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VHF UHF diplexer by G8MNY -
Service manual in PDF Format for the Yaesu FT-7800 transceiver -
A solutiom for the Ameritron AL-811(H) RF power amplifier, burnt panel meter lights. A common failure with the Ameritron AL-811 and similar amplifiers is that the panel meter lights burn out prematurely. These bulbs are usually integrated into the actual panel meter. The solution for this is to provide the meter backlighting with LEDs. -
Part 2 You're now much closer to saying goodbye to your unwanted signal problems! -
A compact antenna for 160 meters, suitable for hams tha want operate top band buh have a limited space -
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A Useful Horizontally Polarised Omni-directional Antenna with Gain for 144 MHz -
A PDF presentation about Amateur Radio and Linux by By: Dave Mamanakis. A beginners guide to Linux for radio amateurs, this presentation cover basic concepts of the open source operative system, from the basic installation to the setup of ham radio programs. -
An home made vertical dipole antenna made with simple material. The antenna has a total length of aproximately 16 feet. In this article appeared on June QST 2019, the author explain how he reached the optimal confirugation changing and adjusting the lower part of the antenna, trimming and spacing correctly the copper wire. PDF File to downloas -
G3XBM's Amateur Radio Page - with QRP, VLF and crystal set links -
This interface is intended to be used with all the popular digital modes like PSK31, RTTY, Olivia, etc., which modulate a continuous carrier. -
A scanned PDF of this interesting book on HF Dipole antennas published by Stanford Research Institute -
Schematic of Yaesu FT-857 main board original jumpers based on different radio type -
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Optimizing performances of the end-fed antennas QRP quarterly article -
In this article K3DAV show a very simple way to make an RF choke coil that will remove your RF feedback troubles -
Packet Radio networking home page with lots of informations and tech. resources -
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An excellently presented article on the design and construction of a medium wave DX Antenna -
Optimization tests of the W3EDP multi-band HF wire antenna a popular aerial among QRP enthusiasts because it is light weight and cheap. -
A complete guide to magnetic loop antenna construction, with analysis of multi-turn and single-turn magneti loops, and and insight on choosing the optimal capacitor, or homebrewing your own butterfly capacitor -
There are 2 possible TX extensions on the E version, either full TX (1.705 - 30 MHz) or just open up 5 MHz (cut the R968 jumper and make it into a K version). This mod has been tested on TS 590S and not on TS 590SG -
A Variable Base-Loading-Coil for use under a HF Mobile Whip -
An optimized variant of the venerable G5RV multiband antenna -
A multi-band portable vertical antenna can be built with relatively ordinary components obtained from the local hardware store, including replaceable loading coils -
Experiments with spiral dipole antennas. Includes two spiral antenna designs for 20 and 40 meters band by KN9B -
Intended for portable long-term usage and also good for Field Day Events article by By Steve KB1DIG & Kim KB1GTR -
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Yaesu FT-2000 Panadapter, using the Softrock 9 Lite, SDR receiver kit -
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The skeleton slot antenna design was developed in the UK for TV use soon after WW2. This document describe and adapted version for the 2 meter band -
This article is designed to be an introduction to the terms and basic mechanics of propagation methods that are to be found on the HF and VHF bands. -
This is an experimental CW transceiver for 80m, although the same idea will work on all HF bands -
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The ZS6BKW antenna evolved from an optimization of the G5RV antenna. The SWR on 80m is too high and the 40 ft ladder line matching section is a little too long on 17m and a little too short on 10m -
A two meter Quad antenna project with detailed instructions on how to adjust the Quad gamma match -
A magnetic loop antenna working from 30 to 15 meters with 100W -
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An Experimental, High-efficiency, Graphic-Tunable Magnetic Loop antenna and loop controller in a 52 pages PDF presentation with drawings and pictures -
The GM3VLB Poor Man's Antenna Analyser -
Lights on why 160 meters is so unpredictable and what is being done to reveal its secrets -
CWQSO allows you to practice sending and receiving morse code in a real QSO. You can send CW via the mouse buttons or an attached paddle, the CW you send is displayed on CWQSO -
Calculating HF helical whip antenna for mobile or portable operation -
Guide to ground mounting antennas, notes on efficiency, elevated installations, metal towers and masts, other mounting schemas, moble homes and rv, lightning protections, artiche by Bencher -
Article on how use Genesys sowftware to design RF power amplifiers -
A project of a small antenna, just 50 cm for the 7 MHz band. An EH Antenna plan for the 40 meters band -
The design and feeding of driven elements for VHF/UHF Yagi antennas , modeling, observations and some case studies by Graham Daubney F/G8MBI