Automatic Bias Control sliding bias

litefoot22 · 23rd April 2011, 07:36 PM

Automatic Bias Control or sliding bias. There is a rather interesting article on the Brooks Amplifier in one of the audio magazines this month. I was quite intrigued in the idea. The idea is rather simple, a Push Pull is biased for class A. As the signal increases above 5 watts output, The bias Ckt increases the bias and slides the tubes into class AB1. Higher output the tubes slide into class AB2. The Brooks amp is from 1947 and a bit dated has anyone experimented with the Ckt. Any input would be welcome. George

litefoot22 · 23rd April 2011, 10:37 PM

Here is a link to the brooks...George
http://www.tubecad.com/2007/12/15/Hi...%20Control.pdf

23rd April 2011, 07:36 PM	#1
litefoot22 diyAudio Member Join Date: Apr 2011 Location: Cocoa Florida	Automatic Bias Control sliding bias Automatic Bias Control or sliding bias. There is a rather interesting article on the Brooks Amplifier in one of the audio magazines this month. I was quite intrigued in the idea. The idea is rather simple, a Push Pull is biased for class A. As the signal increases above 5 watts output, The bias Ckt increases the bias and slides the tubes into class AB1. Higher output the tubes slide into class AB2. The Brooks amp is from 1947 and a bit dated has anyone experimented with the Ckt. Any input would be welcome. George

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Dynamic Bias - Active Bias - Automatic/Self biased - Overview wanted	tiefbassuebertr	Pass Labs	11	5th May 2011 08:42 PM
Any new design sliding bias amps out there ?	Jakobsson	Solid State	7	9th October 2010 09:20 AM
Krell's sustained plateau sliding bias	h_a	Solid State	2	9th December 2008 04:31 PM
Stray hum pickup preamp cathode R-bias vs. battery bias & 12AU7vs.5687	awedio	Tubes / Valves	2	19th April 2008 01:30 AM
Supressed bias amplifier, automatic variable bias system.	destroyer X	Solid State	2	20th September 2004 10:24 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read

23rd April 2011, 10:37 PM	#2
litefoot22 diyAudio Member Join Date: Apr 2011 Location: Cocoa Florida	Here is a link to the brooks...George http://www.tubecad.com/2007/12/15/Hi...%20Control.pdf

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)