Posts Tagged ‘amplifier’

D01: 2*15W guitar amplifier built using salvaged parts

Friday, June 7th, 2019

Davide Gironi writes, "The D01, litterally Discarica 01, is a guitar solid state amplifier build from salvaged parts." See the full post on his blog. Check out the video after the break. (more…)

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Arduino interface for TFA9842AJ power amplifier

Tuesday, May 7th, 2019

Dilshan Jayakody writes, "I tested a couple of TFA9842AJ based amplifiers in the last couple of years. The main reason I liked TFA9842AJ is its simple, clean design, wide operating voltage, and high-quality bass-rich audio output.  Thanks to it's built-in DC volume control circuit this audio amplifier can easily interface...

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ATtiny13 – 8bit mono class D amplifier

Thursday, February 21st, 2019

Łukasz Podkalicki shared a how-to on building a Class D amplifier on ATtiny13: I always wonder whether it is possible to make an amplifier of class D on ATtiny13 or not. Some time ago I found George Gardner’s project based on ATtiny85 – TinyD. It was a sign to start challenging it...

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Simple I2S stereo decoder with amplifier

Friday, February 1st, 2019

Dilshan Jayakody published a new build: In this project we build simple I2S stereo decoder with amplifier. To decode I2S data we use Princeton Technologies PT8211 16bit DAC. KA2206 audio power amplifier is used as driver stage of this system. Structure of this I2S amplifier is self-explanatory from the schematic....

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10MHz distribution amplifier

Thursday, March 15th, 2018

G4FRE built a 10MHz distribution amplifier: I have had a need for a distribution amplifier for a while now. Searching around I found the design by G4JNT in Radcom, which filled my needs. I redrew the circuit for 4 outputs and had PCBs made. (if you want one contact me!) ...

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Posted in DIY, PCBs | 2 Comments »

Adjustable gain LNA

Friday, June 9th, 2017

Mare published a new build: Low noise amplifiers are very useful. I built one with single BFG425W transistor with adjustable bias current. Project info at Mare & Gal Electronics homepage.

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The BF 15+15W open source power amp

Monday, November 14th, 2016

Boris Landoni from Open Electronics writes about the BF 15+15W open source power amp: The amplifier revolves around a monolithic integrated circuit for universal use, that is composed of two BF amplifier stages having a bridge output, that may be equated to operational amplifiers connected by a bridge and supplied...

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Automatic volume tracking for a TV

Wednesday, October 5th, 2016

An automatic volume tracker by KA7OEI: It occurred to me that I did have a reference on which I could base an outboard volume control: The internal speakers of the TV. I surmised that I could "listen" to the audio level coming out of the speakers and based on that, adjust the...

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Posted in DIY, hacks | 2 Comments »

LDMOS amplifiers

Friday, June 24th, 2016

Pete (N6QW) writes: This project encompasses proving an Arduino Control of a hi Power Linear Amplifier. It is a new departure for N6QW as it has extensive I/O requirements which required moving to the Mega 2560 a Arduino variant that has 56 Digital I/O and 16 Analog Inputs. The on...

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WA2EBY IRF510 amplifier

Monday, June 20th, 2016

Flathagen has published a new build: The WA2EBY amplifier is a famous linear amplifier project published in QST in March and April 1999 by Mike Kossor WA2EBY. As this amplifier can give up to 50W out with 1W drive, it is a perfect pair for my Softrock RXTX amplifier. The...

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Posted in DIY | 7 Comments »

Behringer v-tone GMX212 Hybrid tube amplifier mod

Monday, April 4th, 2016

Davide Gironi wrote a post on his blog showing how he modified the Behringer v-tone GMX212 Hybrid tube amplifier: For this project I've used 12AX7 vacuum tube. This tube is one of the most used for the guitar preamplification. So there are many resources available on web. The first problem i...

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Simple small QRO for HF

Friday, January 22nd, 2016

Marko Pavlin has been working on a HF amplifier project: I followed the ARRL Homberw challenge 50 watt aplifier entry. It is low cost, simple HF linear amplifier designed and built by the author as an entry in the ARRL’s 2009 Homebrew Challenge contest. The requirements of the amplifier were: 40...

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Posted in DIY | 1 Comment »

Tutorial on the theory, design and characterization of a CMOS transimpedance amplifier

Wednesday, December 23rd, 2015

Tutorial on the theory, design and characterization of a CMOS transimpedance amplifier from The Signal Path: In this episode, Shahriar and Shayan discuss the design and characterization of a deceptively simple CMOS inverter-based transimpedance amplifier. The the large and small signal behavior of the CMOS inverter is discussed and measured...

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Audio multiplexer with integrated amplifier

Wednesday, December 2nd, 2015

Audio multiplexer with integrated amplifier project by Matt Winslow, built as a capstone project for his masters in EE: This project is to act as a central hub for switching between audio sources and listening devices. Multiple audio sources can include a phone, computer, TV, etc. The listening devices can...

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Posted in DIY | 3 Comments »

50W LM3886 power amplifier

Tuesday, August 18th, 2015

A 50W LM3886 power amplifier project from Electronics-DIY: This is a second revision of 50W LM3886 power amplifier that is used to power two bookshelf speakers. The sound produced by LM3886 chip is excellent so I decided to make another amplifier with it. The schematic is based on the schematic...

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Posted in DIY | 1 Comment »

DIY 6EM7 Single-Ended Triode (SET) amplifier

Friday, July 10th, 2015

A DIY 6EM7 Single-Ended Triode (SET) amplifier from diyAudioProjects: This unique looking hi-fi amplifier was put together by Matt in a vertical wooden chassis that has been styled after early vacuum tube equipment of the 1920s.  The amplifier uses a single 6EM7 tube per channel. The 6EM7 tube has two...

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Cambridge audio A4 stereo Amplifier Mods

Tuesday, July 7th, 2015

Steve did a teardown and refurbishment of a Cambridge Audio A4 Amplifier: In this video, Steve disassembles a Cambridge Audio A4 Integrated Amplifier which he rescued before it was thrown away. The amplifier is refurbished with new electrolytic capacitors and a clean inside before performing a modification to make the dials...

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A signal amplifier module for HF

Monday, May 25th, 2015

Marcus Jenkins blogged about his radio frequency amplifier project he made using DirtyBoard PCB's In building QRP HF radios, having an RF signal level amplifier building block is handy. You want 50 Ohm output impedance, some reasonable gain, supply voltage of the usual 10-14V and ease of building using standard parts...

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Posted in, DIY | 2 Comments »

Low noise amplifier – 100MHz to 300MHz

Tuesday, May 19th, 2015

In this video Hpux735 demonstrates his Sky67015 LNA breakout board: A Low noise amplifier (or LNA) is a special amplifier that is designed to be the first amplifier in a receiver. It is vital that the first amplifier of a receiver has low noise, because the noise of the whole system...

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App note: 400MHz, 2500V/µs, 9mA single/dual operational amplifiers

Saturday, May 16th, 2015

400MHz, 2500V/µs, 9mA single/dual operational amplifiers (PDF!) application note from Linear Technology: FEATURES 400MHz Gain Bandwidth Product 2500V/μs Slew Rate –85dBc Distortion at 5MHz 9mA Supply Current Per Amplifier 6nV/√Hz Input Noise Voltage Unity-Gain Stable 1.5mV Maximum Input Offset Voltage 8μA Maximum Input Bias Current 800nA Maximum Input Offset Current 40mA Minimum...

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Posted in app notes | 1 Comment »

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