PP 300B ''transformer coupled''

x3me00 · 21st December 2011, 08:42 PM

Hi, next year i will be doing a school project. I was thinking of building a tube amplifier more specificly a PP-300B and i dont realy know why but somehow i have dicided that it should use a interstage transformer. I know the basics of how tubes work but i wouldnt say i know enought to design something myself. So iam basicly wondering if anyone knows a design something like this:

%20%20Uploaded%20with%20ImageShack.us[/IMG]

(My awsome paint skills but i guess you get the idea)

Regards

x3me00 · 21st December 2011, 09:35 PM

Seems link wasnt working

dsavitsk · 21st December 2011, 09:39 PM

Link does not work.

You have read this? The Amity, Raven, and Aurora

x3me00 · 21st December 2011, 10:02 PM

Quote:

Originally Posted by dsavitsk

Link does not work.

You have read this? The Amity, Raven, and Aurora

Yes i have but id rather skip the input transformer or is it possible to get a input transformer with differential input ?

Does the new link work?

kevinh · 21st December 2011, 10:38 PM

You don't have to have the input transformer. If you look at the Raven Pre amp you will see it is a balanced output so the input to the amp is a balanced input.

Read the whole Amity and Karna page and use the parts that fit your design. If you want a single ended input you can use an interstage transformer as a phase splitter.

Note what Lynn has to say about the power required to properly drive the grid of the 300.

21st December 2011, 08:42 PM	#1
x3me00 diyAudio Member Join Date: Mar 2011	PP 300B ''transformer coupled'' Hi, next year i will be doing a school project. I was thinking of building a tube amplifier more specificly a PP-300B and i dont realy know why but somehow i have dicided that it should use a interstage transformer. I know the basics of how tubes work but i wouldnt say i know enought to design something myself. So iam basicly wondering if anyone knows a design something like this: %20%20Uploaded%20with%20ImageShack.us[/IMG] (My awsome paint skills but i guess you get the idea) Regards

21st December 2011, 09:39 PM	#3
dsavitsk diyAudio Member Join Date: Jan 2005 Location: Chicago	Link does not work. You have read this? The Amity, Raven, and Aurora __________________ http://www.ecpaudio.com

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21st December 2011, 09:35 PM	#2
x3me00 diyAudio Member Join Date: Mar 2011	Seems link wasnt working

21st December 2011, 10:38 PM	#5
kevinh diyAudio Member Join Date: May 2007	You don't have to have the input transformer. If you look at the Raven Pre amp you will see it is a balanced output so the input to the amp is a balanced input. Read the whole Amity and Karna page and use the parts that fit your design. If you want a single ended input you can use an interstage transformer as a phase splitter. Note what Lynn has to say about the power required to properly drive the grid of the 300.

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