grid bias

cuallito · 13th April 2004, 04:31 AM

hey guys. it's late and i'm too lazy to go into detail (maybe tomarrow) but following the instructions here: http://www.tubecad.com/articles_2003...ier/index.html
when I was working on my minimalist amplifier design gave me a grid bias voltage of 17mV for a sv572-160 driver tube. Does that sound right?

dhaen · 15th April 2004, 07:43 AM

Clearly incorrect. Check the tube's datasheet.

billr · 19th April 2004, 06:49 AM

hi

here is a copy of the tech data sheet for the -160

http://www.svetlana.com\graphics\pro...\SV572-160.pdf

funny thing about the svetlana site is that all the information under the main banner is still there.

I could see that the bias point may in fact be 17volts, you need power to drive this thing, as it operates in A2, this means a low impedance source, probably a cathode follower, or an interstage tranny in the anode cct of the driver stage, with bias introduced through the other end of the secondary.

best of luck.

bill ramsay:

13th April 2004, 04:31 AM	#1
cuallito diyAudio Member Join Date: Apr 2004 Location: Milky Way	grid bias hey guys. it's late and i'm too lazy to go into detail (maybe tomarrow) but following the instructions here: http://www.tubecad.com/articles_2003...ier/index.html when I was working on my minimalist amplifier design gave me a grid bias voltage of 17mV for a sv572-160 driver tube. Does that sound right?

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15th April 2004, 07:43 AM	#2
dhaen diyAudio Moderator Emeritus Join Date: Jun 2002 Location: U.K.	Clearly incorrect. Check the tube's datasheet.

19th April 2004, 06:49 AM	#3
billr diyAudio Member Join Date: Dec 2003 Location: new zealand	hi here is a copy of the tech data sheet for the -160 http://www.svetlana.com\graphics\pro...\SV572-160.pdf funny thing about the svetlana site is that all the information under the main banner is still there. I could see that the bias point may in fact be 17volts, you need power to drive this thing, as it operates in A2, this means a low impedance source, probably a cathode follower, or an interstage tranny in the anode cct of the driver stage, with bias introduced through the other end of the secondary. best of luck. bill ramsay: