Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Pass Labs This forum is dedicated to Pass Labs discussion.

Aleph J illustrated build guide
Aleph J illustrated build guide
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 15th May 2019, 01:04 PM   #3631
stefanoallavoro is offline stefanoallavoro
diyAudio Member
 
Join Date: Jul 2017
Nice answer...but seriously? Where? after the first resistors r1, r3 with a T circuit?
  Reply With Quote
Old 15th May 2019, 02:45 PM   #3632
Mazeppa is offline Mazeppa  United States
diyAudio Member
 
Mazeppa's Avatar
 
Join Date: Mar 2009
Location: Harrison, Arkansas
Aleph J illustrated build guide
Quote:
Originally Posted by Mazeppa View Post
Goofball audio electronics wizard with a heart of gold, you are.
So long as I'm at it; 6L6 and MJ to name 2 of a few should be recognized (maybe sans the goofball appellation, though they both have their moments)
as well.
This community in general has really good folks in it.
As has been said in Arkansas at such times; "Y'all are awright by me."
__________________
CD transport<Schiit Gungnir Multibit DAC<Schiit Saga Pre<ACA's in mono parallel<Tekton Lore Reference or Omega Super 3XRS
  Reply With Quote
Old 15th May 2019, 04:12 PM   #3633
RafaPolit is offline RafaPolit  Ecuador
diyAudio Member
 
RafaPolit's Avatar
 
Join Date: Dec 2016
Location: Quito, Ecuador
Quote:
Originally Posted by stefanoallavoro View Post
Nice answer...but seriously? Where? after the first resistors r1, r3 with a T circuit?
I don't think its that easy, is it? That's why there are Buffers and Preamps that do this but keeping impedances in the 'correct' realm.

A power amp just does it's thing, no volume control. Perhaps for testing purposes, but not for a final solution.

I know nothing about this though. Maybe it is as easy.
  Reply With Quote
Old 15th May 2019, 04:52 PM   #3634
6L6 is offline 6L6  United States
diyAudio Moderator
 
6L6's Avatar
 
Join Date: Oct 2010
Location: Denver, Colorado
Aleph J illustrated build guide
Yes, it is that easy.

Potentiometer is placed in front of amplifier input, amplifier input now takes signal from potentiometer wiper.

Potentiometer is nothing more than a voltage divider.

Last edited by 6L6; 15th May 2019 at 05:12 PM.
  Reply With Quote
Old 15th May 2019, 05:19 PM   #3635
Itsmee is offline Itsmee  England
diyAudio Member
 
Itsmee's Avatar
 
Join Date: Feb 2009
Aleph J illustrated build guide
Quote:
Originally Posted by 6L6 View Post
Yes, it is that easy. ...
Attached Images
File Type: jpg Input pot.jpg (19.1 KB, 183 views)
  Reply With Quote
Old 15th May 2019, 06:22 PM   #3636
stefanoallavoro is offline stefanoallavoro
diyAudio Member
 
Join Date: Jul 2017
Thanks Itsmee for the answer..but the problem is that the amplifier has an balanced input...so I suppose I cannot reduce the voltage of the + line only...
  Reply With Quote
Old 15th May 2019, 07:04 PM   #3637
Mark Johnson is offline Mark Johnson  United States
diyAudio Member
 
Mark Johnson's Avatar
 
Join Date: May 2011
Location: Silicon Valley
Same answer still applies.


Big question...how and where insert a potentiometer for volume control. Thanks for the answers


In front. After dealing with the surprise unstated detail that the amp has balanced inputs, you can deal with the surprise unstated detail that the potentiometer has 4 gangs. Two for the left channel (+ side and - side), two more for the right channel (+ side and - side).


Here is one example


9mm ALPS A50K 50K Audio Taper Potentiometer 15mm Knurled Shaft 4 Gang-in Potentiometers from Electronic Components & Supplies on Aliexpress.com | Alibaba Group
  Reply With Quote
Old 15th May 2019, 10:43 PM   #3638
stefanoallavoro is offline stefanoallavoro
diyAudio Member
 
Join Date: Jul 2017
thanks Mark..I'll try and refer my trial on the chat
  Reply With Quote
Old 20th May 2019, 03:01 AM   #3639
aljordan is offline aljordan  United States
diyAudio Member
 
Join Date: May 2006
I am thinking about monoblocks and saving money on chassis and power supplies. Would someone tell me if the following would not work, or otherwise be a bad idea? I am a liberal arts guy, not an engineer, so please be gentle.

I have an Aleph J and an M2, each in a Deluxe 4U DIY Audio Store chassis, and both with very similar power supplies (maybe the brand of capacitors are different). If I wanted to convert them to monoblocks without buying extra chassis and power supplies, could I set up the two chassis so that each has an M2 board and an Aleph J board, then install a heavy duty 3PDT toggle switch so that the power supply would only power one board at any given time?

Thanks
  Reply With Quote
Old 20th May 2019, 03:27 AM   #3640
Mazeppa is offline Mazeppa  United States
diyAudio Member
 
Mazeppa's Avatar
 
Join Date: Mar 2009
Location: Harrison, Arkansas
Aleph J illustrated build guide
Quote:
Originally Posted by aljordan View Post
I am thinking about monoblocks and saving money on chassis and power supplies. Would someone tell me if the following would not work, or otherwise be a bad idea? I am a liberal arts guy, not an engineer, so please be gentle.

I have an Aleph J and an M2, each in a Deluxe 4U DIY Audio Store chassis, and both with very similar power supplies (maybe the brand of capacitors are different). If I wanted to convert them to monoblocks without buying extra chassis and power supplies, could I set up the two chassis so that each has an M2 board and an Aleph J board, then install a heavy duty 3PDT toggle switch so that the power supply would only power one board at any given time?

Thanks
Long ways from an audio electronics guru myself, but that sounds like a capital idea to me.
Have you got room on the back panel for the additional input and output connectors?
__________________
CD transport<Schiit Gungnir Multibit DAC<Schiit Saga Pre<ACA's in mono parallel<Tekton Lore Reference or Omega Super 3XRS
  Reply With Quote

Reply


Aleph J illustrated build guideHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
An illustrated guide to building an F5 6L6 Pass Labs 1185 4th April 2019 03:42 AM
MyRefC build guide AndrewT Chip Amps 1119 29th July 2016 10:30 PM
An illustrated guide for Aleph 60 builders PKI Pass Labs 58 12th October 2013 07:13 PM
Aleph J Stuffing guide ? thor61 Pass Labs 2 4th September 2011 08:02 PM
My first step by step LM3886 illustrated build kgb_m3 Chip Amps 19 17th February 2010 04:46 PM


New To Site? Need Help?

All times are GMT. The time now is 10:59 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio
Wiki