That's the beauty of living here when you have a hobby of electronics. My amp has a few extra features that I believe allow it to surpass the design in this document. It produces a higher output wattage, and thermal and mute features are added too. Hi. Tip After building and listening to Jean Hiraga's "Le Monstre", a 8W Class-A Amplifier, I wanted to build "Le Monstre's" bigger brother "The 20W Class A" amplifier.Having read Jean Hiraga's article Construction of a 20W Class-A Amplifier and in copies of the old French magazine "L'Audiophile", I was interested to hear for myself how Le Monstre's bigger … I didn't realize how much sweeter the amp could sound with such a simple change. Just drill holes for the binding posts and RCA jacks to fit snuggly and tightly on the rear panel. I altered the values to the IRFP240 power mosfet gate C/R--this mosfet pair is the voltage regulator for the third stage. Retro Analog Audio VU Meter From Scratch! Naturally, I soldered in the pair of 392 ohm resisters in series with the existing 220s and turned the thing on. The fasteners are mainly countersunk stainless M5 or M3 stainless. thank you, About: Hi I'm Angelo (TechBulder)! Can't you just plug your input from your CD player, FM receiver, Ipod, or whatever directly into the gainclone? The LM3886 is a high-performance audio power amplifier capable of delivering 68W of continuous average power to a 4Ω load and 38W into 8Ω with 0.1% THD+N from 20Hz–20kHz. There's a PDF file provided below, the height and width is set, don't worry of resizing the image. _______________________________________________, The LM3886 is the brother of the LM3875. The only modification required to the circuit would be to increase the power supply voltage from 24.5 volt to 29.5, and swap out the chokes.I moved an AC input lead on the power transformer and voila, 29.5 volts. My simulation tends to contradict that arguement, but like I said, it's only a simulation. The inputs are balanced, but can be run single-ended; use whatever fits your requirements. This is a very interesting project, thanks for sharing. Instead of 220uF, I inserted my favorite sounding Panasonic capacitor rated at 10uF. The performance of the LM3886, utilizing its Self Peak Instantaneous Temperature (°Ke) (SPiKe™) protection circuitry, puts it in a class above discrete and hybrid amplifiers by providing an inherently, dynamically protected Safe Operating Area (SOA). I tried to look for it but could not find. Iron is great when you want a lot of inductance in a small package, not to mention lower resistance--iron inductors use less wire which means less resistance. output power into 4Ω at VCC = ±28V on Introduction. Crusing the internet the other day, I stumbled across this 1978 patent. My project cost me P870.00 ($21.75) all in all.Parts: In our circuit, 2 Amperes will be drawn per line and we use 10000uF capacitors. The gate/source voltage on the second stage mosfets is now 3.65 volts.The results are extremely positive. Construction of a Class-A Amplifier. I listened to the entire CD as if it were my first time. I'm prototyping several versions of this particular design and will post results as they arrive.In this design, I did a good job of matching transistors in the differential pairs. It would be great if you can clarify on this. great project!! I can get these devices for about $7.50 apiece--seems less challenging than purchasing a handful of 2SK-170 jfets and hoping to find decent matches; out of 20, I only found four pair.
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