Jfet BOZ - Page 55 - 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 25th April 2008, 03:42 PM   #541
diyAudio Member
 
Join Date: Jan 2007
Location: Iowa
Your only 20 years ahead of me in the race called life, he he.

""Pacific " preamp"? don't know what that is, care to enlighten or is it one of those things I should use the magical search button for, or that I should know as an "audio guy".

BTW, I get to play a little today since it is the weekend, I will see what all I can do. Parts are running a bit thin, time to hit up Mouser and Digikey again.

Cheers
James
  Reply With Quote
Old 30th April 2008, 02:45 PM   #542
Tolu is offline Tolu  Germany
diyAudio Member
 
Tolu's Avatar
 
Join Date: Mar 2007
I am thinking about using a LithiumPolymer-Accu as PS for the JFET BOZ. The values are 18.5V or 22.1V and 2.2 Ah. What do I have to put between the accu and the BOZ. Only a voltage regulator or some caps too?

How long will the JFET BOZ play with two 9V blocks?
  Reply With Quote
Old 30th April 2008, 02:54 PM   #543
DaveM is offline DaveM  United States
diyAudio Member
 
DaveM's Avatar
 
Join Date: Feb 2003
Location: Vermont
I am using standard alkaline cells. I have gone through several sets of batteries because I have forgotten to turn it off. 4 year old grabs your hand and drags you out of the room. You come back in 2 days later to listen no pre-amp. With that, my first set lasted a couple months before I stated to notice increased distortion at volume.
  Reply With Quote
Old 30th April 2008, 04:22 PM   #544
diyAudio Member
 
jacco vermeulen's Avatar
 
Join Date: Oct 2004
Location: At the sea front, Rotterdam or Curaçao
Send a message via Yahoo to jacco vermeulen
Quote:
Originally posted by JPeitzman
Pacific preamp?
Le Pacific is a JFET/BJT/Tube hybrid, google for bonavolta.ch

(Zenski is younger than me AND a relic, there's hope for me yet)
__________________
The buck stops Here
  Reply With Quote
Old 30th April 2008, 06:57 PM   #545
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 jacco vermeulen


Le Pacific is a JFET/BJT/Tube hybrid, google for bonavolta.ch

(Zenski is younger than me AND a relic, there's hope for me yet)

Attached Files
File Type: txt pacific fet preamp.txt (3.4 KB, 283 views)
__________________
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 30th April 2008, 06:58 PM   #546
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 jacco vermeulen


Le Pacific is a JFET/BJT/Tube hybrid, google for bonavolta.ch

(Zenski is younger than me AND a relic, there's hope for me yet)

Attached Images
File Type: jpg pacificriaapre.jpg (40.3 KB, 1481 views)
__________________
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 30th April 2008, 08:20 PM   #547
diyAudio Member
 
jacco vermeulen's Avatar
 
Join Date: Oct 2004
Location: At the sea front, Rotterdam or Curaçao
Send a message via Yahoo to jacco vermeulen
Oops again, me confuse with the Hiraga Pacific, beat me with a frozen leg of lamb.

(btw, you'd like Mr. Walther, piccy of the gentleman here )
__________________
The buck stops Here
  Reply With Quote
Old 30th April 2008, 08:28 PM   #548
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 jacco vermeulen
Oops again, me confuse with the Hiraga Pacific.

(btw, you'd like Mr. Walther)

btw - there is one for ya , bloody millionlinguaboy :

( )


http://ndaviden.club.fr/index.html

looki lookie for L'Audiophile scan cds ;

40 heuristick greenies will give ya ultimate virtual pleasure .........

I'm sorta shilly shally ....... frenchie isn't even my last Engrish .......
__________________
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 2nd May 2008, 02:44 PM   #549
diyAudio Member
 
Join Date: Jan 2007
Location: Iowa
Hmm... something else simple I may have to build up. It bears a passing resemblance to the JBOZ. I am about an hour and a half from home and will be for the next few days so I can't tinker at all Though I ordered some parts for the JBOZ and it's power supply that, with a little luck, will be on my door when I get home. It's coming along with some parts for a 300B monoblock build that is my long-running summer project. That is if I don't get side tracked with something like a Aleph-J or JFET buffered Zen V.4. Thanks a lot Master Pass, with this simple circuit you have gotten me hopelessly addicted to JFET's! I never knew a JFET in a simple circuit like the JBOZ could sound so amazing. I might have to give it a try but I have a feeling that a single BJT will not sound as good. Of course it could be that little bit of Zen magic that makes it's way into every Pass design, turning the ordinary into something very very special. At least my JFET addiction will be a little bit cheaper to feed compared to my tube addiction.

BTW I have a small stock of old 2N4220 JFET's that I might give a try in this amp, any thoughts. They are in little TO-72 cases with a fourth pin to ground the case. My dad used them in the industrial work that he did, they where for very sensitive low-level signal inputs. I guess I will just pop them in and fire them up, test it the old and fun way.

Cheers
James
  Reply With Quote
Old 8th May 2008, 07:45 AM   #550
Tolu is offline Tolu  Germany
diyAudio Member
 
Tolu's Avatar
 
Join Date: Mar 2007
Hi

I want to build an output stage for the Playstation 1 with the JFET BOZ. Therefore I need only 9 to 12 dB gain. How can I achieve this? What parts do I have to change?
  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
JFet BOZ Tyimo Pass Labs 14 30th April 2006 03:18 PM
Can I replace BF245C JFET with J201 JFET? bigmike216 Parts 2 7th December 2005 06:50 AM
How to use Jfet? lumanauw Pass Labs 5 7th April 2005 03:12 AM


New To Site? Need Help?

All times are GMT. The time now is 10:38 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