6DJ8 tube schematic as balanced line stage?

gaborbela · 18th March 2010, 09:13 AM

6DJ8 (balanced) tube line stage

Hello
These line stage can be used as a balanced line stage to drive amplifier like Aleph X etc ..
Any idea ,advise welcome .

Thanks
Greets gabor

Gordy · 18th March 2010, 09:26 AM

In theory you can use the illustrated left / right channels as hot / cold phase of a balanced line stage. However in practice the two channels / phases in this design do not cross-reference to each other, and therefore are not always going to be 100% balanced.

Probably best to leave this as an unbalanced line stage, and look for other solutions.

Consider transformers as a good way to achieve balance, and also have a read of some of the articles here: John Broskie's Guide to Tube Circuit Analysis & Design (such as Balanced Aikido and http://www.tubecad.com/june99/page7.html)

Also consider buying TubeCAD software (not so expensive) to help you with design of a balanced stage.

Regards, G.

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18th March 2010, 09:26 AM	#2
Gordy diyAudio Member Join Date: Nov 2006	In theory you can use the illustrated left / right channels as hot / cold phase of a balanced line stage. However in practice the two channels / phases in this design do not cross-reference to each other, and therefore are not always going to be 100% balanced. Probably best to leave this as an unbalanced line stage, and look for other solutions. Consider transformers as a good way to achieve balance, and also have a read of some of the articles here: John Broskie's Guide to Tube Circuit Analysis & Design (such as Balanced Aikido and http://www.tubecad.com/june99/page7.html) Also consider buying TubeCAD software (not so expensive) to help you with design of a balanced stage. Regards, G.

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