short

467 links - and 11 categories

20m Coil-Shortened Dipole - Build a low-cost 20m shower rod dipole antenna
[ Hits: 104 | Votes: 0 | Rating: 0 ]

SAFARI 40-30m vertical Antenna - Roach pole vertical antenna for 40 and 30 meters band featuring good performance on short skips contacts compared to wire dipole
[ Hits: 310 | Votes: 0 | Rating: 0 ]
30m Half -Size Rotary Dipole - A rotary dipole antenna for 30 meters band. Each arm is about 12.5 ft and is constructed from telescoping fibreglass flag/fishing poles and short lengths of aluminium tubing. Two short lengths of glass-fibre rod were used to insulate the arms from the supporting hardware.
[ Hits: 198 | Votes: 0 | Rating: 0 ]
Shortened 30m Dipole - This article describes the construction of a 9,50 m long dipole for the 30 m band (10.1 MHz to 10.15 MHz). It was designed to be mounted ca. 6 m above ground inside an attic. The calculations were performed by OE1MEW
[ Hits: 124 | Votes: 1 | Rating: 1 ]

Shortened 40 meter Vertical for POTA SOTA - Build A Shortened 40 Meter Vertical antenna For POTA / SOTA Activations. A project for a portable wire antenna for 40 meters band suitable for POTA or SOTA operations.
[ Hits: 125 | Votes: 1 | Rating: 10 ]

Antenna too short! Inductivity matching with coil match. - Wire antenna calculator with inductivity matching coil where length shorter lambda/4
[ Hits: 132 | Votes: 0 | Rating: 0 ]

End-Fed Half-Wave Antenna for 20m 40m 80m - How to Design and Build a Field Expedient End-Fed Half-Wave Antenna for 20m, 40m and 80m. This Shorty 80m EFHW comprises a 49:1 autotransformer (to match the very high impedance at the end of a half-wave wire), a half-wavelength wire for 40m (also a quarter-wavelength for 80m), a loading coil and a short tail wire. The coil and the short tail wire (about 6 feet) make up the other quarter wave on 80m.
[ Hits: 141 | Votes: 1 | Rating: 4 ]

Short receiving loop antenna - This page is a project for a small loop antenna for reception of short wave broadcasting. It is in Portuguese and contains pictures and schematics to build your own antenna
[ Hits: 120 | Votes: 1 | Rating: 10 ]

Short Antenna for 40-30-20 Meters Band - This page describes an entirely simple, One-Knob matchbox that will match this antenna efficiently on 40, 30 and 20m, using a simple circuit that can be switched between series-resonant and parallel-resonant with just one banana jumper
[ Hits: 238 | Votes: 1 | Rating: 7 ]

Active 3-30 MHz Hula-Loop Antenna for Shortwave - This active antenna for the shortwave band provides surprising performance, even indoors. As the name implies, the main loop is made from a Hula-Hoop with the metallic paint stripped off and a single turn of 14AWG copper wire inserted inside the hoop.
[ Hits: 159 | Votes: 1 | Rating: 10 ]
Dual-Band X-Frame Shortwave RX Loop Antenna - A dual band X-frame wire antenna made using 4 turns for response down to 3 MHz or so, and 2 turns (switched) for response up to around 18 MHz. The loop configurations are tuned using common eBay 365 pF tuning caps.
[ Hits: 148 | Votes: 1 | Rating: 10 ]

Modified Ground Plane Antenna Adds Second Band - This article explains the trick of how to shorten and lengthen pairs of radials to make a 2-band ground plane antenna. Included is a "Table of Multi-Band Possibilities" covering the range of 6 to 40 meters.
[ Hits: 53 | Votes: 0 | Rating: 0 ]

Short introduction to D-STAR - On this page, you will find some basic information about D-Star, and some handy information for those in and around Essex UK
[ Hits: 54 | Votes: 0 | Rating: 0 ]

Yaesu FT-710 review - The Yaesu FT-710 is Yaesu s compact, shortwave transceiver that uses the SDR technology known from FT-DX101 and FT-DX10, which is a great fit for our fast-paced, comfortable world. The FT-710 is a perfect entry-level device. If you're thinking of buying a compact transceiver with SDR technology, it is a good choice.
[ Hits: 87 | Votes: 1 | Rating: 8 ]

CHU - CHU is a time signal transmitter operated by the National Research Council in Canada. It broadcasts on various frequencies and is primarily used for time synchronization in North America.
[ Hits: 42 | Votes: 0 | Rating: 0 ]

SWL contest MW and SWL - The goal of this SWL contest is to listen a maximum of countries on medium wave and shortwave (AM radios) The winners will receive nice gift from our sponsors.
[ Hits: 19 | Votes: 1 | Rating: 10 ]

SWLog - Shortwave and Amateur Radio Log (SWLog) is a modern suite of applications that provide logging and remote control for amateur radio and shortwave, utility, and broadcast listening. SWLog has been continuously improved and expanded since it was first released in 1988. SWLog is a suite of products that provides logging, radio control, GPS synchronization, QSL management, reporting, and propagation prediction. Program schedules from HFCC, ILGRadio, AOKI, ADDX, SWSkeds, EiBi, and others are leveraged for broadcast reception. Call sign lookups and remote logbooks are integrated with ClubLog, eQSL, QRZ, Ham365, HamQTH, and LoTW. SWLog provides Android and iOS applications for logging on the go as well as web servers for logging and remote control from anywhere. SWLog works on Windows, Linux, iOS and Android
[ Hits: 111 | Votes: 0 | Rating: 0 ]

How to Make an Automatic 12V Battery Charger - A home made battery charger 110-220 v AC providing from 1.25-24 v DC Adjustable at 8 Amps output power, with Short Circuit Protection Over Load and over charge Protection.
[ Hits: 154 | Votes: 0 | Rating: 0 ]

A Morse Code Practice Oscillator - Maybe not state-of-the-art technology but the author offers a quick and easy project for a Morse code practice oscillator using a 555 timer chip
[ Hits: 141 | Votes: 0 | Rating: 0 ]

Peaberry Software Defined Radio Transceiver - Construct the Peaberry, a SoftRock-compatible SDR transceiver. This project is aimed to build an amateur radio transceiver that operates on the medium or short wave bands
[ Hits: 152 | Votes: 0 | Rating: 0 ]