New Current Feedback Amp. - Page 2 - 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 19th January 2002, 01:38 PM   #11
sonnya is offline sonnya  Denmark
diyAudio Member
 
sonnya's Avatar
 
Join Date: Oct 2001
Location: Denmark
mmmhh i will mail you ...

I can't remember in wich thread the Alexander was discussed!? Try search in the solid state forum... There was something about the sound of it ...

KM madsen did have something to say about it.

Sonny
  Reply With Quote
Old 19th January 2002, 02:57 PM   #12
tvi is offline tvi  Australia
diyAudio Member
 
tvi's Avatar
 
Join Date: Apr 2001
Location: Moonee Ponds, Vic, Australia
<a href="http://www.diymania.net/pass/project/CF-Power.htm">Current Feedback Power Amplifier</a> Korean page, in English, lots of links to application notes


James
  Reply With Quote
Old 19th January 2002, 03:19 PM   #13
sonnya is offline sonnya  Denmark
diyAudio Member
 
sonnya's Avatar
 
Join Date: Oct 2001
Location: Denmark
Whoaaa!! That was close to my first design!!

Sonny
  Reply With Quote
Old 19th January 2002, 07:12 PM   #14
jazz is offline jazz  Netherlands
diyAudio Member
 
Join Date: Dec 2001
Location: leiden, physically that is...
Default pitfall

Hi there,

I have build both Hiraga designs as shown on Geof's page and those are to my knowledge current feedback designs. Both sound very good to me but i will not comment on quality in relation to other designs. I have found one pitfal though and that concerns a bandwith limitation cap in the feedback path. I've build the Hiraga 20 w several times and in several forms using the various schematics available on the net. Some of these have no bandwith limitation and some do. This led me to experiment and for now i have to conclude that quality of the cap in the feedback path is very influential. One schematic of the hiraga 20 watt is shown on the bonavolta site and shows a 2200 pF cap in the feedback path. Experiments (by ear) leeds me to conclude that other ways of bandwith limitation seem to be better for this sort of design. A standard Cdom cap was much less intrusive for example. Thus i think that if you want to use current feedback you should keep it away from bandwith limiting arrangements.

greetings Joris Z.
__________________
oh, what a beautifull day
I wanna go out and play!
  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



New To Site? Need Help?

All times are GMT. The time now is 05:40 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