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.

50w Single-Ended BAF2015 Schade Enabled
50w Single-Ended BAF2015 Schade Enabled
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 23rd May 2016, 08:29 AM   #121
wrenchone is offline wrenchone  United States
diyAudio Member
 
wrenchone's Avatar
 
Join Date: Feb 2004
Location: Silicon Valley
Better out than in...
  Reply With Quote
Old 23rd May 2016, 08:31 AM   #122
2 picoDumbs is offline 2 picoDumbs  Australia
diyAudio Member
 
2 picoDumbs's Avatar
 
Join Date: Sep 2013
That's very true.

Hahahaha
__________________
"If you leave this point unattached to some circuitry, an ideal constant current source will emit a small lightning bolt which will travel until it connects to something." Nelson Pass
  Reply With Quote
Old 23rd May 2016, 12:36 PM   #123
woody is offline woody
diyAudio Member
 
Join Date: Jan 2002
Location: Tyrone Ga. U.S.A.
Has anyone thought about making a circuit board for this or an aleph ccs . I know it can be done point to point but I would prefer a board.
  Reply With Quote
Old 23rd May 2016, 01:11 PM   #124
2 picoDumbs is offline 2 picoDumbs  Australia
diyAudio Member
 
2 picoDumbs's Avatar
 
Join Date: Sep 2013
Quote:
Originally Posted by woody View Post
Has anyone thought about making a circuit board for this or an aleph ccs . I know it can be done point to point but I would prefer a board.
I'm guessing at some point Papa may do a pcb.

I will probably do one at some stage but not until I have tested a prototype of the amp,
I am still saving my money for the capacitors so haven't built it yet
__________________
"If you leave this point unattached to some circuitry, an ideal constant current source will emit a small lightning bolt which will travel until it connects to something." Nelson Pass
  Reply With Quote
Old 23rd May 2016, 02:08 PM   #125
jostwid is offline jostwid  Switzerland
diyAudio Member
 
Join Date: Nov 2009
Location: Geneva
50w Single-Ended BAF2015 Schade Enabled
Quote:
Originally Posted by 2 picoDumbs View Post
I'm guessing at some point Papa may do a pcb.

I will probably do one at some stage but not until I have tested a prototype of the amp,
I am still saving my money for the capacitors so haven't built it yet
Those who have a Hammond 193V in the drawer might try to use them in their power supply.
With modest capacitors a ripple of 1mV is possible.PS60V 3A.gif
  Reply With Quote
Old 23rd May 2016, 02:08 PM   #126
Zen Mod is offline Zen Mod  Serbia
Official Court Jester
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
50w Single-Ended BAF2015 Schade Enabled
in case that I'm not late at least 3 years with my amp schedule , I would squeeze some greenies in this one.......
__________________
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa... by Mighty ZM
  Reply With Quote
Old 23rd May 2016, 07:56 PM   #127
needtubes is offline needtubes  United States
diyAudio Member
 
Join Date: May 2003
It seems this circuit can easily be converted into a DC-coupled version, but does such a circuit retain the desirable properties (e.g. Schade feedback)? Would there be worries about significant DC offset while the amp comes up to temperature? SPICE suggests it should be a solid performer, but it has lied to me before...

I have four IXFH74N20P that I bought a while ago for a project that has not yet got off the ground which might make a nice scaled-down version of this amp. I was thinking 24V rails and a 2A bias, which makes dissipation for each FET just under 50W. Although the parts are TO-247, they sport considerably lower junction-case thermal resistance than the usual IRFP240. Could I get away running them so hard?

If no one sees any obvious problems with the operating point or DC-coupled circuit, I may start the process of acquiring the remaining parts to give it a go...

Last edited by needtubes; 23rd May 2016 at 07:59 PM.
  Reply With Quote
Old 23rd May 2016, 08:37 PM   #128
Zen Mod is offline Zen Mod  Serbia
Official Court Jester
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
50w Single-Ended BAF2015 Schade Enabled
I have IRFP150 , working on 50W each for years
__________________
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa... by Mighty ZM
  Reply With Quote
Old 23rd May 2016, 09:26 PM   #129
grimberg is offline grimberg  United States
diyAudio Member
 
grimberg's Avatar
 
Join Date: Oct 2002
Location: California, USA
Quote:
Originally Posted by Zen Mod View Post
in case that I'm not late at least 3 years with my amp schedule , I would squeeze some greenies in this one.......
Care to share the roster of what has been built and what is planned?
  Reply With Quote
Old 23rd May 2016, 10:07 PM   #130
Zen Mod is offline Zen Mod  Serbia
Official Court Jester
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
50w Single-Ended BAF2015 Schade Enabled
what I didn't made and I owe to make :Babelfish SIT-2 , universal ( SIT,SIC,VFet,Mosfet) SE amp , Papa's Sony amp V1 (geschenk from Generg, and kudos for our late friend who made pcbs) ..... to many of these .....
__________________
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa... by Mighty ZM
  Reply With Quote

Reply


50w Single-Ended BAF2015 Schade EnabledHide 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
Single tube, Single ended, 20W, impossible? dannydanger Tubes / Valves 39 1st June 2017 09:18 PM
Single High power Mosfet for big Single Ended Amp ? Ado Solid State 20 25th February 2016 04:32 AM
Single Ended, Single driver: In-room distortion measurements Gerrit Boers Full Range 4 27th November 2007 09:12 AM
Anyone play with the Zen Single-Stage Single-Ended Class A? Rino odorico Pass Labs 13 29th August 2002 10:01 AM


New To Site? Need Help?

All times are GMT. The time now is 11:54 AM.


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