Burning Amps - diyAudio
Go Back   Home > Forums > Amplifiers > Pass Labs

Pass Labs This forum is dedicated to Pass Labs discussion.

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 20th October 2008, 07:47 PM   #1
The one and only
 
Nelson Pass's Avatar
 
Join Date: Mar 2001
Default Burning Amps

At the Burning Amp Festival yesterday, we gave away a batch of semi-built
DIY amplifiers which featured Chassis, connectors, transformers, caps,
and stuffed output stages. All had connections supporting stereo operation.

Most of them were Mosfets arranged either as complementary parallel
sets or as all N channel sets.

As we gave them away, it was clear that people were going to need some
help.

I mean you, Variac.

So I'm starting this thread to get a couple of designs together that
can be put together easily. I figure that some F4 type follower systems
will be the easiest, although there's no reason that we can't explore other
stuff.

If you got one of these honeys, or if you want to just follow along, watch
this space.

  Reply With Quote
Old 20th October 2008, 08:11 PM   #2
Gyuri is offline Gyuri  Hungary
diyAudio Member
 
Gyuri's Avatar
 
Join Date: Nov 2003
Location: Budapest
Excellent thought!

If only I could have been there.
Yet if I do not understand the whole one too much.
But I could have been between peoples outstanding at least.

Gyuri
__________________
Those who would have deserved the life they are all dead already. "Oh, my dead dears!" - Captain Cat
  Reply With Quote
Old 20th October 2008, 08:36 PM   #3
diyAudio Member
 
FastEddy's Avatar
 
Join Date: Jun 2006
Location: North Californie
Praising your unbelievable generosity for allowing us all at Burning Amp to carry off these bargains, I did have a question about swapping out the included transformer (25+25) in #26 on your list for one of higher voltage (50+50) and higher wattage. My purpose is to use your glamorous chassis for a dual channel, higher wattage line amp using an alternate supplier's amp modules.

BTW to All: If possible find a way to attend next years Burning Amp Fest ... even if the goody pile is small, the presentations will be many and the crowds bigger and more feisty than ever.

(My BS is Physics as well, also from the UC system, but I haven't really found the time to teach .... too busy making money.)
  Reply With Quote
Old 20th October 2008, 10:01 PM   #4
preiter is offline preiter  United States
diyAudio Member
 
preiter's Avatar
 
Join Date: May 2006
Awesome!

I took home one of these and I'll need lots of help for sure. The only amplifier I have ever built is a chipamp kit.

Mine came with complementary bipolar outputs. My first step was going to be to figure out the circuit that's already installed and diagram it, then go looking for a suitable input stage.

I don't need a lot of power, 10 watts would be enough. I definitely want to be biased into Class A and I would like to have balanced inputs.
  Reply With Quote
Old 20th October 2008, 10:12 PM   #5
diyAudio Member
 
Join Date: Feb 2001
Location: Columbia, SC
I gather these were just output stages needing front ends?

Grey
  Reply With Quote
Old 20th October 2008, 10:34 PM   #6
Vix is offline Vix  Yugoslavia
diyAudio Member
 
Vix's Avatar
 
Join Date: Nov 2003
Location: Somewhere on Planet Earth
I don't want to suggest a retrograde step, but it seems that there are enough components for the SoZ!

Now don't say it was not a good amp...
  Reply With Quote
Old 21st October 2008, 12:46 AM   #7
berndt is offline berndt  United States
diyAudio Member
 
Join Date: May 2006
Location: south san francisco
I've got #28 and #35
One says bipolar and one says mosfet.
Iv'e been running tubes for a while and look forward to a solid state project.
Thanks again, Bill Berndt
  Reply With Quote
Old 21st October 2008, 12:52 AM   #8
The one and only
 
Nelson Pass's Avatar
 
Join Date: Mar 2001
You will want the Mosfets. You can replace them after you decide
whether you want to go complementary or all N channel.
  Reply With Quote
Old 21st October 2008, 01:48 AM   #9
diyAudio Member
 
FastEddy's Avatar
 
Join Date: Jun 2006
Location: North Californie
We should not impose on Nelson to too great an extent ... probably could use this link (diyAudio Forums > Top >Amplifiers >Pass Labs >Burning Amps) as our touch stone for tech support, parts swaps, glad handing, etc. etc ...

So, anyone want to swap transformers? I have a UPS account ... I will be sweetening any deal with the MOSFETs and boards from my box ...
  Reply With Quote
Old 21st October 2008, 02:47 AM   #10
diyAudio Member
 
Wavebourn's Avatar
 
Join Date: Sep 2006
Location: Pleasant Hill, CA
Send a message via Skype™ to Wavebourn
Some MOSFETs....

Click the image to open in full size.
__________________
The Devil is not so terrible as his math model is!
  Reply With Quote

Reply


Hide 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
The Burning Amp Festival-Burning Gadgets Preview Zen Mod Everything Else 115 27th October 2007 06:50 PM


New To Site? Need Help?

All times are GMT. The time now is 06:25 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2