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2 Stack Match Yagi Antenna - Solves antenna matching problem with two phased antennas. Stacked rotary beams are popular. However, connecting two 50 Ohm antennas together presents some problems.

About baluns - General information about baluns, aspects of the balun problem

Baluns on Log Periodic Antennas - Some antenna manufacturers place baluns at the incorrect location in LPDA arrays, or tell you to route the cable incorrectly. This can cause substantial RFI and all sorts of weird problems like RF into house wiring.

Antenna Matching Coil Adjustment Procedure - Without this basic knowledge, addressing antenna problems, RFI problems, and matching problems, results in a frustrating situation. Procedure which must be followed to properly adjust a shunt matching coil.

Smith Chart Basics - Smith Chart it is a graphic tool for solving transmission lines problems

VSWR Reactive Power - Many antennas and antenna designers neglect the true cause of loss. The major problem using short antennas is the reactance, not the length

Tuning HF Coaxial Antenna Traps - The problem with making your own trapped HF antennas is usually getting the coaxial traps tuned to frequency.

K5THD - Club callsign for the Tulsa Health Department Amateur Radio Club

TNC troubleshooting - This article help on solving problems related to packet radio and TNC.

FL2100 Modifications and Repairs - Common problems and improper operations of Yaesu FL 2100 RF power amplifier

ICOM IC-746PRO Problems - The purpose of this web page is to try to investigate some of the issues around ICOM IC-746PRO reported by many radio amateurs through out the world; and unfortunately not properly taken care of by ICOM.

ICOM IC-746PRO Problems - The purpose of this web page is to try to investigate some of the issues around ICOM IC-746PRO reported by many radio amateurs through out the world; and unfortunately not properly taken care of by ICOM.

Kenwood TS-690 Modulation Mod - TS-690 50 MHz modulation problem solved

Repairing a Kenwood TS-940S - A page dedicated to fixing problems on the Kenwood TS-940S by G4URH

The FT-1000 slow display problem - A number of users have reported that their display takes 15 seconds or more to fully come on

FT-920 knwon problems - Cannot record CW message, AFSK not working, tracking not working, meter peak hold, on Yaesu FT-920.

Solving harmonic problems on UV3R - KA7OEI modification to LPF for the Baofeng UV3R

TM-241 Display problem - Kenwood TM-241 blank display problem

Tube-type amplifier FAQs. - This page should help the less experienced users solve common problems and questions about HF tube-type amplifiers by Matt Erickson KK5DR

Antenna Relay and distributor Box project - Have you problem with your RG cables ? This page describes a smart antenna box using an RG-cathode for 3 antennas. The remote control needs just a simple wire and the GND for remote-control

What cause key clicks - Clicks are most problematic when we try to copy weak signals next to moderately strong signals. How to recognize them, and how to identify clicks problems

Resolving 6 Meter Amateur Interference - Transmitting operations in the 50-54 MHz range offer some unique problems that over the past 50 years have stymied station owners, forcing them to tolerate quiet hours and hostility from family and neighbors attempting to enjoy other electronic services.

RFI (Radio Frequency Interference) - This page is meant to be a resource for hams interested in understanding and eliminating RFI problems.

Antenna RFI Problems - Antenna problems, eliminating RFI while in Cars mobile operations

Arcing or Gassy 572B Tube - Common problems of the 572B tubes often used in many RF Power Amplifiers