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- Technical Reference > 3D Printed Projects
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- Antennas > 12M
- Antennas > 20M
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Diplexer is a passive device, a special filter circuit that seperates 2 different bands, not to be confused with the duplexer that usually separate 2 different frequencies on the same band. -
A small random wire antenna tune that can tune from 40 to 10 meters bands. -
A magnetic loop antenna working from 30 to 15 meters with 100W -
The future of two way radio is digital. -
This Z-Match is a link coupled all-band tuner. Two all band tank circuits cover 3-14mhz and 14-30mhz. The tank output links are selected with a very heavy duty SPDT rotary switch. -
Interesting article on how build your own field day antenna -
homebrew a frequency counter by M1HOG -
As the sunspots return and DX propagation conditions to improve, the age old problem with QRM begins to show up on the amateur bands. Thif filter help you on improving reception -
Magnetic loop for 20 to 6 metres pedestrian mobile by VK3YE -
Article about small magnetic loop antennas with notes on realization of magnetic loops for several HF bands and the six meter band -
The N3UJJ multi band cage dipole antenna project thay can fit a small property -
This article loaded with nice pictures and schematics, describes a 160-10 meter linear amplifier that uses a pair of 3-500Z triode power tubes. It was designed and constructed by William Moneysmith, W4NFR. The amplifier features fast warm up and 1500-Watt RF output with 100-Watts of drive. -
A moxon antenna project made with wires and fiberglass poles -
This project hereby presented is a complete HAM radio simplex 'smart' repeater, built around a Motorola GM-350/950, Arduino NANO board and a WINBOND audio recording integrated circuit -
Open-Source Software Implementation of a DRM (Digital Radio Mondiale) Receiver. Dream runs on virtually any pc and requires a receiver front-end to work as a real radio. -
A DIY guide to build your own compact multiband HF antenna based on the G3TXQ version using a 1:4 balun. This article includes the full part list and instructions to assembly, including the center plate. -
Design and build an 6 m dipole antenna from aluminum, tubing, that resembles the active element of a yagi beam antenna. -
A cooperative venture between MSUARC and Calloway County Fire and Rescue -
A simple fixed frequency SSB voice transceiver for the 7 MHz amateur band -
An open collaborated project for creating base libraries and applications to allow the passing of information from the host computer to the D-STAR radio and vice versa. -
Modifying consumer off the shelf wireless LAN devices for specialized amateur use -
10 meter propigation beacon project -
Project to build sets of band pass transmitting filters for reducing the interference between HF transceivers operated in close proximity -
A magnetic loops for HF pedestrian mobile project by VK3YE -
An homebrew Lindenblad antenna designed specifically for LEOs reception. -
A compact 2 element W8JK beam antenna for 20M to 10M bands by AF6SA -
Mounting on Roof or at Ground Level? Why ground plane antenna works better at lower level. -
A K9AY loop antenna project done with Far Circuits pc boards for the antenna switch and bandpass filter and preamp by K7SFN -
A simple to build full length 20/40 dipole antenna to be used in inverted vee configuration -
AF6SA USB antenna AZ-EL rotor controller compatible with Yaesu G-5500, G-450, G-650, HY-Gain and other AC motor rotors -
An indeal stealth antenna made by multiple quarter wave verticals, supported by a tree. -
The purpose of this project is to build a smart switch A smart swith is a swith that needs a short press and the power will be turned ON. -
Yet another Arduino CW Decoder based on the OZ1JHM prototype this include a custom program that can be downlaoded along to component list and pictures -
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An high gain long yagi antenna, seven elements, for six meters band -
A simple coax cable tester built based on the KG0ZZ project. -
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Taking the venerable SMK-1 design to 20m and adding an RF amp, audio filter, and a TiCK Keyer ... by Wayne McFee, NB6M -
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On these pages you will find articles and pictures reagarding a renewed Drake TR7 by DK4DDS -
End-Fed Half Wave matching unit project, based on a FT140-43 with SWR plot tests made using capacitor and without. -
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An inexpensive rechargeable CMOS battery system that can be built from readily available parts. -
Schematic of a homebrew receiver and keying -
If you want to build a cw decoder without using other active components than an atmel 328 - Arduino UNO , then this is sure something for you. -
The AB2RA bowtie 80 meter antenna includes also a 40 meter dipole -
W5UXH version of OZ1JHM Morse Code decoder project -
A family of small size QRP SSB transceivers for the 15 MHz. Includes a cigarette pocket size QRP transceiver and a larger shirt-pocket transceiver. -
An Arduino uno based project to control an MFJ 998 antenna tuner via Icom CI-V interface by VE1ZAC -
A home made project for a 3 to 12 MHz signal generator