Is Thier Away To Clear Up Distortion??? - diyAudio
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Old 22nd October 2007, 07:52 PM   #1
prorms is offline prorms  United States
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Default Is Thier Away To Clear Up Distortion???

I WAS WONDERING IS THIER A WAY TO CLEAR UP THE DISTORTION
ON THIS PREAMP IN PUT AT 10 mV Pk I think thier about 10% to 40% distortion this has been only simulated stage
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Old 22nd October 2007, 11:13 PM   #2
ilimzn is offline ilimzn  Croatia
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By giving the tube proper bias and plate voltages, for starters???
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Old 22nd October 2007, 11:24 PM   #3
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Old 22nd October 2007, 11:36 PM   #4
prorms is offline prorms  United States
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http://www.mif.pg.gda.pl/homepages/frank/sheets/093/1/12AU7A.pdf

the data sheet link i can only go as high as 13.5 volts unless know a better tube that works at 12 v or so????
iam not sure were the bais is also thier an example application on that datasheet think i need to change the design fit more like the one in the datasheet ????????


do not build this preamp unless want a distored signal

also numbered the parts
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Old 23rd October 2007, 12:15 AM   #5
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Don't be offended but you clearly don't know much at all about the use of tubes. They are not remotely like solid state devices and they can't be connected up in the same way. Rather than asking questions here, you might like to start by reading some informative literature until you understand it. There are plenty of helpful websites and I've found Max Robinson's 'Fun with Tubes' to be quite well-explained.
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Old 23rd October 2007, 12:18 AM   #6
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Old 23rd October 2007, 06:22 AM   #7
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Default Re: Is Thier Away To Clear Up Distortion???

Quote:
Originally posted by prorms
I WAS WONDERING IS THIER A WAY TO CLEAR UP THE DISTORTION
ON THIS PREAMP IN PUT AT 10 mV Pk I think thier about 10% to 40% distortion this has been only simulated stage
Yeah. Don't build it. That schemo is just soooooooooooooo wrong.
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Old 23rd October 2007, 07:16 AM   #8
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it is pretty wretched... maybe he can learn something though..
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Old 23rd October 2007, 08:49 PM   #9
6f6 is offline 6f6  United States
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In all likelihood this device would not even turn "on". A triode tube operates somewhat like a depletion-mode n-channel FET. The 12v that you see is the reverse bias needed to operate the tube. The "drain" of a triode is is refered to as the plate; plates typically need 90- 250v in order to operate properly.
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Old 23rd October 2007, 10:35 PM   #10
Jeb-D. is offline Jeb-D.  United States
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If you want to do a 12V tube project check out the tubes mentioned on this page.

http://www.duntemann.com/12vtubes/12vtubesindex.htm

Most of the tubes can be found on ebay.
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