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If your doing any home brewing gear for ham radio its a great idea to have a dummy load. This will to your radio be the perfect antenna...it will never radiate but your radio sees a perfect 50 Ohm impedance.

A bowtie antenna is a type of antenna that reputedly provides higher gain at lower radiation angles than a center-fed dipole antenna at heights considerably less than 1/2 wavelength above ground.

A 50-ohm 10W resistor forms the core of this portable QRP antenna, designed by _K0EMT_ for convenient operation on 160m and 80m. The construction involves soldering the resistor to a BNC connector, with one lead to ground and the other to the center conductor, then insulating the assembly. This minimalist design aims to provide a highly portable solution for low-band QRP operations, acknowledging the inherent trade-offs between antenna size and efficiency. Testing with an antenna analyzer revealed low SWR on both 160m and 80m, with a Yaesu FT-817 confirming good matching. While 40m and 30m showed higher SWR, the primary focus remains on the lower bands. The author successfully tested the antenna with **2.5W CW** output, demonstrating its practical application for QRP field operations where ease of deployment is paramount, even if it means sacrificing some **gain** compared to full-sized antennas.

Eham IC-2100H review

Spanish ham radio shop with a complete amateur radio equipment offer

Homebrewing a mic boom headset for the Yaesu FT 897 and 857 transceivers

This program expedites the design of lumped-element diplexers using both the lowpass/highpass and the bandpass/bandstop topologies.

An active receiving antenna for 10 KHz to 20 MHz, a very small sized antenna with excellent performances in noise to signal ratio.

IC820H or other Icom Radios Soundcard interface for VHF EME use by DF9CY

Find the best placement of a mobile antenna

Develops and manufactures radios and telecommunication devices for special applications. SDR Receivers, Digital HF transmitters, Digital SSB Exciter.

Picture and specifications of the Yaesu FT-847

This homemade tube oscilloscope is based on the WaterMan Pocket-Scope 0510A, a 3 tube oscilloscope made in 1946.

A Low -Power Indoor Portable HF Antenna by Monty Northrup, by N5ESE

Picture and specifications for the Icom IC-9100

The Smith Chart was originally created many years ago as an RF engineering aid by Phillip Smith of RCA.These pages includes extesnive documentation on smith carts.

2,6 and 10 meters beacon located at Lake White, Ohio

Utility program to verify, merge, and sort standard 2-line orbital elements files

SM5BSZ article on building VHF RF amplifiers

A simple center-fed dipole made just with a thin-wall PVC pipe, aluminum tape, and RG-8X coax

The Peaberry SDR is the first and only do-it-yourself transceiver that doesn't require adding sound cards to your computer.

1:1 Ruthroff voltage balun using a T200-2 Toroid core

On-line Log search for 5U5R DX Pedition to Niger 2017

This document contains the detailed instructions to build a homemade lindenblad antenna using a twin-lead as dipole elements. This document contains 9 pages and includes a detailed construction sequence and some drawings to build this antenna for UHF and VHF ham radio bands

The KA7OEI FT-817 pages, customizing/accessorizing the FT-817

Homebrew a compact yagi antenna for 14 Mhz suitable for those with small plots based on a design by AB4GX

3d parts printed to build an EZ-Lindenblad 2 Meters LEO Sat antenna as designed from Anthony Monteiro

Raspberry Pi WebSDR Receiver Project running SoftRock Lite ii Receiver (40m) and Raspberry Pi Model B

A museum of thousands of telegraph keys, radios, microphones, enigma cipher machines, and scientific instruments.

The multiuser/multitasking BayCom Packet Terminal Driver program is a general purpose communications package for communicating with a BayCom modem attached to your IBM-PC/clone in conjunction with the TFPCX Baycom driver software. The software will also work with a normal TNC if it supports KISS mode, such as the Kantronics range.

YY5PER video of a Icom IC-7000 modified for TV reception

Arduino automatic CW Keyer for amateur radio

An extension of the excellent decoding software JT65 HF by Joe W6CQZ for amateur radio digital mode JT65

Garmin Kenwood Icom Vertex Alinco and more

QSL Cards from ALL 338 DXCC Entities, deleted countries QSL Cards, other interesting cards

Wood and plastic broadcast radios from the 1930s and 1940s, lovingly described and profusely illustrated.

Operating a specialized DX cluster, this service provides real-time DX spots exclusively from stations confirmed to be _Log of The World_ (LoTW) users. This unique filtering mechanism allows DXers to prioritize contacts with stations that are highly likely to upload their logs to LoTW, streamlining the process of achieving confirmed DXCC or other awards. The cluster aggregates data from various sources, presenting a focused view of active LoTW participants across multiple bands. By narrowing the scope to LoTW-active stations, the platform significantly reduces the effort required for QSL management, as users can confidently pursue contacts knowing a digital confirmation is probable. This targeted approach is particularly beneficial for contesters and DXpedition chasers aiming for rapid award qualification, offering a strategic advantage in identifying viable contacts. The service supports both web-based access and traditional telnet connections, ensuring broad compatibility for amateur radio operators. It processes thousands of spots daily, with a focus on delivering accurate and timely information relevant to LoTW users, facilitating more efficient and productive operating sessions.

Broadcasting your radio from your home using the SHOUTcast Radio DNAS Application

A folded dipole using twin lead By W8HDU

This is the table of contents to a list showing how the radio frequency spectrum is allocated to different users in the United States.

Digital Voice Transceiver Project This Project began to explore the use of the DVSI AMBE 2020 voice compression chip and also the ADF7021 single chip VHF RF Transceiver from Analog Devices.

Shure incorporated, microphones and audio electronics

A podcast devoted to long-distance radio reception on the AM broadcast band. AM, or Medium Wave (MW), signals can travel thousands of miles.

Need to interface both a TNC and the computer soundcard? This is a ICOM 756PRO ACC1 audio/keying/FSK interface by WA0SXV

This modification will allow the MkIIG to transmit on most of the frequencies that it receives on.

Interesting post with a practical video of using solar panel with a yaesu ft-857.

This article explain how to homebrew and use an HF antenna analyzer by simply adapting a Windows PC, micro-controller and a DDS evaluation board by K6BEZ

VoiceKeyDeluxe (VKD) will convert your sound card into a powerful and versatile digital voice keyer for contest or EME operations by N7QJP

2M Yagi made from Measuing Tape by NT1K

Manufacturer of single band and multiband transceiver bandpass filters for HF. High pass filters, two radoi headphones mix and switch, 6 meter portable antenna, antenna remote switching and steering.