|
KiCADKicad
|
|
|
LT Spice |
Q17.3 - more than an audiophile approach
Q17.3 - more than an audiophile approach to perfect sound
Q17.3 is a continuation of the Q17 class B amplifier based on current dumping principle.
Project source is available at https://github.com/tiberiuvicol/Q17.3
Use KiCad 7, or later, to open and edit source files. KiCad 7 can be downloaded from CERN, https://www.kicad.org
LTSpice - contain simulation asc file
Click & Order your Q17.3 parts @ digikey https://www.digikey.ro/ro/mylists/list/O9YXGXU6LF
For STEREO or MULTICHANNEL multiply the order with the same parts.
What is new ?
Operational was changed to OPA828. This is one of the few SiGe devices on the market, with terrific performance and most important, sound quality is exceptional. Current mirror was replaced with NDC7003P or PJS6839. This have 2 matched p-mos transistors on same substrate with same thermal Vgs deviation.
Furthermore, by adding Q7, current mirror was upgraded to a Wilson one. This improve mirror stability and class A stage operation at high frequncy. In an atempt to make the amplifier more "popular", I have adopted well known parts as 2N4401/2N4403 and 2N5551/2N5401. These are widely available from various manufacturers. First stage after OPA828 is now a modified Borbely cascode, made with a well known jfet LSK170B and a depletion mosfet DN2535/DN2540. In addition, R10 and R13 have been reduced to 9R1.
With this modifications, Q17 performence was considerably improved, both in measurement and listening.
Enjoy !
Q17.3 - more than an audiophile approach
*PCBWay community is a shared platform and we are not responsible for any design issues.
- Comments(0)
- Likes(0)
- 0 USER VOTES
- YOUR VOTE 0.00 0.00
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
More by Endra A
-
Open Source Very Large Stick - Freejoy & MMjoy2 breakout board
488 0 0 -
RF Control training board for students based on ESP32 C3
652 0 2 -
Aquarius+ Computer, Standard PCB
863 0 4 -
KINETIC COASTERS with a TWIST! Laser or 3D Print some DIY Magic
595 0 1 -
RPI - 8 IO PLC With ATTiny85 Watch Dog
519 0 1 -
Nintendo Famicom HVC-001 Controller Shells
618 0 1 -
COMMODORE 128 DIAGNOSTIC REV.785260 KEYBOARD DONGLE
574 0 4 -
COMMODORE 128 15KHz DISPLAY ADAPTER (C128 80 COLUMN ADAPTER)
780 1 5 -