power mic

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power mic

55 links

Antennas : Tuners
  • Semi-automatic antenna tuner project - Thsi article describes a microcontroller driven semi-automatic antenna tuner capable of handling power levels up to 150 watts. The device is a low pass filter tuner manually tuned by setting the optimized L/C combination by hand and then storing the values into the EEPROM of the mictrocontroller to recall them later (seperately for each band from 80 to 10 meters including WARC bands)
    [ Hits: 289 | Votes: 0 | Rating: 0 ]
Manufacturers : Microwave
  • Kuhne Electronic - High quality microwaves components for professional and radioamateurs. Power Amplifiers, Low Noise Amplifiers, Es hail 2 Converter Transverter, Signal Sources, Passive Components and Accessoires
    [ Hits: 100 | Votes: 0 | Rating: 0 ]
Operating Aids : Beginner's Guides
  • Setting Up Your HF Station - From buying an amateur radio transceiver, choosing the correct power supply, selecting the antenna and its feed line, to choosing the best microphone and accessories. A nice presentation for beginners.
    [ Hits: 187 | Votes: 2 | Rating: 8.5 ]
Operating Aids : Grid Squares
  • Interactive Maidenhead Grid Square Locator Map  updated - Amateur Radio Ham Radio Maidenhead Grid Square Locator Map online. This map allow just a point and click to determine dynamically the correct six characters locator. Other functions allow to calculate the distances among two given locators, or coordinates. Hover over map, specify grid, or enter latitude and longitude to show grid and/or calculate distance. Map is powered by Bing Maps.
    [ Hits: 2553 | Votes: 7 | Rating: 8 ]
Operating Modes : VHF UHF
  • 40 MHz 8m Band Amateur Radio Exploration - The 8m ISM band, a unique frequency range between 10m and 6m, holds potential for amateur radio enthusiasts, yet it remains largely unallocated. This spectrum offers fertile ground for research and self-training. The author's experience with low-power transmissions and WSPR testing highlights the band's capabilities and the need for a narrow, speech-free amateur allocation to encourage experimentation. Discover the world of 8m ISM radio exploration and its future possibilities.
    [ Hits: 70 | Votes: 1 | Rating: 8 ]
Radio Equipment : HF Amplifiers : Icom PW-1
  • Using the PW-1 safely - An article by MicroHam on using the Icom PW-1 RF Power Amplifier safely and with non-Icom transceivers.
    [ Hits: 218 | Votes: 1 | Rating: 1 ]
Radio Equipment : HF Transceivers Radio Equipment : HF Transceivers : Icom IC-705
  • IC705 GoBox: A Portable Windows-Based Solution for All-Digital Modes - This project details the creation of a portable GoBox housing an IC705, Windows 11 PC, and Bluetooth microphone. The robust setup, enclosed in a weatherproof Hofbauer Explorer Case, ensures stability and functionality for QRP and emergency radio activities. The aluminum-mounted devices minimize RF interference, and a built-in LifePO4 battery powers the 10.1 TFT touch LED monitor, providing approximately 12 hours of use in receive mode. With a focus on grab-and-go versatility, this GoBox stands as an efficient solution for outdoor ham radio operations.
    [ Hits: 88 | Votes: 0 | Rating: 0 ]
Radio Equipment : HF Transceivers : Yaesu FT-817
  • 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: 57 | Votes: 0 | Rating: 0 ]
Software : Android
  • Robot36 SSTV Decoder for Android - Receive and decode SSTV amateur radio SSTV signals with this small and powerfull SSTV decoder app for Android devices. Requires access to microphone.
    [ Hits: 258 | Votes: 1 | Rating: 10 ]
Technical Reference : AI Ham Radio
  • AI Projections for Ham Radio Modes in 2023-2025 - In an innovative analysis, Michael G7VJR employs NeuralProphet to predict ham radio modes' usage trends. The AI model, leveraging deep learning, forecasts a steady FT8 dominance, with slight declines in CW and Phone activities. This approach simplifies statistical predictions, showcasing the power of AI in understanding complex patterns and facilitating insightful time series projections. Access the freely available Club Log data for continuous exploration.
    [ Hits: 40 | Votes: 0 | Rating: 0 ]
Technical Reference : Coax Cables and Connectors
  • Coax Cable Attenuation and Power Handling Online Calculator - An on-line coaxial cable attenuation and total power handling calculator, with a lot of cable properties already configured to give the Nominal Attenuation, Maximum Cable Assembly Insertion Loss, Average Power, Cable Vg anf Nominal Td
    [ Hits: 226 | Votes: 2 | Rating: 2 ]
Technical Reference : Electronics
  • A Brief Treatise on the Decibel - An article on origin and usage of the Decibel, that has always been a logarithmically based representation of a power ratio
    [ Hits: 278 | Votes: 0 | Rating: 0 ]
Technical Reference : QRP Projects
  • The Micro20 III Pocket Size SSB RTX for 20m - DK7IH QRP transceiver for 14 MHz. This small and compact home made transceiver with a max power output of 5W, the VFO module is based on the clock oscillator chip Si5351A by Silicon Labs ATmega168 and OLED 1306
    [ Hits: 249 | Votes: 3 | Rating: 10 ]
Technical Reference : Transverters
  • 70cm Mini Transverter - A low cost, low power microwave transverter so that you can operate easily on 70cm band even with a HF or VHF transceiver
    [ Hits: 388 | Votes: 0 | Rating: 0 ]

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