diyAudio

diyAudio (https://www.diyaudio.com/forums/index.php)
-   Pass Labs (https://www.diyaudio.com/forums/pass-labs/)
-   -   Amp Camp Amp - ACA (https://www.diyaudio.com/forums/pass-labs/215392-amp-camp-amp-aca.html)

flg 30th June 2012 07:55 AM

Amp Camp Amp - ACA
 
:Popworm: Looky Here... Original article by Nelson Pass:
Amp Camp Amp #1
:D
__________________________________________________ ____

Info for Amp Camp Kit (updated by Moderators)

Here's the ORIGINAL step by step photo build guide: ACA illustrated build guide

A new Build Guide for the V1.6 Two channel Chassis in the diyAudio Store.
Amp Camp Amp V1.6 Build Guide - diyAudio Guides

The small changes of the 1.8 version.All ACA’s that have 2 channels in one chassis can be converted to Version 1.8 which only requires buying a different rear panel switch and some re-wiring of the rear panel. Amp Camp Amp V1.8 Change Information - diyAudio Guides


The link below is to a Step by step build video by Patrick Norton on his TekThing website. He makes an error in cutting out the thermal insulator and leaving the backing on. Thebacking just peels off, no cutting required:
February 2016 Patreon Build Video: Amp Camp Amp Dual Monoblocks! - YouTube

See post #1453 for a tweak to the original V1.0 circuit boards. It’s not essential but should improve the sound. This tweak has been incorporated in subsequent versions (1b & 1.5, 1.6,1.8). if you have those circuit boards or kits it's already added to the board, and the part (R15) included in the kits

An ACA thread with lots of great ideas which may or may not improve the amp to your desires:
ACA amp with premium parts

Here’s a thread discussing the kits from the DiyAudio store for V1.6 and V1.8
Amp Camp Amp Kit 1.6/1.8

And here’s the link to the kits:
https://diyaudiostore.com/collection...=7072933085218

Ipanema 30th June 2012 04:02 PM

I try to understand this circuit. Any difference if output taken direct from source of Q2 instead of through R1//R2?

Melon Head 1st July 2012 01:18 AM

Looks like I have another toy to play with. Thanks Nelson
Even greater thanks for designing the PCB.
I don't have time for point to point wiring anymore.

Melon Head 1st July 2012 02:02 AM

Is it ok to replace Q1 with IRFP9240 and run as source follower?

Melon Head 1st July 2012 02:04 AM

1 Attachment(s)
Quote:

Originally Posted by Melon Head (https://www.diyaudio.com/forums/pass-labs/215392-amp-camp-amp-aca-post3077724.html#post3077724)
Is it ok to replace Q1 with IRFP9240 and run as source follower?

The other option is run more feedback in the final amp. I'd rather have less gain or no gain.

flg 1st July 2012 03:04 AM

I'm lookin at this thing thinkin... If you change out Q1 with a Semisouth part... :D

Melon Head 1st July 2012 03:14 AM

Quote:

Originally Posted by flg (https://www.diyaudio.com/forums/pass-labs/215392-amp-camp-amp-aca-post3077767.html#post3077767)
I'm lookin at this thing thinkin... If you change out Q1 with a Semisouth part... :D

Yes that is for certain.
Now that I have some high effiiciency speakers, I think I will be buying 10 of these PCB's and set them up with different components, operating points etc, just for fun and to see what the audible difference might be.

flg 1st July 2012 09:17 AM

Or, maybe a SIT part in place of Q1?

geraldfryjr 1st July 2012 12:27 PM

I like this topology.

Here are a few similar designs that I have come up with a while back, although all of them shown but one uses an opamp for the input stage,

http://www.diyaudio.com/forums/headp...ml#post2596223

I have many versions like this ranging from low voltage to high voltage designs using both opamps and BJT's for the input stages.

Enjoy !!!

:cheers:

jer :)

Antoinel 1st July 2012 12:27 PM

The feedback of the DIYers at Amp Camp #1 will be valuable to read.


All times are GMT. The time now is 04:34 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Copyright ©1999-2021 diyAudio

Wiki