roof

56 links

160-80-40 Metre Trapped V-Dipole - A Trapped dipole inverted V antenna for lower HF Bands. Construction details are for temporary installation. Permanent installations will require additional ruggedising and waterproofing however the basic electronics concepts remain the same. This project includes SWR plots for the three bands and pictures details of the homemade traps.
[ Hits: 109 | Votes: 0 | Rating: 0 ]

Build a Weatherproof PVC JPole Antenna - After you have build this antenna, you may not need anything else. This article shows how to build a VHF j-pole antenna and how to protect it by inserting it into a PVC tube, the correct way.
[ Hits: 808 | Votes: 2 | Rating: 8.5 ]

Magnetic Loop for 20 meters band - A magnetic loop antenna designed for 14 MHz. This kind of antennas is also known as STL, small transmitting loop and can be an excellent solution when you are not allowed to put antennas on your roof
[ Hits: 204 | Votes: 0 | Rating: 0 ]

Moxon Mania - Building the Ultimate 4-Band Moxon Antenna - The article details the design and construction of a four-band Moxon beam by a radio amateur. The beam, mounted atop a rooftop tower, aimed for gain over a dipole on 20 meters, cost under $500, and included additional bands. The design features fiberglass spreaders, four bands (20/15/10/6 meters), and a single feedpoint. The construction involved computer modeling, NEC source code, and specific dimensions. The article outlines the assembly, materials, and tuning process, including in-situ adjustments for optimal performance. Despite initial challenges, the beam improved signal strength and facilitated contacts on multiple bands, marking it as the best HF antenna the author has owned.
[ Hits: 96 | Votes: 0 | Rating: 0 ]

Eggbeater Mobile Antenna - The eggbeater antenna uses on mobile operations using the metal roof of the car as the reflector. The distance between the antenna and the roof as described in this article should be 1/8 lambda.
[ Hits: 127 | Votes: 0 | Rating: 0 ]

Groundplane Antennas at Various Heights - Mounting on roof at the right ground level can greately impact on antenna performances because will affect the radiated angle of energy.
[ Hits: 178 | Votes: 3 | Rating: 6 ]

G0HWC New Ham Shack - Pictures of the restructuring of the ham shack starting from an existing garage. Changes includes isolation of walls and roof and rebuilding of the radio table.
[ Hits: 401 | Votes: 4 | Rating: 9.25 ]

DK0TE KiwiSDR Germany - Online internet HF LW MF web receiver based in Baden-Wuerttemberg cooperative state university Ravensburg Campus Friedrichshafen running a T2FD antennan under roof.
[ Hits: 268 | Votes: 2 | Rating: 10 ]

Small Panel Kits - High performance, IPX7 waterproof small solar panels and battery packs to power radios, sensors, and other portable devices. Solar panels are UV and scratch resistant for long-term use in the field.
[ Hits: 331 | Votes: 0 | Rating: 0 ]

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 ]

FT2000 Roofing Filter Installation - A step by step guide to install the NS Roofing filter into the Yaesu FT-2000
[ Hits: 110 | Votes: 0 | Rating: 0 ]

Icom IC-R9500 - Icom IC-R9500 Professional Receiver with 5 roofing filters, 48 kHz DSP
[ Hits: 157 | Votes: 0 | Rating: 0 ]

ICOM IC-775 FIlter Installation - Inrad Roofing Filter installation instruction, The IC-775 Roofing Filter Mod consists of a 6 pole, 5 kHz wide filter followed by a high dynamic range, feedback amplifier.
[ Hits: 61 | Votes: 0 | Rating: 0 ]

Stingray Marine Transceiver - Recently, at the Ballarat Hamfest, the author acquired an old Marine transceiver for just $10, charmed by its sturdy construction and waterproofing. Made by Findlay Communications in Sydney, this crystal-controlled transceiver had been dormant but was reinvigorated with minor fixes. A manual was sourced, and further repairs were made, including an ingenious crystal oscillator replacement using an Si5351a controlled by an Arduino. The refurbished radio, complete with a fresh coat of paint and added customizations, is now operational for 160m AM and 30m SSB. A successful and cost-effective restoration.
[ Hits: 61 | Votes: 0 | Rating: 0 ]

RF-Quiet Solar PV for Ham Radio - This article discusses the potential for solar power systems to coexist harmoniously with amateur radio, challenging the notion that they are inherently incompatible. Drawing from personal experience, the author emphasizes the importance of selecting RF-quiet components, focusing on series-string Sunny Boy grid-tie inverters. The article also highlights considerations for system design and limitations based on roof orientation, shading, and array size. Overall, it presents a valuable perspective on creating a radio-friendly solar PV setup.
[ Hits: 78 | Votes: 1 | Rating: 1 ]

miniVNA PRO Modifications - The mini Radio Solutions miniVNA PRO is the only affordable vector network analyser (VNA) I know of that offers remote wireless operation. This is very interesting because it allows to measure the input impedance of HF antennas installed at height without having to deal with coax cable lengths, baluns nor common mode suppression chokes. However, to render the miniVNA PRO truly field proof, it requires a number of significant modifications.
[ Hits: 136 | Votes: 5 | Rating: 7.8 ]