6j5 trasformer coupled driver/splitter

Maurizio · 8th December 2006, 08:02 PM

Hi All..

I want realize a push pull drived by a 6j5 ...transformer coupled..

How to choose the best primary impedance?

The secondary will drive directly the grids of the 6v6..

I'm in trouble how to calculate the impedance on primary.

Can anyone help me?

Thanks,

MAurizio

AndreasS · 8th December 2006, 08:30 PM

Important is the primary inductance in relation to plate resistance of the tube (for the bass rollof), I calculate >10 Henrys for 1 kOhm of plate resistance (for the 6J5 more than 70 Henrys).

Regards Andreas

Maurizio · 9th December 2006, 08:42 PM

HI,

Thanks for your help..so have some formulas to send me?

What do you think about ther LL 1660..? Is suitable for this application.?

Thanks again,

MAurizio.

AndreasS · 10th December 2006, 09:15 AM

Quote:

Originally posted by Maurizio
...What do you think about ther LL 1660...

The LL1660 in connection 4:2,25+2,25 with the 6J5 or the LL1660S in connection 2,25:2+2 with two 6J5 or two systems of the 6SN7 in parallel.

Andreas

8th December 2006, 08:02 PM	#1
Maurizio diyAudio Member Join Date: Sep 2003 Location: Italy	6j5 trasformer coupled driver/splitter Hi All.. I want realize a push pull drived by a 6j5 ...transformer coupled.. How to choose the best primary impedance? The secondary will drive directly the grids of the 6v6.. I'm in trouble how to calculate the impedance on primary. Can anyone help me? Thanks, MAurizio

9th December 2006, 08:42 PM	#3
Maurizio diyAudio Member Join Date: Sep 2003 Location: Italy	thanks for help HI, Thanks for your help..so have some formulas to send me? What do you think about ther LL 1660..? Is suitable for this application.? Thanks again, MAurizio.

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8th December 2006, 08:30 PM	#2
AndreasS diyAudio Member Join Date: May 2005 Location: near Duesseldorf	Important is the primary inductance in relation to plate resistance of the tube (for the bass rollof), I calculate >10 Henrys for 1 kOhm of plate resistance (for the 6J5 more than 70 Henrys). Regards Andreas

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