good?
Building the most straight forward layout Class A 610

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Building the most straight forward layout Class A Empty Re: Building the most straight forward layout Class A

Post by chchyong89 Fri Oct 16, 2020 12:41 am

10. Finished! The board and transformer mounted underneath of the chassis. 
Building the most straight forward layout Class A 810

11. Stress test in a closed room with 38c room temperature. 
Building the most straight forward layout Class A 910

12. Class A biased at 1.2A and running hot at 114W  Twisted Evil
Building the most straight forward layout Class A 1010

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Post by chchyong89 Sun Oct 18, 2020 8:32 am

Building the most straight forward layout Class A Img_2028
Building the most straight forward layout Class A Img_2029
 
BURNING in~~

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Building the most straight forward layout Class A Empty Re: Building the most straight forward layout Class A

Post by terenceng94 Sun Oct 18, 2020 11:04 pm

Seriously loving it, can i have the first unit  Twisted Evil, feel in love the first time i heard it

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Building the most straight forward layout Class A Empty Re: Building the most straight forward layout Class A

Post by chchyong89 Tue Oct 20, 2020 2:08 am

Some benches for tonight!

Building the most straight forward layout Class A Img_2031

Building the most straight forward layout Class A Img-2010

I/O scopes:
Building the most straight forward layout Class A Inout_11
27dB Gain

chchyong89
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Building the most straight forward layout Class A Empty Re: Building the most straight forward layout Class A

Post by chchyong89 Tue Oct 20, 2020 2:09 am

FFT Measurements:
Building the most straight forward layout Class A 2_harm10
Building the most straight forward layout Class A Invert11

Building the most straight forward layout Class A Invert12
A2540 Characteristics:
THD: ~0.015%
THD+N: ~0.02%
2nd Harmonics dominant

Test:
1khz, 1w@8ohm resistor load.

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Post by chchyong89 Thu Oct 22, 2020 5:17 pm

Mono blocks hehe!

Building the most straight forward layout Class A Img_2034

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Building the most straight forward layout Class A Empty Re: Building the most straight forward layout Class A

Post by WillT Wed Oct 28, 2020 2:29 pm

CCY has done a good job with its first stereo power amp. Here’s a review:

https://www.facebook.com/103763851405247/posts/168252844956347/?d=n

A for-what-it’s-worth sample of the above stereo power amplifier.

https://youtu.be/xFRAoSSsv8g
WillT
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Character sheet
Source(s): Lumin U1 Mini & Matrix Audio X Sabre Pro
Amplification: Silbatone JI-107
Speakers: Graham Audio LS 8/1 and Rogers LS 3/5a Classic ... REL T7x

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Building the most straight forward layout Class A Empty Re: Building the most straight forward layout Class A

Post by chchyong89 Sun Nov 01, 2020 8:53 am

thank you sifu for playing my amp~ 😁

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Building the most straight forward layout Class A Empty Re: Building the most straight forward layout Class A

Post by moppy Thu Oct 21, 2021 3:37 pm

Is this a F6?

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