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Old 8th July 2011, 09:48 PM   #1
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Default Problem with Champ build

I'm building a Fender champ style amp. Using a 6l6 instead of 6v6. The problem is the power I'm getting out. About .5 watts. I've checked the voltages on the 6l6 its 360v on the plate 345v on g2 the tube is drawing current around 50ma everything seems normal but no power or very litle I even tried a diferent OT same thing. I'm sure the problem is simple but i dont know were else to look. This is not my first champ build my other one puts out over 5w. I need some help please!
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Old 9th July 2011, 01:36 AM   #2
jjman is offline jjman  United States
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Schematic? Scope? Wrong NFB resistor?

What is the cathode voltage and resistor on the 6L6? What is the p-p voltage on the grid of the 6L6 before clipping/clamping is observed?
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Old 9th July 2011, 03:59 AM   #3
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Perhaps one of the earlier stages is goofy,and isn't sending enough signal to the grid of the 6L6? Just a random thought.
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Old 9th July 2011, 04:14 AM   #4
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Does it go from clean to dirty when you increase volume? Do you get low power on dirty sound?
The Devil is not so terrible as his math model is!
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Old 9th July 2011, 07:44 PM   #5
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Thanx for the input guys! I found the problem was in my power supply, a choke with a high dc resistance that I shouldn't have used. Basicly it murdered my HT voltage. A silly mistake! Oh well a learning experience for sure!
Thanx again!
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