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12AX7 Valve Audio Preamplifier - And we swore we would never do another valve audio project. Who was it that said "bottles" were dead? __ SiliconChip
14Watt Audio Amplifier + pre-amp & tone control - This is the schematic diagram of 14 watt power audio amplifier included the pre-amp circuit and tone control circuit. I think this is complete audio system, just need an input and output (speaker)
2 MHz Bandwidth PIN Photodiode Preamp with Dark Current Compensation - The EVAL-CN0272-SDPZ board contains the circuit to be evaluated, as described in this note, and the SDP-B controller board is used with the CN0272 Evaluation Software to capture the data from the EVAL-CN0272-SDPZ circuit board. Equipment Needed The following equipment is needed:, Bullet text, Getting Started Load the evaluation software by placing the CN0272 evaluation software into the CD drive of the PC. Using My Computer, locate the drive that contains the evaluation software. Launch the evaluation software and connect the USB cable from the PC to the Mini-USB connector on the SDP-B board. __ Analog Devices from the Lab
2-Channel Guitar Preamplifier, Pt 1 - Each channel has bass, mid and treble controls and there's an optional digital reverberation unit as well. __ SiliconChip
2-Channel Guitar Preamplifier, Pt 2 - Add life to your music with this easy-to-build digital reverberation board. It uses two digital delay chips to give realistic effects. __ SiliconChip
2-channel Guitar Preamplifier, Pt 3 - Pt.3: Building the preamps and reverb module into a metal rack case __ SiliconChip
2-wire remote sensor preamp - 01/13/14 EDN-Design Ideas Locally condition and amplify a distant sensor using only a two-wire connection for both power and signalThis Design Idea implements a remote sensor preamp (e.g., for a piezoelectric transducer) which transfers both signal and power over a single wire pair or coax__ Circuit Design by Vladimir Rentyuk
450MHz-800MHz UHF Preamplifier - This circuit is designed to work at UHF frequencies in the range 450-800MHz. It has a gain of around 10dB and is suitable for boosting weak TV signals __ Designed by Andy Collison
A 12AX7 Valve Audio Preamplifier - And we swore we would never do another valve audio project. Who was it that said "bottles" were dead? __ SiliconChip
Altec 1564A Preamp Power Supply - Schematic only
Altec 428B Microphone Preamplifier schematic - Schematic only
An RIAA Preamplifier for Magnetic Cartridges - Many modern amplifiers lack phono inputs. This preamplifier solves that problem. __ SiliconChip
Antenna & RF preamp for weather satellites - All the details for a simple turnstile/reflector antenna plus an RF preamp that mounts up on the mast to really drag on those satellite images. __ SiliconChip
API 321 mic preamp schematic - Schematic only, no circuit description __ Designed by Alan Garren
Audio Preamplifier - A 2 stage audio pre-amplifier with very good performance. This preamplifier has two direct-coupled common emitter stages and uses series-voltage feedback. The circuit has high input impedance, low output impedance, voltage gain can be set independently and has low noise levels and good signal noise ratio. __ Designed by Andy Collison
Audio Pre-Amplifier - Circuit Only __ Designed by Tony van Roon VA3AVR
Audio PreAmplifier (Reconnsworld) - This is a very easy circuit to buildall parts can be found at the local electronics shopno matter how worthless it (the local shop,) usually is. __ Designed by Andy Wilson
Automatic Charger for Battery Operated Hi-Fi Preamps - For those who want the cleanest possible DC for sensitive preamps, battery power is ideal. At last, remembering to turn the charger back on is no longer a problem! This project is one for the experimenter, but as shown will work extremely well. The sensing circuit can be made so sensitive that a load of only 2.5mA is enough for the circuit to detect, and disconnect the charger. __ Designed by Rod Elliott ESP
Balanced Mic Preamp for PCs & MP3 Players - Want to connect a professional microphone with balanced outputs to the line input of your PC's soundcard or an MP3 player, for high-quality voice recordings? This microphone preamp circuit lets you do just that. It features a balanced input, has a clipping indicator LED and can be powered from a USB port or from an external DC source. __ SiliconChip
