Building a 6s45P amp - transformer help

trondareo · 25th February 2011, 11:02 AM

Hi,
I´m building a SE 6s45P amp similar to this Singularity and have a couple of questions:

For a filament transformer I have a 12,7v lying around, would it be advisable to heat two tubes in series? Will individual tube differences cause drift?

For output transformers I am considering Edcor GXSE10-6-5K which is only 6ohm out. I am guessing that 6ohm output is a happy middle when I have several speakers ranging from 3,6 ohm to 6 ohm to 8 ohm.

Anode load is 5K, operating point 150v, 30mA

Shoog · 25th February 2011, 01:22 PM

Series wired heaters generally causes no issues - I have done it many times.

Shoog

trondareo · 25th February 2011, 03:03 PM

Great, that´s just what I needed to hear

25th February 2011, 11:02 AM	#1
trondareo diyAudio Member Join Date: Feb 2009 Location: Trondheim	Building a 6s45P amp - transformer help Hi, I´m building a SE 6s45P amp similar to this Singularity and have a couple of questions: For a filament transformer I have a 12,7v lying around, would it be advisable to heat two tubes in series? Will individual tube differences cause drift? For output transformers I am considering Edcor GXSE10-6-5K which is only 6ohm out. I am guessing that 6ohm output is a happy middle when I have several speakers ranging from 3,6 ohm to 6 ohm to 8 ohm. Anode load is 5K, operating point 150v, 30mA __________________ I´m doing stuff at http://taooftubes.blogspot.com/

25th February 2011, 03:03 PM	#3
trondareo diyAudio Member Join Date: Feb 2009 Location: Trondheim	Great, that´s just what I needed to hear __________________ I´m doing stuff at http://taooftubes.blogspot.com/

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25th February 2011, 01:22 PM	#2
Shoog diyAudio Member Join Date: Aug 2002 Location: Eire	Series wired heaters generally causes no issues - I have done it many times. Shoog