Tube frontend....

Skorpio · 6th April 2006, 10:23 AM

Hello,

I am looking for at front end for my amp project. I have already the output buffer running: Bipolar non-feedback buffer in class A, running form +/-20V supply.

My next step is a tube front end able to drive the buffer to full output.

My idea is to use a two-stage amplifier, with a ECC83 as gain stage and a ECC82 as buffer.

Will this work out? Will a stage like this be able to deliver undistorted drive for the buffer?

lndm · 6th April 2006, 02:19 PM

It's been several years since I tried something like this but IIRC, driving a bipolar output stage directly was difficult and I decided to use a bipolar driver. It could be done with a power valve though. I also used a Mosfet output stage and the capacitive load at the top end was around 1k5. Kind of steep for a valve but definately doable.

6th April 2006, 10:23 AM	#1
Skorpio diyAudio Member Join Date: Mar 2004 Location: Denmark	Tube frontend.... Hello, I am looking for at front end for my amp project. I have already the output buffer running: Bipolar non-feedback buffer in class A, running form +/-20V supply. My next step is a tube front end able to drive the buffer to full output. My idea is to use a two-stage amplifier, with a ECC83 as gain stage and a ECC82 as buffer. Will this work out? Will a stage like this be able to deliver undistorted drive for the buffer?

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6th April 2006, 02:19 PM	#2
lndm diyAudio Member Join Date: Mar 2006 Location: nsw	It's been several years since I tried something like this but IIRC, driving a bipolar output stage directly was difficult and I decided to use a bipolar driver. It could be done with a power valve though. I also used a Mosfet output stage and the capacitive load at the top end was around 1k5. Kind of steep for a valve but definately doable.