2 cable

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2 element Yagi for 20 meter - This antenna was designed for the CQ WW CW 2009 at EA8URL. All elements are made out of fishing rods with an insulated copper cable fixed on the rods by cable ties. Both fishing rods and cable are UV resistant.
[ Hits: 634 | Votes: 2 | Rating: 5 ]

50 MHz CLC antenna - A small antenna for 50 MHz made with copper cable loading coils
[ Hits: 249 | Votes: 0 | Rating: 0 ]

J-Pole Antenna for 50 MHz - This J-Pole is mounted on a fishing rod. The radiator L1 is an isolated copper-wire with a length of 281,5 cm while the quarter-wave matching sector L2 is made with 450-Ohm-Wireman-cable
[ Hits: 223 | Votes: 0 | Rating: 0 ]

Build your own HF balun - A balun is a MUST for dipoles or similar antennas when they are feed with coaxial cable. From the RF point of view, the shield can be modeled as two conductors, the internal shield (the real shield, this is, ground) and the external shield, who is really far to be ground. In this way, your dipole has 3 arms, the two from the dipole and the coaxial cable shield (external face)
[ Hits: 248 | Votes: 1 | Rating: 10 ]
BalUn for Delta-loop & Quad-loop antennas - This Guide helps you to build the 1:2 BalUn 600 Watts DIY kit step by step. If a delta-loop or quad-loop antenna is powered with a coax cable from the transceiver it is necessary to use a 1:2 BalUn. This 1:2 BalUn uses a symmetrical 1:2 impedance transformer.
[ Hits: 286 | Votes: 1 | Rating: 9 ]

Cobweb Antenna - A home made cobweb antenna project made with easy to find parts 2-14 AWG speaker cables which are cut to 1/2 wavelength for each band and junction box with 4:1 Balun
[ Hits: 265 | Votes: 4 | Rating: 10 ]

High Performance common-mode chokes - May 2015 Radcom Article on common-mode chokes that can be used for control cables, phone lines, but mostly on typical HF antenna systems. This article explain what common mode chokes does, why you meay need one, properties common mode chokes should have, how to build and measure performances.
[ Hits: 687 | Votes: 1 | Rating: 10 ]
RF Choke with Bifilar Windings - This article presents an RF Choke featuring an 11-bifilar turn winding of #14 house wire on a Fair-rite FT240-31 toroid. The choke is enclosed in a 3D-printed case from Thingiverse, though this may pose thermal concerns at higher power levels. With SWR concerns up to 30MHz, the author plans to employ two series chokes at the rig input for improved performance. This choke offers versatility for portable use, with potential mismatch resolution using an antenna tuner. Further testing is anticipated upon the arrival of new cables.
[ Hits: 86 | Votes: 0 | Rating: 0 ]

Magnetic Loop HF antenna - An homebrew HF Magnetic loop made with 2m length of 6mm diameter copper pipe formed into a near circle as the low loss inductor, a short length of coax as a capacitor,a short length of mains cable, again as a fixed tuned capacitor, a tunable 365pF air spaced capacitor, and a small Jackson C804 airspaced variable with a small 3-35pF trimmer in parallel
[ Hits: 131 | Votes: 0 | Rating: 0 ]

Aluminium Push Up Mast - A DIY aluminium push up mast project. The final mast includes 7 aluminium tubes with 6 cable clamps
[ Hits: 357 | Votes: 3 | Rating: 6.67 ]

FBK 2m-70cm dualband coax antenna - A travel, or a fixed vertical coax antenna originally designed by PA0FBK. This antenna is very easy to make from a piece of 50 ohm or 75 ohm coaxial cable, and can be either smooth, roll-up version, or rigid cable
[ Hits: 354 | Votes: 3 | Rating: 9.33 ]

20-30m Vertical Antenna - Homebrew project for a vertical antenna with a coaxial-cable trap, that works on 20 and 30 meters band.
[ Hits: 73 | Votes: 0 | Rating: 0 ]

Reducing the Cable Mess - Optimizing the cable connections for cat control and audio input output by implementing the digirig mobile. A small audio and rig control interface, with a single USB cable supports most QRP radios requiring external audio and CAT control facilities
[ Hits: 155 | Votes: 0 | Rating: 0 ]

Baofeng UV-5 Programming Cable - Baofeng UV-5R uses RS232 to communicate or programming with the PC software and you can make your own programming cable with a few components.
[ Hits: 439 | Votes: 2 | Rating: 7.5 ]

N-Type Connector on Cellflex Cable - Installation of Female N-Type Connector on 1-5/8 RFS Cellflex Cable
[ Hits: 96 | Votes: 2 | Rating: 6.5 ]

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 ]

Programming KG-UV3D and UV-5R - Programming the Wouxun KG-UV3D and the Baofeng UV-5R+, getting your computer to recognize the programming cable, installing the Wouxun software and hints on how to program Baofeng radio UV-5R.
[ Hits: 79 | Votes: 0 | Rating: 0 ]
A Universal Programming Cable for Radios - The programming cable is intended to be used with a computer RS-232 port for programming radios and other devices. The main goal of this cable schematics is inverting signal levels.
[ Hits: 89 | Votes: 0 | Rating: 0 ]

Common-mode chokes Measurements - Common-mode chokes are useful solutions for RFI reduction. Winding a few turns of coaxial cable on the FT 240-31 toroid can reduced the noise below the received noise floor. In this article author measure different chokes
[ Hits: 156 | Votes: 1 | Rating: 8 ]