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208 links - and 3 categories

UniBalun: Lightweight Balun/UnUn PCB for QRP Radios (1:1, 1:4, 1:49) - The UniBalun is a PCB for building a lightweight antenna transformer (Balun) or impedance converter (UnUn) for low power radios. By soldering jumpers and a toroid core, you can create a 1:1, 1:4 Balun or 1:49, 1:9 UnUn. The latest revision (1.2) includes improved pads and supports both BNC and SMA connectors. Build instructions are available for German speakers.
[ Hits: 62 | Votes: 1 | Rating: 1 ]

A Simple 2 Element Quad Antenna for 10 meters - Quads beams consist of 2 1 wavelength (approximately) loops, ordinarily arranged so that one is the driven element and the other is the reflector. In this project author explains how to build a two element Quad Antenna for the 28 MHz.
[ Hits: 273 | Votes: 1 | Rating: 7 ]

VHF UHF BiQuad - This is a vertically polarized Broadside and Collinear Array each Loop is a vertically polarized Broadside Array both the right and the left side of the Loop is a bent 1/2 wave dipole working 180 degrees out of phase with the other one and that gives you 4.15dbi of gain
[ Hits: 176 | Votes: 0 | Rating: 0 ]

Cb Radio Ads - For sale used unwanted HAM and CB Radios for sale in your area. Post your unwanted radio items to others for free.
[ Hits: 6 | Votes: 4 | Rating: 10 ]

Universal PC Headset Interface - This is a simple interface that will let you use your pc-multimedia headset on your ham rig. It’s a small plastic box with two sockets for the headset jacks.
[ Hits: 141 | Votes: 1 | Rating: 10 ]
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: 186 | Votes: 0 | Rating: 0 ]

Adapting Standard Headset Mic for Yaesu FT-8900 - Explore the process of creating a custom adapter for the Yaesu FT-8900 radio with a non-standard mic port. The article guides users through understanding the reversed pin-out of the RJ-12 connector on the 8900, providing a detailed circuit for adapting the voltage for electret-based mics. With a list of required parts and construction tips, this DIY project ensures seamless compatibility with standard electric headset mics.
[ Hits: 45 | Votes: 1 | Rating: 1 ]

Remote Power and SWR Meter Project - Remotely monitor the output power and SWR of your station via a web browser. WT32/ESP32 based project, combined with a directional coupler setup. It reads two voltages which are supplied by the directional couplers. From these, the respective power is calculated with the help of a calibration data table to be created by the user.
[ Hits: 102 | Votes: 0 | Rating: 0 ]