- 12V powered Audio Amplifier
- A 12V powered, 4x15 Watt quad audio amplifier
[ Hits: 387 | Votes: 0 | Rating: 0 ]
- 12W amplifier
- ON6MU 12 Watt amplifier schematic
[ Hits: 543 | Votes: 2 | Rating: 8.5 ]
- A fool-proof VOX
- A circuit which had been used in many other application before. The configuration described here is optimized for IPHONE/radio operation.
[ Hits: 1473 | Votes: 0 | Rating: 0 ]
- A Potpourri of Audio Amplifiers
- A collection of audio amplifier projects by N1HFX
[ Hits: 583 | Votes: 0 | Rating: 0 ]
- A switched Capacitor Audio Filter
- Here is a rather nice audio filter for use with Ham Radio gear. It features switchable operation as a -32 dB per octave low pass or notch filter having a 200Hz-2500Hz tunable cutoff frequency, buffered input and output, switch selectable filter bypass function, and good stability. T
[ Hits: 67 | Votes: 0 | Rating: 0 ]
- 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: 135 | Votes: 2 | Rating: 7.5 ]
- Analyzing SSB Signal Quality in CQ WW Contest
- This article investigates SSB signal quality during the CQ WW 2015 SSB contest. It highlights the importance of adhering to the ideal SSB signal profile, the impacts of intermodulation distortion, and the consequences of poor-quality signals. The analysis underscores the need for well-tuned equipment to ensure cleaner, more efficient signals and, consequently, a more enjoyable and spacious experience for contest participants and amateur radio operators.
[ Hits: 24 | Votes: 0 | Rating: 0 ]
- Audio Cables
- Article with answers to common questions as what cable types to user, cable length, how to join ends.
[ Hits: 265 | Votes: 0 | Rating: 0 ]
- Audio Compressor for SSB
- Build an audio Processor and clipper optimised for SSB transmitter
[ Hits: 1448 | Votes: 1 | Rating: 1 ]
- Audio CW Filter
- A very effective AF Adaptor, with built-in noise blanker and 30 Hz CW filter modules by PA0LQ
[ Hits: 1506 | Votes: 3 | Rating: 5.67 ]
- Audio filters and speakers
- Review of common audio speakers for mobile setups
[ Hits: 532 | Votes: 0 | Rating: 0 ]
- Audio Mixer
- An homebrew audio mixer for the ham shack by GW6ITJ
[ Hits: 746 | Votes: 2 | Rating: 2 ]
- Audio Preamp
- Easy circuit that provide good gain to weak audio signals
[ Hits: 3811 | Votes: 2 | Rating: 3.5 ]
- Audio processor for SSB transceiver
- This circuit consists of microphone amplifier and a high pass filter. Suitable to improve signal readability.
[ Hits: 1444 | Votes: 1 | Rating: 1 ]
- Audio spectrum analyzer
pop
- Analyzes audio from 10 Hz to 20 kHz, input from microphone or wave file, Variable sample rates (8000 Hz, 11025 Hz, 22050 Hz, 44100 Hz)
Variable transform sizes (1k, 2k, 4k, 8k)
Upper and lower limits adjustable
Continuous, averaged, peak hold
[ Hits: 30248 | Votes: 54 | Rating: 3.82 ]
- Audio Spectrum Analyzer - OscilloMeter
pop
- Audio Spectrum Analyzer for Real-time, FFT, OscilloScope, Frequency counter, voltmeter, noise and distortion meter, phase shift meter. Multi-Tone Sound Frequency Sweep Generator. White, pink noise.
[ Hits: 89691 | Votes: 327 | Rating: 6.19 ]
- Automated Voice announcements over RF
- Automated voice announcements project built to have an automated way to deliver club announcements via the repeater network.
[ Hits: 60 | Votes: 1 | Rating: 10 ]
- Bass EQ Pre Amp
- A Bass Eq Pre amplifier for high impedance PU by ON6MU
[ Hits: 444 | Votes: 0 | Rating: 0 ]
- Bluetooth Audio and Amateur Radio
- Bluetooth headsets are very common with cell phone users. As such, many amateurs may already own a Bluetooth (BT) headset. So why not use it with amateur radio?
[ Hits: 4236 | Votes: 10 | Rating: 6.6 ]
- Build An Audio Speech Processor
- When one operates at low power on SSB, speech processing becomes almost essential to get through the QRM. The circuit is a low cost speech processor that will perform well with a minimum of construction effort.
[ Hits: 4080 | Votes: 13 | Rating: 7.3 ]
- Communication Speakers
- Have you searched and searched for a good speaker for your ham radio? That perfect speaker that would let you hear voices through the noise and static without hiss?
[ Hits: 547 | Votes: 3 | Rating: 5.67 ]
- Design Guidelines for JFET Audio Preamplifier Circuits
- Design Guidelines for JFET Audio Preamplifier Circuits By Mike Martell
N1HFX
[ Hits: 640 | Votes: 4 | Rating: 1 ]
- Designing Op Amp Audio PreAmplifiers
- Design guidelines for Op Amp audio preamplifier circuits by Mike Martell N1HFX
[ Hits: 1638 | Votes: 4 | Rating: 3.25 ]
- DIY Ham Radio Loudspeaker
- An interesting article on how build an optimal sounding communications loudspeaker capable to optimize sound reproduction at the frequency range from 150 Hz to 3 kHz.
