Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: kagliostro on January 05, 2011, 10:13:07 am

Title: I draw a layout for Butterylicious Mic Pre - Can I have councils and help ?
Post by: kagliostro on January 05, 2011, 10:13:07 am

I've tried to draw a layout of the Butterylicious Octal Mic Pre with 6SL7 & 6SN7



the original thread is this
http://www.el34world.com/Forum/index.php?topic=10116.msg94794#msg94794



Sorry for the neavity of my draw

I need your help to complete the draw, need your councils and revise


My transformers are different from those used in the original project

I've:

an input transformer with a CT in the primary winding (not present in the original)
this one
http://it.rs-online.com/web/search/searchBrowseAction.html?method=browseSubRange&Ne=4294583802&N=4294571284&productNum=2106352

an output transformer with two secondaries, one with CT (not present in the original)
this one
http://docs-europe.origin.electrocomponents.com/webdocs/0d72/0900766b80d72893.pdf

the PT is different and I haven't an LT1084-CT12 (I've tried to use an LM338 as current supply)
so I've some mod to the Power Supply

Also I've many doubts in my mind about all ground connections

Can you help me to complete the Input and Output transformers connections

and revise the layout for errors ?

I revised more times but I'm sure something of wrong is there !

MANY MANY THANKS IN ADVANCE

Kagliostro

p.s.: the .pdf file is more readable than the .jpg because of file limit dimensions

Quote

EDIT I had some problems with the attached files, hope now all is right