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 View Post: DIY Workshop » New Cavalli Kumisa III plus Boards
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runeight


Headphone Council

Joined: Mar. 8, 2002
Locale: Austin, Texas
Total Posts: 1879

posted 11-03-2006 01:47 AM CST (US)   View Profile for runeight   Send PM  to runeight   |  Edit Message  |  Quote Message in Reply
Changes

The latest amp schematics are in post #92
The latest PCB is in post #158

Group buy has ended

For information on obtaining CK2III boards please go to AMB's Website

Photos of the final group buy board: #185

Thanks to amb for making these boards available.

Introduction

Several of you have written to me over the last month asking if I would return to headwize. I would like to thank all of you for your email and messages. Since I am a fan of this forum and appreciate what cmoy does to make it possible, I am going to take this opportunity to introduce the new Cavalli Kumisa III amplifier.

Much of this work was done by awpagan, DaveM, dbel84, and me on another thread. Dbel84 and I finished the work offline. I designed a PCB for the new amp and dbel84 did a prototype on a homemade, two-sided board. I will let him post with pictures and comments on the amp's audio.

AMB (www.amb.org), who has contributed to this forum in so many ways and who supplies boards and support for a number other amps, has agreed to supply and support the new CKIII boards. He has taken our original design and, with a few mods, translated it to Eagle format. He will post images and board availability information in a follow up post.

I have simulated this amp extensively and believe that it will rival or better most, maybe all, other amps in its class. It uses an all discrete design and should be relatively inexpensive to build.

The board has both channels and an integrated power supply section on a single board. It will need a transformer, volume control, jacks, enclosure, etc. to complete it.

Schematics are attached.

If you buy boards from amb I will support any questions/problems through this forum as best I can with the time that I have. <cool>

Edit: There was an error in the drawing of the servo. Schematic has been replaced.

[Edited by runeight on 01-05-2007 at 08:46 PM.]


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