How biasing mA in tubes - Page 2

Harleyjon · 26th January 2013, 04:11 PM

If 5mA is flowing through one valve then the same will be flowing through the other.
You will have to calculate the anode and cathode resistor values to reach the 5mA.

merlin el mago · 26th January 2013, 04:15 PM

Thanks for all help.

Harleyjon · 26th January 2013, 04:25 PM

This may help in your calculations

http://www.mh-audio.nl/Downloads/Tub...s/Ei-ECC81.pdf

Regards

merlin el mago · 26th January 2013, 04:30 PM

Thanks again, you are very kind. Do you know a free and easy simulator to calculate the new resistor values?

Cheers

yagoolar · 26th January 2013, 04:49 PM

Have you tried LTspice?

merlin el mago · 26th January 2013, 04:50 PM

It's easy and free?

yagoolar · 26th January 2013, 04:51 PM

Free - yes. Quite easy.
A lot of tube models and knowledge across the Internet. A lot of people use it here also.

merlin el mago · 26th January 2013, 04:53 PM

Where can get it?

yagoolar · 26th January 2013, 04:55 PM

Quote:

Originally Posted by merlin el mago

Where can get it?

http://www.linear.com/designtools/software/

merlin el mago · 26th January 2013, 05:07 PM

Thank you, do you know if are installed the tubes in the LTspice library?

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26th January 2013, 04:11 PM	#11
Harleyjon diyAudio Member Join Date: Dec 2012 Location: England	If 5mA is flowing through one valve then the same will be flowing through the other. You will have to calculate the anode and cathode resistor values to reach the 5mA.

26th January 2013, 04:15 PM	#12
merlin el mago diyAudio Member Join Date: Sep 2009 Location: Catalonia new Europe state	Thanks for all help.

26th January 2013, 04:25 PM	#13
Harleyjon diyAudio Member Join Date: Dec 2012 Location: England	This may help in your calculations http://www.mh-audio.nl/Downloads/Tub...s/Ei-ECC81.pdf Regards

26th January 2013, 04:30 PM	#14
merlin el mago diyAudio Member Join Date: Sep 2009 Location: Catalonia new Europe state	Thanks again, you are very kind. Do you know a free and easy simulator to calculate the new resistor values? Cheers

26th January 2013, 04:49 PM	#15
yagoolar diyAudio Member Join Date: Oct 2004 Location: Mazowieckie, Jozefoslaw	Have you tried LTspice?

26th January 2013, 04:50 PM	#16
merlin el mago diyAudio Member Join Date: Sep 2009 Location: Catalonia new Europe state	It's easy and free?

26th January 2013, 04:51 PM	#17
yagoolar diyAudio Member Join Date: Oct 2004 Location: Mazowieckie, Jozefoslaw	Free - yes. Quite easy. A lot of tube models and knowledge across the Internet. A lot of people use it here also.

26th January 2013, 04:53 PM	#18
merlin el mago diyAudio Member Join Date: Sep 2009 Location: Catalonia new Europe state	Where can get it?

26th January 2013, 05:07 PM	#20
merlin el mago diyAudio Member Join Date: Sep 2009 Location: Catalonia new Europe state	Thank you, do you know if are installed the tubes in the LTspice library?