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Building the most straight forward layout Class A

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

Post by chchyong89 on 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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Post by chchyong89 on 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

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Post by chchyong89 on 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

chchyong89
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Post by chchyong89 on 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 on 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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Post by terenceng94 on 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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Post by chchyong89 on 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

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

Mono blocks hehe!

Building the most straight forward layout Class A  Img_2034

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Post by WillT on 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
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Character sheet
Source(s): Mytek Brooklyn Bridge
Amplification: Silbatone JL-107 & Audia Flight FLS10
Speakers: AudioSolutions Figaro M & Harbeth P3ESR ... Rythmik F12 sub

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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 on Sun Nov 01, 2020 8:53 am

thank you sifu for playing my amp~ 😁

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