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Keyclicks and NB modifications for the Yaesu FT-1000MP Mark-V HF transceiver

A different implementation of the G7FEK HF multiband antenna with some adjustments and modifications

Modification and verification of the FT847 to optimize 70 MHz performance by G4FUF

Tower erection service, modifications, replacement, repairing service

Freeband modification for the Yaesu FT-100

The intent of this article is to help the semi-non-technical person understand what is inside the Drake TR-7(A) Transceiver, how it works, and discusses simple adjustment and modifications the end-user can perform

Collection of modifications for the Heath HW-7

A collection of modifications for the Icom IC706 transceiver

The antenna in this project is a modification of the techniques used to design a multiband fan type dipole with little or no tuning involved having a total space of 105 feet

Atlantic Tower offer site maintenance, repair, modification, upgrade and installation services based in Orlando FL

Solving interference from television channel 11 on 144MHz transverters by Chris Cox, NØUK, G4JEC

FT1000D 250Hz Filter Modification

Adding a 20m band pass filter for the Icom IC-706MkII(G) by ON7EQ

Softrock Version 6.1 Software Defined Radio experience and modifications by DF9CY

Mods.dk modifications for the Kenwood TS-690

Drake Mods for R4B and R4C models by VE3EFJ

A simple Drake R-4C receiver power supply modification

With this mods you get more power, about 60W output on 4m from the Yaesu FT-847, mod by G4FUF

Mods for Kenwood TS-950SD / SDX

A kit Digital VFO with pre-soldered surface mount parts and burned-in firmware, a scratch build with Arduino Nano, C code with modifications, and a Silicon Labs si5351 PLL clock generator on a breakout board.

Articles about TM-D710 radio modifications at Mods.dk

Modifications to an Ameritron ALS 600 power amplifier by AF6SA

MARS modification instructions for the Yaesu FT-450D

MFJ-971 Portable Antenna Tuner Modifications adding a bypass switch and increasing inductance to tune on 1.8MHz

WA8MCQ modification for the Heathkit HW-7 transceiver

The Kenwood MC60A with preamp, suffers from RF feedback, a search on the web reveals the extent of the problem. This document explain how to fix this problem.

A modification of the UV3R Baofeng handheld transceiver to improve the built in low pass filter

Can Home Solar Power and Ham Radio Coexist? It is possible, with minimal interference from the solar power system, provided you make some modifications.

LA3ZA Unofficial Guide to Elecraft K2 Modifications

Diamond W8010 Multiband Dipole Modifications

Drake TR-7 A.M. Transmit Filter Modification

HM-36 Modification to make it work with an IC-7200 and the IC-7600

Resources for Kenwood TS-850SAT transceiver modifications, cables and tips

KA7OEI modification to LPF for the Baofeng UV3R

K2 Project by G3VGR, installation and modification

A Multiband Slinky Coil for the PAC-12 portable Antenna, can be used also as a dual PAC-12 dipole by James Bennett

How to use the hacked firmware on the MD-380. Tools for working with codeplugs and firmware of the Tytera MD380,

LA3ZA Unofficial Guide to Elecraft K2 Modifications

Modifications for Retevis RT3 / Tytera MD-380 includes Hardware Modifications, Codeplugs, Software / Firmware Modifications.

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.

These were some of the steps I took to setup my Allstar link node/server and some of the modifications that I did to it.

Although most Preselectors are designed with an internal T/R relay, theoretically enabling direct insertion between the transceiver and the antenna, there is a problem when running CW, especially when running full QSK. The switching time of the internal relay is too slow to follow full QSK. The best way to avoid this problem altogether is to insert the Preselector directly into the transceiver’s RX antenna line, thus avoiding entirely the need to switch the Preselector in and out.

A vertical antenna for 160 meters band based on the K6MM vertical with some enhancements and modifications on the main capacitance hat

Installation and modification of the popular Butternut HF9V antenna with the optional 160 meter addon. Article includes a modification to improve the performance on the top band

The Icom IC-7300 is a popular SDR transceiver known for its excellent performance in ham bands. However, users have reported issues with reception reliability outside these bands due to ADC aliasing. This phenomenon occurs when the sampling rate of the radio interacts with frequencies outside the intended range, leading to unwanted signals being received. For instance, when tuned between 30 to 36 MHz, users may inadvertently pick up WFM broadcast signals or PMR communications due to aliasing effects. This guide outlines modifications to improve the IC-7300's performance by addressing the low-pass filter design, which is crucial for reducing interference from these unwanted signals. The proposed modifications involve adjusting the low-pass filter on the PA unit to better attenuate frequencies that cause aliasing. Measurements indicate that the original filter design allows significant signal leakage, leading to false receptions. By implementing the suggested changes, users can achieve a notable reduction in unwanted signals, enhancing the overall functionality of the IC-7300. While the modification requires careful soldering, the benefits in performance make it a worthwhile endeavor for serious operators looking to optimize their SDR experience.

Despite the model limitations, such as a single TXRX antenna connector, the author shares a reversible modification involving a coax relay for enhanced functionality, demonstrating the transceiver's adaptability and customization potential.

Converts any HF Amplifier to QSK (full break-in) without amplifier modifications, Compatible with all HF transceivers supporting QSK

Modifying the Collins KWM-2 for Serious CW Operation, Make this old SSB workhorse perform like it should on CW.

Alpha 87A Amplifier Fault 1 and the downlevel amplifier

With this simple modification,it will be possible to keep the internal cooling fan on,running at reduced speed,when in receive mode.