DXZone.com

Top Amateur Radio Websites - Issue 2128

160m Spitfire Antenna, Portable HF Antenna Options , Kenwood Ts590 v Elecraft K3, FTdx3000 Information pages, Kantronics TNC Wiring, USB to Serial Drivers by PROLIFIC, PC programming cable for Kenwood TH-F7E

Top Amateur Radio Websites - Issue 2127

Homebrewing a 6 Meter Yagi, Online Toroid Multi Calculator, RF Impedance Matching Calculator, IAT Interactive Antenna Table , Basic Microwave Antennas, FT-817 CAT interface, 17 meter QRP Transmitter,

Speech synthesiser for FT-817

Technical Reference/Arduino
This construction project is for anyone wanting to give this popular little radio a voice of its own. This Speech synthesiser reads out the current frequency, mode and menu settings whenever they are changed via the front-panel controls

600W LDMOS Power Amplifier

Technical Reference/Amplifiers/HF Amplifiers
A comeplete home made 600W LDMOS RF power amplifier. Settings can be made on a 7-inch touch screen, and on this screen you can see a lot of useful information during operation, such as output power, temperature, SWR, and so on. The power amplifier includes 2 MRF300 LDMOS FETs and several built-in sensors. The amplifier also contains several types of protection functions like too high current, too high swr, too high temperature, etc.

EZNEC (PRO/2) WILL BE FREE

Beginning 2022 EZNEC will be released to the public domain and become free of cost and can be freely copied and distributed.

Operating AMTOR

Operating Modes/Amtor
Putting one of those old modems back into use.AMTOR is an acronym for AMateur Teleprinting Over Radio and was mostly used on HF. The mode is based on the marine SITOR code that was introduced to amateur radio by Peter, G3PLX. The mode is an enhancement of RTTY with active error correction that copes reasonably well with interference and fading.

The G4AON SSB Transmitter

Technical Reference/HF Radios
This transmitter covers the 160, 80, 40 and 20 metre bands and provides both SSB and properly generated CW. The CW side of this transmitter is not compromised and produces excellent CW. On SSB the audio has been tailored to provide a rising response to 3 KHz, with a sharp drop above that frequency. There is RF speech clipping to both provide more "punch" and to limit the peak output.

Top Amateur Radio Websites - Issue 2125

Speaker Wire EFHW Antennas 20m/ 40m, QRP 20m Transmitter, 4m QRP Transverter, A Homebrew Yagi for 1296 MHz DX, 23cm 1296MHz Field Day Yagi, Short DL6WU yagi for 23cm, DL6WU Yagi Antennas for 1200 MHz

ICOM IC-R20

IC-R20 by Icom. Wideband Receiver Professional radioreceiver, allow double receiver, from HF to Microwave, digital recorde, DTCS, Memories and 11 hours countinuous reception.

Building a VHF Contest Station

DX Resources/Contest/Contest Stations
Building an amateur station for competitive radiosport involves a number of critical steps, regardless of the band or bands you focus on. These include, but are certainly not limited to: Station layout, Equipment interconnection and switching, Inter-station interference, Antenna selection. Radio interface with the logging program, CW and voice keyer integration, Rotator control

Miracle Whip Inspired Antenna Tuner

Antennas/Tuners
There are quite a few variants of the design accompanied with many opinions on the effectiveness of the antenna. This page features links to some similar projects and a homebrewed personalized version of this portable antenna tuner

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