Balanced Microphone Preamp - As I said in my cheapo digital audio project document, I was going to build a microphone preamp to attach a Behringer ECM8000 measurement microphone to line input of my minidisc deck. After scanning the web to see if similar projects existed, I basically found three kindsones that used transformers (ie. pretty expensive to start with) and some even followed those with tubes and another transformer (damn expensive). __ Designed by © Madis Kaal
Balanced Microphone Preamp - Rugged design includes a 3-band equaliser. It also features balanced and unbalanced outputs, and can drive a stereo or guitar amplifier. __ SiliconChip
Balanced Low Noise Microphone Preamp - A discrete front end makes this balanced microphone preamp very quiet __ Designed by Rod Elliott ESP
Band 2 PreAmplifier - This is a VHF amplifier for the Band 2 Radio Spectrum tuning approximately 88108 Mhz. __ Designed by Andy Collison
Bass/Treble Tone Control-Op Amp - another bass and treble boost tone control giving better performance using a single op-amp __ Contact: P. Townshend EduTek Ltd
Bride of Zen - The Bride of Zen (BOZ), designed by Nelson Pass and described in The Audio Amateur, 1994, is a very simple line-level preamplifier which contains only a single medium-power MOSFET per channel (see the schematic on this page). Mr. Pass has given a very lucid account of the design philosophy. Building instructions including the lay-out for a printed circuit board can be downloaded from Passlabs. According to mr. Pass, the variable resistor P102 should be adjusted in such a way that the voltage drop over resistor R108 (in the absence of an input signal) is 4 Volts. However, in my own homebuilt BOZ I found this to be incorrect. The preamp sounded good using a cassette deck or an FM tuner as the signal sources. However, using a CD player a nasty form of distortion occurred during crescendos. __ Designed by Aren van Waarde
Build a good GaAs FET preamp for 2 meters, 222MHz or 440MHz - This circuit will work on 2 meters, 220 or 440 Mc. Some part values are different for the 3 bands, however general layout and construction are similar. __ Designed by © Kevin K. Custer W3KKC
Build this magnetic cartridge preamplifier - Do you have an old turntable but no RIAA inputs on your preamplifier? If so, you need this preamplifier for playback and for converting them to CD or MP3 format. __ SiliconChip
Carbon Mike Preamp BPF-W6GXN - Schematic only __ Designed by va3iul
Computer Microphone - This circuit was submitted by Lazar Pancic from Yugoslavia. The sound card for a PC generally has a microphone input, speaker output and sometimes line inputs and outputs. The mic input is designed for dynamic microphones only in impedance range of 200 to 600 ohms. Lazar has adapted the sound card to use a common electret microphone using this circuit __ Designed by Andy Collison
Condenser Mic Preamplifier - This is a very simple preamplifier circuit for condenser microphone. This mic preamplifier also can be used for dynamic microphone.
Dual Mike Preamp power supply Gerber - Gerber Zip file for project __ Contact: info @ forsselltech . com
Dual Transformerless Class a Discrete Mike Preamp - Uses JMP-1 Modules __ Contact: info @ forsselltech . com
Dynamic Microphone Preamplifier - A low noise pre-amplifier suitable for amplifying dynamic microphones with 200 to 600 ohm output impedance. __ Designed by Andy Collison
Dynamic Mike Preamplifier for IC-706-W5RK - Schematic only __ Designed by va3iul
Electret MIC Amplifier - The Elecraft XG2 is a crystal oscillator with accurate 1 µV and 50 µV output levels. It's
ideal for receiver test and alignment. The 1-µV output can be used to measure a receiver's
sensitivity, while the 50-µV output is useful for S-meter calibration. Switch-selected
output frequencies of 3579, 7040, and 14060 kHz provide convenient test signals on 80,
40, and 20 meters; harmonics of these frequencies can be used for measurements on
higher bands __ Designed by Andy Wilson
Electret Mic Booster - NOTE
: Must register on this site __ Designed by Published in Elecktor July/Aug, 2010
Electric Guitar Preamplifier - This is a circuit for a guitar preamplifier that can capture mechanical vibrations (any standard guitar pickup) and then convert them into an electrical signal. The signal is then amplified by an audio amplifier. __ Electronics Projects for You |