[ Hits: 494 | Votes: 0 | Rating: 0 ]
- DSP Speaker project
- Build this noise reducing system to enhance audio of your speaker. A project by kg4jjh
[ Hits: 586 | Votes: 0 | Rating: 0 ]
- External Audio Equalizers
- An excellent guide on choosing external audio equalizers by K3DAV
[ Hits: 374 | Votes: 0 | Rating: 0 ]
- Flex Radio Power SDR Transmit Audio Settings
- AB4BJ optimizing audio settings on the flex 5000A and heil microphones
[ Hits: 487 | Votes: 1 | Rating: 10 ]
- FT-726 AUDIO Modifications
- Throughput improvement for the FT726R - Tapr PSK modem
[ Hits: 808 | Votes: 0 | Rating: 0 ]
- FT-817 Audio Speech Compressor: Boosting Signal Power with SSM2165
new
- 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: 31 | Votes: 0 | Rating: 0 ]
- FT-897D Audio processing and ALC operation
- Audio processing and ALC in the FT-897D
[ Hits: 2657 | Votes: 4 | Rating: 3 ]
- Heil Microphones DSP Settings
- How adjust DSP settings for your trasmitter when using Heil Sound microphones
[ Hits: 515 | Votes: 1 | Rating: 1 ]
- Hi-FI Audio with Yaesu FT-2000
- Setup for the Yaesu FT-2000 by John K3UR
[ Hits: 1827 | Votes: 0 | Rating: 0 ]
- Icom DSP Settings and Pin Connections
- ICOM audio DSP settings and pin connections for heil sound headphones
[ Hits: 733 | Votes: 1 | Rating: 1 ]
- Improving the audio on the ICOM IC-27
- Make an otherwise fine radio even better, change one resistor and one capacitor in the audio section
[ Hits: 36 | Votes: 0 | Rating: 0 ]
- Improving transmission Intellegibility
- Improving the intelligibility of an SSB transmissions
What is important when processing speech. Which bands have more impact on speach ?
[ Hits: 542 | Votes: 1 | Rating: 6 ]
- Integrated Circuit Audio Amplifiers
- Circuit designs for IC audio amplifiers by N1HFX
[ Hits: 419 | Votes: 0 | Rating: 0 ]
- JRC NVA-88 Modification
- Adding 2 RCA inputs, 1 high impedance filtered audio output RCA 3, 3 HIGH PASS filters, 3 LOW PAS filters to the JRC NVA88 Speaker
[ Hits: 46 | Votes: 0 | Rating: 0 ]
- Kenwood DSP Settings and pin connections
- Kenwood radios audio DSP settings for Heil Sound headphones
[ Hits: 675 | Votes: 2 | Rating: 2.5 ]
- Low Pass Audio Filter
- 440 Hertz peaked low pass audio filter experiments
[ Hits: 915 | Votes: 1 | Rating: 7 ]
- Low Power LF Amplifier
- ON6MU Low Power amplifier
[ Hits: 846 | Votes: 0 | Rating: 0 ]
- Mic Pre Ampllifier
- A microphone preamplifier schematic for hand-helds by ON6MU
[ Hits: 1662 | Votes: 2 | Rating: 4 ]
- Microphone sensivity calculators
- Mic online calculator , Microphone Dynamic Range Calculator, Microphone Sensitivity Calculator
[ Hits: 415 | Votes: 3 | Rating: 4.67 ]
- N2RIT audio chain
- Audio setup at N2RIT built around the Yaesu FT-950 abd the Heil Sound PR-781 an ultraflex PRO EX3200
[ Hits: 636 | Votes: 0 | Rating: 0 ]
- No More Splatter
- Improving your own signal quality by GM3SEK
[ Hits: 493 | Votes: 0 | Rating: 0 ]
- RF Speech Processor
- RF Speech Processor project with complete schematic by Jagodic YU1OXB
[ Hits: 838 | Votes: 2 | Rating: 9.5 ]
- Setting Up A Record and Playback System
- Sending the Audio from the Receiver to the Recorder, from the Recorder to the EQ, and sending the Audio from the EQ or Recorder to the Transmitter
[ Hits: 286 | Votes: 0 | Rating: 0 ]
- Soundcard Audio Tools and Toys
- Soundcard audio tools and toys, experimental ideas and utilities.
Signal Generator, Frequency-counter / instrument-tuner, Real-time Spectrum Analyser
[ Hits: 14581 | Votes: 16 | Rating: 7.75 ]
- Speaker placement
- Guidelines for optimal speaker placement inside our ham radio shacks
[ Hits: 615 | Votes: 0 | Rating: 0 ]
- Speech Intelligibility
- Articles published by the Radio Society of Great Britain, basic principles, construction of a simple equaliser circuit
[ Hits: 439 | Votes: 1 | Rating: 10 ]
- Transistor Audio Preamplifier Circuits
- Design Guidelines for Bipolar Transistor Audio Preamplifier Circuits By Mike Martell N1HFX
[ Hits: 1810 | Votes: 3 | Rating: 4.33 ]
- Transmit Audio Settings on the Kenwood TS-990
- Optimizing audio settings on the Kenwood TS-990 by AB4BJ
[ Hits: 722 | Votes: 1 | Rating: 1 ]
- Yaesu DSP Settings and Pin Connections
- Yaesu DSP audio settings for Heil Sound headphones
[ Hits: 643 | Votes: 0 | Rating: 0 ]
- Yaesu FT-1000D HiFi SSB Audio and Mods
- Using Hi-Fi Audio with FT-1000. Includes many FT-1000D modifications too by K6JRF
[ Hits: 4798 | Votes: 9 | Rating: 5.44 ]
- Yaesu FT-817 Audio Enhancement: Heathkit-inspired Homebrew Project
new
- 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: 53 | Votes: 1 | Rating: 2 ]
