audio mic

40 links

How to straighten Microbore copper tube - Article and video showing a technique to straighten Microbore copper pipe that is useful in antenna construction. This technique has been implemented to build a Quadrifiliar Helix antenna.
[ Hits: 326 | Votes: 0 | Rating: 0 ]

Ingham County Public Safety - Listen to Ingham County Michigan Public Safety, County Sheriff, Police and Fire
[ Hits: 403 | Votes: 0 | Rating: 0 ]

Optimizing TX/RX Levels in WSJT-X - Exploring digital radio modes, the author rethinks how to adjust transmit and receive levels in WSJT-X. Despite effective communication using Yaesu's settings, a new procedure aims for better performance. For RX, set audio device levels to 100%, disable AGC, and adjust RF gain. For TX, enable "Remember power settings" and adjust power output to avoid ALC engagement. This method ensures reliable communication without signal degradation, enhancing dynamic range and minimizing noise.
[ Hits: 49 | Votes: 0 | Rating: 0 ]

ICOM 756 and 756PRO - Ini this article the author compare the Icom 756 and Icom IC 756 PRO. Comparison is very detailed and includes S Meter Calibration, Microphone Gain, Transverter Jack, the noise blanked, the spectrum analyzer, audio quality, notch filter, compression meter, noise reduction, sensivity and filter settings along to many other features making this article a must for who want to compare this two models
[ Hits: 234 | Votes: 1 | Rating: 8 ]

FT-1000 Mark V and MD 200 - Fixing audio distortion with the Yaesu FT-1000 Mark V and Yaesu MD 200 microphones
[ Hits: 452 | Votes: 2 | Rating: 1 ]

FT-817 Audio Speech Compressor: Boosting Signal Power with SSM2165 - Designed for the FT-817, this audio speech compressor, centered on the Analog Devices SSM2165, offers a 40 dB compression range, enhancing signal power. Built externally with the SMD version to preserve warranty, the circuit interfaces smoothly with electret microphones. Testing shows a 6 dB average power increase. Adaptable to rigs with electret microphones, it maintains unity gain and 40 dB compression.
[ Hits: 60 | Votes: 0 | Rating: 0 ]
Yaesu FT-817 Audio Enhancement: Heathkit-inspired Homebrew Project - Inspired by Heathkit, author aimed to enhance his Yaesu FT-817 with audio and RF processing. Design goals included a compact enclosure, PCB simplicity, matching jacks, a visual meter, and a built-in signal generator. Despite challenges in finding a suitable compressor IC for a 5V DC mic jack, he chose the Analog Devices SSM2165/2166 series. Prototyping with a solderless breadboard, author planned a PCB layout for its versatile performance in communication use.
[ Hits: 80 | Votes: 1 | Rating: 2 ]

Yaesu FT857D Mic modification video - Yaesu FT857D No TX Audio, video on reparing and yaesu Mic modification, with audio improvements for SSB and FM
[ Hits: 1260 | Votes: 0 | Rating: 0 ]

Fix Baofeng UV5R+ Dead Audio - Fix the no-mic problem with the Baofeng UV5R+. It may happen the carrier wave is there, but there is no modulation.
[ Hits: 28 | Votes: 0 | Rating: 0 ]

MorseExpert for Android ^updated - Morse Code Decoder for Android based on the algorithms implemented in CW Skimmer. Morse Expert decodes Morse Code audio to text. It is optimized for decoding weak, fading signals in the presence of interference, especially on the Amateur Radio bands. The input audio might come either from the built-in microphone or from another device, such as a radio receiver.
[ Hits: 329 | Votes: 6 | Rating: 7.67 ]

Frequency Response Plotter - Draw static response time of an audio system. Originally intended for loudspeakers tests, is also a great tool for looking at microphone equalisation.
[ Hits: 976 | Votes: 4 | Rating: 9.25 ]

PI4ino - A Generic Arduino Beacon Controller - Generic PI4 + CW + Carrier Arduino Beacon Controller with interfacing to Analog Devices AD9833 DDS AD9850 DDS, AD9851 DDS, AD9912 DDS , AD9913 DDS, ADF4350 and ADF4351 synthesizers, ADF5355 synthesizer, ADF5356 synthesizer, Radio modulated by an audio soft-DDS Reverse DDS, RDDS microwave unit, Silicon Labs Si5351A programmable clock generator, Silicon Labs Si570 programmable XO/VCXO, Texas Instruments LMX2541 synthesizer
[ Hits: 1735 | Votes: 7 | Rating: 7.71 ]

Microphone sensivity calculators - Mic online calculator , Microphone Dynamic Range Calculator, Microphone Sensitivity Calculator
[ Hits: 418 | Votes: 4 | Rating: 3.75 ]
Flex Radio Power SDR Transmit Audio Settings - AB4BJ optimizing audio settings on the flex 5000A and heil microphones
[ Hits: 492 | Votes: 1 | Rating: 10 ]
An Audio Selection Panel in the Shack - On this page, you will find one of my designs; An Audio Selection Panel (ASP). The Audio Selection Panel allows you to control 4 Transceivers and hear the audio through the built-in loudspeaker and on an external boomset (combination Microphone/ headset). On or more transceivers can be selected at a time to transmit and/ or receiv
[ Hits: 138 | Votes: 2 | Rating: 7.5 ]

Headsets Reviews and Observations - A selection of speakers or headphones for use with amateur radio equipment. Includes an interesting paragraph comparing Dynamic and Electret Condenser Microphones, but also about audio Equalization.
[ Hits: 528 | Votes: 0 | Rating: 0 ]

Noisy Kenwood TM-D710A Microphone - A Kenwood TM-D710A microphone (Model MC-59) is producing crackling and intermittent, poor audio so John took a peak inside to have a look around.
[ Hits: 410 | Votes: 0 | Rating: 0 ]
Speech Processor - How to improve performance of your audio using a home made speech processor. In this article the author describes how to make your own speech processor providing a PCB foil pattern and with a 60mm x 60mm board.
[ Hits: 249 | Votes: 2 | Rating: 10 ]

AnyRig A Flexible Digital Mode Interface - This project uses an inexpensive Teensy microcontroller as the core of a flexible interface that provides a high-fidelity sound card and VOX functions for controlling the radio.The interface firmware supports variable VOX delay, CW and RTTY keying via audio (such as is available from Fldigi), and RTS and DTR control of any keying function, all via a single USB connection to the PC.
[ Hits: 142 | Votes: 0 | Rating: 0 ]

TYT MD-390 Rx Audio Issue - Common issue on the TYT MD-390 when the speaker start sounding like it is broken, but it depends by the external mic cover.
[ Hits: 172 | Votes: 1 | Rating: 10 ]