Crown Pulse 650 modified - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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 July 2012, 11:00 AM   #1
diyAudio Member
 
Join Date: Nov 2009
Location: Arges,Cutea De Arges
Default Crown Pulse 650 modified

I v made an amplifier based on the schematic of crown pulse worked prety well,then i decided to have a little fun with the schematic in multisim and the result is the schematic below it works prety well both in reality and in multisim.I want some opinions about the schematic I made, is it room for better or its good the way it is.In the schematic i used bf622-623 in the hom build one bf423 422.Iv made a simetric power amp of crown pulse but that i don think i can post it.
I
Attached Images
File Type: jpg schema amplificator.jpg (183.1 KB, 107 views)
  Reply With Quote
Old 25th July 2012, 11:09 AM   #2
diyAudio Member
 
Join Date: Nov 2009
Location: Arges,Cutea De Arges
A teaser of the crown based simetric power amp.
Attached Images
File Type: jpg Crown symetric.jpg (118.2 KB, 99 views)
  Reply With Quote
Old 25th July 2012, 11:18 AM   #3
diyAudio Member
 
Join Date: Nov 2009
Location: Arges,Cutea De Arges
Onether pic of the sym amp im sory but i realy can not post it.
Attached Images
File Type: png CrownSym-2.png (113.7 KB, 83 views)
  Reply With Quote
Old 19th August 2012, 03:29 PM   #4
diyAudio Member
 
Join Date: Jan 2011
this a fairly common topology I have come across it many times basically the Hitachi application circuit that was originally published with the application notes for the then new MOSFET devices 2SK/2SJ pairs back in the 80's which they also used in their HMA range of PA's.
I have seen it in the Goldmunn "clone" discussed elsewhere on here but this variant was taken from a design for the MST-Rauch DVT PA's from the late 80's with some refinements of Constant current sources added as well as the extra drive pair driving 2SK176/2SJ56 output devices the additions in this are the "rubber diode" or "amplified diode" in the output bias arrangement. I once discussed the behaviour of this topology with Bob Carver when he was still with Carver Professional whilst assesing the product for a client who was considering it for a distribution deal.
a great deal of change the the "subjective audio" can be achieved by altering the "TFM" which he did much research in at some point. I always notice that this class A drve circuit is always operated at a fairly low Iq which does little to make it sound as good as it could or should. my variation on this same topology runs at a much higher Iq with the devices running a lot hotter as true ckass A should IMO the biggest mistake made by all the numerous makers of "MOSFET" PA's was to not have enough current to drive the gates of these output stages in the belief that they did not need or require it completely negating the the stages capacitance that does indeed require it to perform well hence the addition of the extra pair of drivers running directly coupled to the power rails to make sure current was available to the gates this makes for a very "fast" amplifier although particular attention had to be paid to stability issues but it is a good circuit just needs the TFM issues addressed and it will be excellent
  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
cd 650 puzzle guido Digital Source 13 4th May 2015 08:33 AM
Kicker 650.4 in protect torisspacedog Car Audio 13 4th May 2012 07:58 PM
Directed 650 mike49504 Car Audio 6 15th September 2010 06:04 PM
Philips CD 650 NonOS TDA1541 Double Crown Fabian Swap Meet 0 16th December 2008 05:18 PM
Cdb-650 kharp Digital Source 1 2nd August 2006 08:38 AM


New To Site? Need Help?

All times are GMT. The time now is 11:27 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd.
Copyright 1999-2015 diyAudio

Content Relevant URLs by vBSEO 3.3.2