Taking CFB to the extremes...? - Page 2

Fuling · 14th September 2006, 05:25 PM

And from below:

Fuling · 14th September 2006, 05:26 PM

With cover (unfinished):

Fuling · 14th September 2006, 05:28 PM

And the PSU. The toroid and the heatsink/tagboard makes the HV supply, the rest is for the heaters:

Fuling · 14th September 2006, 05:30 PM

My matching active crossover, built with discrete JFETs on tagboards. 12dB/oct 90Hz Linkwitz-Riley.

Fuling · 14th September 2006, 05:32 PM

Inside view:

pmillett · 14th September 2006, 11:35 PM

Maybe this is a little late since you've already built the amp... but you might find this interesting:

http://www.pmillett.com/Books/lockhart.pdf

An example of extreme cathode and screen grid feedback...

Pete

Fuling · 15th September 2006, 10:01 AM

Thank you for the very interesting url!

Fuling · 15th September 2006, 09:50 PM

I believe I´ve forgotten to post schematics of the power amps:

Edit: In the real version there is no voltage divider for the screen grids, the grids goes straight to B+ through 1,5kohm carbon composite grid stoppers.

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14th September 2006, 11:35 PM	#16
pmillett diyAudio Member Join Date: May 2005 Location: Dallas (but I am not a Texan!)	Maybe this is a little late since you've already built the amp... but you might find this interesting: http://www.pmillett.com/Books/lockhart.pdf An example of extreme cathode and screen grid feedback... Pete

15th September 2006, 10:01 AM	#17
Fuling diyAudio Member Join Date: Aug 2001 Location: Sweden (Mora)	Thank you for the very interesting url!

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