micro

443 links - and 14 categories

Microvert antenna calculator - Online antenna calculator for the microvert capacitive antenna
[ Hits: 124 | Votes: 2 | Rating: 8 ]

Microvert Antenna for 40m by ON7IR - A mircovert antenna assembled for the 40m version of the DL7PE antenna. A one meter long aluminum tube with 24mm diameter is used for the base (element 1) and a 50cm aluminum tube with 20mm diameter for element 2 (the extention). A pvc pipe, 34cm long and with a diameter of 38mm, is used to wind the coil on (1mm enamelled copper wire).
[ Hits: 152 | Votes: 0 | Rating: 0 ]

What is Horn Antenna - Horn Antenna - The energy of the beam when slowly transform into radiation, the losses are reduced and the focussing of the beam improves. A Horn antenna may be considered as a flared out wave guide, by which the directivity is improved and the diffraction is reduced. One of the first horn antennas was constructed in 1897 by Bengali-Indian radio researcher Jagadish Chandra Bose in his pioneering experiments with microwaves. The modern horn antenna was invented independently in 1938 by Wilmer Barrow and G. C. Southworth. This Horn model antenna is suitable employed in the UHF or SHF radio bands. Making this horn model antenna it will be easy for a beginner to make if it works in the 10GHz frequency, because small dimensions so it is not so difficult and also offers gain up to 25dBi.
[ Hits: 74 | Votes: 0 | Rating: 0 ]

Double BiQuad Antenna for 2.6 GHz - This is basic instructions for homemade 4G Antenna working on 2600 MHz UMTS featuring 13 14 dBi gain. This antenna is desigend to resonate on microwave frequencies in two segments from 2500 to 2570 MHz for Uplink, and from 2620 to 2690 MHz for Downlink.
[ Hits: 85 | Votes: 0 | Rating: 0 ]

KD5RVX MicroVert Antenna - A Microvert antenna by KD5RVX based on the original microvert concept by DL7PE. PDF includes a 20 foot portable PVC tower project
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V6 DXpedition Micronesia - 2023 September DXPedition Chuuk, F.S.M QRV on September 18-21, 2023 from Weno Island, Chuuk, Federated States of Micronesia. On 160-6m, CW/SSB/RTTY/FM (29MHz)/FT8. V6Z, V63Z, V6AAA, V6WW, V6C, V63FM, V63OS,V63VB,V63SX
[ Hits: 24 | Votes: 0 | Rating: 0 ]

KC9ON CW Morse Products - CW Morse Nano QRP and Micro Keys. CW Morse PCB Keys. Morse Keyers
[ Hits: 108 | Votes: 0 | Rating: 0 ]

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: 189 | Votes: 2 | Rating: 8.5 ]

Aircraft Scatter ACS - Getting started with Aircraft scatter, defined as the process of scatter radio waves of the body of a traveling aircraft in order to enhance the distance possible to bridge on VHF, UHF and microwaves. The ACS path, Equipment requirement and Operating techniques
[ Hits: 55 | Votes: 0 | Rating: 0 ]

QO-100 with LimeSDR - QO-100 Communications with the LimeSDR Family. LimeSDR can transmit in the expected uplink frequency for QO-100 – which is 2.4GHz – and has a nice reference onboard that makes it relatively stable in frequency aspects
[ Hits: 77 | Votes: 0 | Rating: 0 ]

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: 74 | Votes: 1 | Rating: 8 ]

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: 96 | Votes: 0 | Rating: 0 ]

IC706 MKIIg Mic Interface - This interface is perfect to operate the ICOM IC706 MKIIg with a pc-headset,in VOX or with PTT.
[ Hits: 84 | Votes: 0 | Rating: 0 ]

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 ]

MFJ-434 Voice Keyer - Let this microprocessor controlled MFJ Contest Voice KeyerTM call CQ, send your call and do contest exchanges for you in your own natural voice
[ Hits: 57 | Votes: 0 | Rating: 0 ]

SNASharp - SNASharp is a free software application designed to work with scalar network analyzers compatible with NWT software from DL4JAL. It is used to measure and analyze the scattering parameters (S-parameters) of microwave devices. Provide several measurements and analysis tools including Smith chart, Polar plot, S-parameter tables, Transmission line calculator
[ Hits: 69 | Votes: 0 | Rating: 0 ]

OTRSP Antenna Selector - Open Two Radio Switching Protocol Antenna Selector on ATMEL ATmega8 microcontroller
[ Hits: 92 | Votes: 0 | Rating: 0 ]

Yaesu FT-891 Go-Box for POTA - This article documents the author's latest go-box build for outdoor ham radio operations using a Yaesu FT-891 transceiver. The go-box is constructed from a plastic "50-cal ammo case" and contains various components, including the transceiver, LDG Z11 Pro autotuner, DIY Yaesu FH-2 remote control keypad, and an external battery. The author details the design considerations, the mounting of components inside the box, and addresses issues related to ventilation and cable management. The go-box is geared for CW operations and POTA activations, with further modifications planned for a microphone and DATA jack. This project allows for rugged, environmentally protected outdoor radio operations while maintaining portability.
[ Hits: 196 | Votes: 0 | Rating: 0 ]

Computer headset adapted for Ham Radio Usage - Adapting a common PC earphone with microphone to connect to a transceiver via a homemade pre-amplifier, using a simple chip with aprox 10 db gain. Includes a schematic diagram
[ Hits: 188 | Votes: 0 | Rating: 0 ]

Astatic Mic Wiring Handbook - Complete microphone wiring handbook for most popular radio transceivers provided by Astatic Microphones.
[ Hits: 185 | Votes: 1 | Rating: 10 ]