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 10th June 2008, 12:43 AM   #521
Paper mache horn fabricator
diyAudio Member
 
carpenter's Avatar
 
Join Date: Mar 2002
Location: Oregon City, Oregon
I made the correction on my latest schematic layout. Cool, it raised the sine-wave upwards on the volt scale--should allow for a bit more input voltage without clipping the lower half of the sine-wave.

It's difficult for me to locate a large dual five volt supply, so I'm toying with a ten volt power supply with the additon of a virtual ground. I hope that someone will be kind enough to explain whether or not my attempt has merit.

Many thanks, guys.

John
Attached Images
File Type: png jfet zv7-t 4.png (43.7 KB, 141 views)
__________________
I enjoy audio so much that I constructed a web site. I share my ideas at: www.inlowsound.com
  Reply With Quote
Old 10th June 2008, 04:19 AM   #522
Paper mache horn fabricator
diyAudio Member
 
carpenter's Avatar
 
Join Date: Mar 2002
Location: Oregon City, Oregon
So, I made a few more changes:
Attached Images
File Type: png sinewave.png (37.6 KB, 121 views)
__________________
I enjoy audio so much that I constructed a web site. I share my ideas at: www.inlowsound.com
  Reply With Quote
Old 10th June 2008, 04:21 AM   #523
Paper mache horn fabricator
diyAudio Member
 
carpenter's Avatar
 
Join Date: Mar 2002
Location: Oregon City, Oregon
The sim says it's only a two watt affair, but that's what I want. Here's another graph:
Attached Images
File Type: png lu1014d transistor id-vds chart 6-9-08.png (85.8 KB, 116 views)
__________________
I enjoy audio so much that I constructed a web site. I share my ideas at: www.inlowsound.com
  Reply With Quote
Old 11th June 2008, 05:25 AM   #524
Paper mache horn fabricator
diyAudio Member
 
carpenter's Avatar
 
Join Date: Mar 2002
Location: Oregon City, Oregon
Quote:
Originally posted by Zen Mod

even better - use CCS as Papa like it - mosfet + little bjt

Hey Choky, how's this?
Attached Images
File Type: png neoshooter 3.png (40.2 KB, 104 views)
__________________
I enjoy audio so much that I constructed a web site. I share my ideas at: www.inlowsound.com
  Reply With Quote
Old 11th June 2008, 06:46 AM   #525
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
Quote:
Originally posted by carpenter



Hey Choky, how's this?

wrong ;
you are loosing advantages of linearisation when CCS is in tail , complicating with series CCS-es and chokes
__________________
my Papa is smarter than your Nelson !
tnx to clean thread ; Cook Book ; PSM LS Cook Book ; Baby Diyaudio FORUM ; Mighty ZM's Bloggg;I'm dumb
  Reply With Quote
Old 11th June 2008, 01:34 PM   #526
Paper mache horn fabricator
diyAudio Member
 
carpenter's Avatar
 
Join Date: Mar 2002
Location: Oregon City, Oregon
Quote:
Originally posted by Zen Mod



wrong ;
you are loosing advantages of linearisation when CCS is in tail , complicating with series CCS-es and chokes

back to the drawing board for me........

Thanks, Choky!
__________________
I enjoy audio so much that I constructed a web site. I share my ideas at: www.inlowsound.com
  Reply With Quote
Old 11th June 2008, 01:51 PM   #527
Paper mache horn fabricator
diyAudio Member
 
carpenter's Avatar
 
Join Date: Mar 2002
Location: Oregon City, Oregon
This seems to work, and if a bit more efficient:
Attached Images
File Type: png neoshooter 3.png (39.4 KB, 216 views)
__________________
I enjoy audio so much that I constructed a web site. I share my ideas at: www.inlowsound.com
  Reply With Quote
Old 11th June 2008, 02:43 PM   #528
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
Quote:
Originally posted by carpenter
This seems to work, and if a bit more efficient:

finding 6V xformers ( even SMPS ) isn't so hard , so it's easy to make +/- 6V PSU;

keep gates on gnd potential , common CCS on - 6 and chokes at +6
__________________
my Papa is smarter than your Nelson !
tnx to clean thread ; Cook Book ; PSM LS Cook Book ; Baby Diyaudio FORUM ; Mighty ZM's Bloggg;I'm dumb
  Reply With Quote
Old 11th June 2008, 10:26 PM   #529
Paper mache horn fabricator
diyAudio Member
 
carpenter's Avatar
 
Join Date: Mar 2002
Location: Oregon City, Oregon
Quote:
Originally posted by Zen Mod



finding 6V xformers ( even SMPS ) isn't so hard , so it's easy to make +/- 6V PSU;

keep gates on gnd potential , common CCS on - 6 and chokes at +6

To be quite honest, I'm trying to play with the parts in my junk drawer. Money's a little bit tight at the moment. I was hoping that my virtual ground idea would save me a couple of bucks. But, if you think that dual transformers are the way to go, I'll put more effort into finding a pair.

John
__________________
I enjoy audio so much that I constructed a web site. I share my ideas at: www.inlowsound.com
  Reply With Quote
Old 11th June 2008, 10:35 PM   #530
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
Quote:
Originally posted by carpenter



To be quite honest, I'm trying to play with the parts in my junk drawer. Money's a little bit tight at the moment. I was hoping that my virtual ground idea would save me a couple of bucks. But, if you think that dual transformers are the way to go, I'll put more effort into finding a pair.

John

make a sim or few with these voltages and observe

then decide ;
nobody is smarter than you , for your wallet
__________________
my Papa is smarter than your Nelson !
tnx to clean thread ; Cook Book ; PSM LS Cook Book ; Baby Diyaudio FORUM ; Mighty ZM's Bloggg;I'm dumb
  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
Using mains transformer as output transformer Elias Tubes / Valves 176 11th March 2013 09:35 PM
Modulation transformer for a driver transformer? ironradio Tubes / Valves 6 28th December 2008 05:05 PM
filament transformer vs plate transformer contaxchen Tubes / Valves 10 14th January 2005 10:43 AM
toroid Transformer as power Transformer for tube tone Tubes / Valves 7 11th February 2003 08:57 AM
toroid Transformer as output Transformer for tube preamp? tone Tubes / Valves 15 2nd February 2003 04:36 AM


New To Site? Need Help?

All times are GMT. The time now is 11:33 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