ZenV8 with CCS and Capacitance multiplier! - Page 3 - 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 17th February 2006, 10:56 PM   #21
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 apassgear


Thanks Steen, nice words.

Spent some days with my 90 years old good mother in sunny Viña del Mar, wonderful vacations. Also had the chance to see the Queen Marry II sail from port.

Even if all of this is out of topic let me share some pics with all my frinds.

Here, my Mother, my wife Betty and yours truly…after some photo crippling to fit...

hehe-nice to see that your mom looks better than you

spending some time with parents is always more and more valuable ,as years going by..........


now,I just wait to see steen's pics here.........
__________________
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 18th February 2006, 01:33 AM   #22
Account Disabled
 
Join Date: Aug 2002
Location: Near to the Pacific Ocean
You guys . . . too noisy . . . always when I sleep . . .

Why no this way . . . ?

jh
Attached Images
File Type: jpg proposal 1.jpg (18.1 KB, 478 views)
  Reply With Quote
Old 18th February 2006, 01:52 AM   #23
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 jh6you
You guys . . . too noisy . . . always when I sleep . . .

Why no this way . . . ?

jh

hehe
magical eraser
you miss one black spot under the source of Jfet.......

no SRPP
no Mu folower
plain ole cascode

less gain........
more distortion....

I have no doubt that steen will try this too
and let us know what is more pleasent to ear.........
__________________
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 18th February 2006, 03:52 AM   #24
diyAudio Member
 
apassgear's Avatar
 
Join Date: Nov 2002
Location: Viña del Mar, Torreon
Quote:
Originally posted by jh6you
Why no this way . . . ?

Who is driving Q5?

I second Choky...
  Reply With Quote
Old 18th February 2006, 04:19 AM   #25
Account Disabled
 
Join Date: Aug 2002
Location: Near to the Pacific Ocean
Quote:
Originally posted by apassgear


Who is driving Q5?
Hoohoohoohhh . . . steenoe drives it . . .

jh
  Reply With Quote
Old 18th February 2006, 08:52 AM   #26
diyAudio Member
 
Join Date: Jul 2001
Location: The Netherlands
Quote:
Originally posted by choky



Q3's gate is referenced to ground (via 22oUF cap at gate) only when AC (noise,ripple) came in ;in a meantime Q3 just sits there,eating approx. 4 V of PS voltage
diode is there just for protection

at least this is how I understand this

Ah ok, the Drain and Gate are at the same voltage.... Source sits at about 4 volts less ... the 220uF cap averages out the rimmple at the gate ... but what happens if rimmple becomes 1Vpp before the Drain ... the limmited Drain-Source voltage will limmit the effectiveness of this cap-multiplier arangment.. that's just a waste !

I think a voltage-divider (1 resistor to ground), ensuring at least 5 or 5.5 volt drain-source would enhance the performance of this circuit significantly... 1 resistor could make a lot of differnce here man!


I a real BJT cap-multiplier, such a voltage divider isn't nessecary because the base-current will cause a voltage-drop allong the base resistor, providing room for some ripple before smoothing...but with a MOSFET , no gate current, so no voltage drop ..
  Reply With Quote
Old 18th February 2006, 09:07 AM   #27
steenoe is offline steenoe  Denmark
diyAudio Member
 
steenoe's Avatar
 
Join Date: Mar 2004
Guy's, thanks a lot for all the input
Quote:
I think a voltage-divider (1 resistor to ground), ensuring at least 5 or 5.5 volt drain-source would enhance the performance of this circuit significantly... 1 resistor could make a lot of differnce here man!
What value would you suggest for that resistor, Tschrama?
If you look at the circuit (regulator) You will see that it is a copy of the Zen regulator. Only thing missing is the zenerstring from R8 to ground. I also have some big BJT's that I could put in, if that is better.

Steen
  Reply With Quote
Old 18th February 2006, 09:11 AM   #28
steenoe is offline steenoe  Denmark
diyAudio Member
 
steenoe's Avatar
 
Join Date: Mar 2004
Quote:
Here, my Mother, my wife Betty and yours truly…
Lovely picture, Tony We could use some of that weather here in Denmark right now. Its all grey and cold here.

Steen
  Reply With Quote
Old 18th February 2006, 09:35 AM   #29
diyAudio Member
 
Join Date: Jul 2001
Location: The Netherlands
parallel to C3 a 15K resistor... ...
  Reply With Quote
Old 18th February 2006, 09:37 AM   #30
diyAudio Member
 
Join Date: Jul 2001
Location: The Netherlands
and don't worrie about it to much... but it looked like a wasted oppotunity to me that's all .... MOSFET is fine is that position, for BJT you may have to change more values so just leave it the way it is...



... allthough a BTJ would give you 3 or 4 more Volt output......
  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
Improving the capacitance multiplier Mr Evil Power Supplies 19 30th October 2013 04:09 PM
Capacitance Multiplier PSU Ted205 Chip Amps 3 2nd March 2009 01:27 PM
Capacitance Multiplier Kinnja Solid State 2 13th January 2008 08:12 PM
Capacitance Multiplier for A5? siouxiebuff Pass Labs 3 21st January 2006 04:27 PM


New To Site? Need Help?

All times are GMT. The time now is 12:42 AM.


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