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Old 25th September 2012, 04:53 AM   #1
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Default Irf510 mosfet amp

Hello, I am new to electronics. It has recently become a hobby. I have built a few guitar pedals and small amps. My project I'm working on now is an irf510 amp. The schematic is by beavis audio. I would like to add a pre amp and I have tried the ehx lpb1 booster, but it seems to bring the volume down a lot. What is going on?
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Old 25th September 2012, 09:45 AM   #2
DF96 is offline DF96  England
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I will ask Mystic Meg. She will stare deep into her crystal ball and tell you not only what you have done, but also what you are about to do. She only charges 5 per session.

If you can't afford her fee then a cheaper alternative is to tell us exactly what you have done, with diagrams etc. We need these because, unlike Meg, we can't read your mind.
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Old 25th September 2012, 11:12 AM   #3
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Quote:
Originally Posted by DF96 View Post
I will ask Mystic Meg. She will stare deep into her crystal ball and tell you not only what you have done, but also what you are about to do. She only charges 5 per session.

If you can't afford her fee then a cheaper alternative is to tell us exactly what you have done, with diagrams etc. We need these because, unlike Meg, we can't read your mind.

Ha ha ha, absolutely........
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Old 25th September 2012, 12:40 PM   #4
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This is the link to the schematic of the amp. http://www.beavisaudio.com/techpages..._Schematic.gif

This is the schematic of the lpb1
http://www.beavisaudio.com/techpages...eality/am1.gif
Attached Images
File Type: gif IRF510_MOSFET_Amplfier_Schematic.gif (14.4 KB, 242 views)
File Type: gif am1.gif (7.5 KB, 215 views)
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Old 25th September 2012, 01:03 PM   #5
DF96 is offline DF96  England
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Measure DC voltages. Tell us what they are.
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Old 26th September 2012, 02:16 PM   #6
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How do I do that? I have a multimeter. Like I said I am a beginner with this stuff. I have done what the schematic said and measured 1/2 of the supply voltage at the drain of the transistor.
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