Quad 405: Bernd Ludwig's new Mod text

stefaan · 15th February 2007, 08:32 AM

There is a new, updated version of Bernd's Quad 405 upgrade - revision - tweak text.

You can find the complete text with illustrations on my Quad-weblog (scroll all the way down, it is the last post - or use the hyperlink).

Stefaan

http://quadrevisionspot.blogspot.com/

alex mm · 24th February 2007, 11:15 PM

hi , Stefaan
many years ago, i have build ,the original schematic , supplied with only +/-24Vdc and it work fine

.In 1984 I start ,a new project ,this time whith rail voltage -/+50Vdc in final stage with 2 pairs powers transistors RCA from PERTEK tape recorders .Great project , with no necesary to mach finals transistors , no bias adjust etc ...

Ifind a new born schematic of QUAD 405 developed by T.VICOL and I intend to make it in stereo , please comment the attached schematic .http://i18.tinypic.com/47lwvhf.png

sorry for my poor english

15th February 2007, 08:32 AM	#1
stefaan diyAudio Member Join Date: Mar 2006 Location: Antwerpen	Quad 405: Bernd Ludwig's new Mod text There is a new, updated version of Bernd's Quad 405 upgrade - revision - tweak text. You can find the complete text with illustrations on my Quad-weblog (scroll all the way down, it is the last post - or use the hyperlink). Stefaan http://quadrevisionspot.blogspot.com/ __________________ http://quadrevisionspot.blogspot.com/

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
PCB for Bernd Ludwig's modified Quad 405 circuit	peterfelgate	Solid State	0	22nd May 2009 01:05 PM
An interesting text about Dac and upsampling	gaetan8888	Digital Source	1	28th October 2007 12:31 PM
Eagle: Inverted Text?	Devil_H@ck	Everything Else	2	27th August 2004 01:22 AM
CD-Text information where in subcode?	capslock	Digital Source	7	13th April 2004 09:15 AM

New To Site?	Need Help?
Register to Participate Search Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


<a rel='nofollow' href='http://www.diyaudio.com/openx/www/delivery/ck.php?n=aa5cb2e9&cb=636356' target='_blank'><img src='http://www.diyaudio.com/openx/www/delivery/avw.php?zoneid=3&cb=636356&n=aa5cb2e9' border='0' alt='' /></a>	We're saving for a new server - help us to serve you by Donating Today and become a friend with benefits! Ads on/off / Custom Title / 2009 Tshirt / More PMs / Bigger Images / Advanced printing

24th February 2007, 11:15 PM	#2
alex mm diyAudio Member Join Date: Mar 2006 Location: ROMANIA	hi , Stefaan many years ago, i have build ,the original schematic , supplied with only +/-24Vdc and it work fine .In 1984 I start ,a new project ,this time whith rail voltage -/+50Vdc in final stage with 2 pairs powers transistors RCA from PERTEK tape recorders .Great project , with no necesary to mach finals transistors , no bias adjust etc ... Ifind a new born schematic of QUAD 405 developed by T.VICOL and I intend to make it in stereo , please comment the attached schematic .http://i18.tinypic.com/47lwvhf.png sorry for my poor english

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)