Ultra-Linear 6T9 DIY Tube Amplifier It was always my intention to build two 6T9 vacuum tube amplifiers. For the first one I used a baking pan for the chassis and I was interested to hear just how good these simple single-ended (SE) tube amps could be with just basic components. From the first hour of play I was very impressed with just how musical they are when matched with the right speakers. My second build of this amplifier incorporated a lot of the original parts but this time more attention was paid to the construction and small upgrades to capacitors and the power supply. I also found that the sound could be further improved by converting the kit to operate from Pentode mode to Ultra-Linear (UL) mode. Both amplifiers are Class A. 100W HiFi MOSFET Amp This is a high fidelity 100W MOSFET Amplifier. The benefits of using MOSFETs in the output stage is that they have a high input impedance at low frequencies, and are capable of extremely high slew-rates. This very attribute makes them rather prone to HF oscillation when improperly compensated, but with careful design they’re capable of delivering an impressive performance. The Leach amp 200W amplifier This article descripts, how I built amplifier from Mr. Marshall Leach known like “The Leach Amp”. I built amplifier from the original instructions on these pages: http://users.ece.gatech.edu/~mleach/lowtim/. Article about bulding of this amplifier I found later in journal A_Radio Praktická elektronika 11/2002. For many years I looked for construction of HiFi amplifier wit a good parameters, enough power reserve and simple construction. LM3886 Power Amp with DIY Chassis This is a simple chassis using just 4 aluminum panels and 2 heatsinks. Designed around dimensions to tightly pack in a LM3886 chip amp kit. The top and bottom panels sit in ridges cut into the heatsinks with a table saw, and then the front and back panels just bolt into the end fins. Rear panel fixings are held with M3 nut and bolts, and panels that join to the heatsinks are held by M4 bolts tapped directly into the heatsinks so no additional brackets are required. Heatsinks are 75 x 160 x 50mm with a 10mm thick base. A4 Power Amplifier As the stunningly original name suggests, the A4 contains 4 separate power amplifiers. This unit offers great flexibility - the following modes of operation are available: * Four-channel 50 watts per channel operation for surround-sound or multi-room operation. * Two-channel bi-amped mode, for suitably bi-wireable loudspeakers. * Two channel Bridged mode, offering around 150 watts per channel. LM3886 Gainclone 2×68 Watt Full Amplifier Project In this application, we are building a Gain Card like amplifier. This application type is named Gainclone in audio world. To take a satisfactory audio response, we are adding a Linkwitz equaliser to the feedback line and adding bass compensation also. We are using LM3886 which is the revised version of its brother LM3875. Briefly features of LM3886 are: * Maximum Output Power: 68W RMS - 108W Peak * THD: %0.03 at 60W * SNR: 110dB at 60 W - 92.5dB at 1W * PSRR: 120dB * Protection Circuitries: DC/AC Short circuit protection and thermal protection * Output Class: Conjugate AB-A DIY 6T9 Push-Pull Tube Amplifier Project This tube amplifier is constructed uses point-to-point connections and the majority of the parts have been salvaged from old electronics. The amplifier uses 6T9 compactron vacuum tubes in a push-pull output stage. The preamp section uses 12AX7A tubes. 12AU7 / IRF612 MOSFET Hybrid Headphone Amplifier A simple two stage hybrid headphone amplifier project. The voltage stage uses a vacuum tube which feeds a MOSFET follower output stage. Unlike a lot of vacuum tube projects, this one is low voltage. Both the tube and mosfets use the same 12-13V power supply. Minty pre-amp freshens your ears Yet another Altoids tin inspired project. This time the “MintyMic” case includes a powered microphone and preamp with line-level outputs and adjustable gain control. Best of all the whole project comes as a kit, or you can get your own parts and follow the instructions on the site, or it can even be shipped pre-assembled for the lazy maker. CMoy Headphone Amplifier CMoy is a very simple and portable headphone amplifier. The amplifier was originally posted by Chu Moy on headwize.com. Headphones amplifiers are usually used when the output of a device is to low for the kind of headphones you’re using, or to get better sound quality by keeping the device on a medium volume setting and amplifying the sound with the headphone amplifier. I’ve not build this amplifier so far, so i cant tell you from my personal experience if it sounds good or bad, but from what i read on the internet, users that build it are very happy with the results. The schematic is very simple, parts are easy accessible so it should go really smooth with the building process if you decide to do it. |
Categories |
CircuitBook.com (C) 2009
Any logo, trademark and project represented here are property of their respective owner