Ruby : A battery-powered amplifier Ruby is a battery-powered amplifier.Ruby has many shades of sparkly clean all the way up to a great, natural overdrive. The input buffer helps to retain treble detail going into the LM386 chip. As you increase the Volume, you will start getting nice breakup. 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. 20W Audio Amplifier using LM1875 20W Audio Amplifier kit is based on LM1875 IC. * Power supply - 48 VDC * Output - 20 W, 4 Ω * Very low distortion (THD - 0.015%), good channel separation and ripple rejection * IC built-in thermal, short circuit protections * Internal output protection diodes * Terminal pins for connecting input * Power Battery Terminal (PBT) for easy power supply and speaker connection * Power-On LED indicator * Heatsink for IC * Four mounting holes of 3.2 mm each with nut and stud * PCB dimensions 48 mm x 60 mm 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. Low Cost 2×20 Watt Stereo Amplifier by TDA2005 This circuit is a small stereo amplifier for all suitable applications like amplifying small speakers, boxing, etc. It is also suitable for car use but before, the power supply must be choked with at least 150mH and it must give up to approximately 6 to 7 amps during the upstream performance. 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. Tiny audio amplifier using LM386 The Tiny Audio Amplifier kit is a good choice for battery operation. It is based on LM386 IC. * Power supply - 6 - 12 VDC * Output power - 1 W, 8 Ohm * The quiescent power drain is only 24 mW when operating from 6 VDC * Self-centering output quiescent voltage * Onboard PRESET to adjust volume * Terminal pins for connecting power supply, audio signal and speaker * Power-On LED indicator * ON/OFF PCB mounted slide switch for power supply * Four mounting holes of 3.2 mm each * PCB dimensions 44 mm x 44 mm 20W Bridge Audio Amplifier 20W Bridge Audio Amplifier kit, based on the TDA2005 IC, a class B dual audio amplifier, specifically designed for car radio applications etc. Power supply - 18 VDC * Output power - 20 W, 4 Ω * IC built in Thermal Shut-down, Load dump voltage surge protected * Terminal pins for connecting left and right audio signal inputs * Relimate Connector for connecting Potentiometer (POT) for volume adjustment * Power Battery Terminal (PBT) for easy power supply and speaker connection * Power-On LED indicator * Heatsink for IC * Four mounting holes of 3.2 mm each with nut and stud * PCB dimensions 63 mm x 65 mm 100W Guitar Amplifier Mk II This amp is rated at 100W into a 4 Ohms load, as this is typical of a “combo” type amp with two 8 Ohm speakers in parallel. Alternatively, you can run the amp into a “quad” box (4 x 8 Ohm speakers in series parallel and will get about 60 Watts. For the really adventurous, 2 quad boxes and the amp head will provide 100W, but will be much louder than the twin. This is a common combination for guitarists, but it does make it hard for the sound guy to bring everything else up to the same level. [via] |
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