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/

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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

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