Best links of the week 2 2016

DXZone
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Best links of the week 2 2016

Trap constructionTrap construction
Article and experimentation on multiband antennas of traps for 40 meters band

Vertical Dipole ArrayVertical Dipole Array
A simple and awesome wire monoband antenna, very usefull for portable and dxpeditions usage, consist of two elements, a driver and the reflector. This endfed halfwave gives a very low take off angle and is very suited for chasing DX.

1:49 Transformer1:49 Transformer
This 1:49 transformer is used with wires any multiple of 1/2 wavelength. This is not a matching network, it’s a wideband transformer and it has some advantages compared to LC matching

PSK Express PSK Express
PSK Express is a replacement for YGPSK, it is multi-mode and will allow you to use PSK, RTTY or MFSK at various speeds. Requires .Net framework and run under windows, freeware.

A Portable 75/40 Meter NVIS Antenna A Portable 75/40 Meter NVIS Antenna
This article describes a 75/40 meter NVIS, but one could use the construction techniques to build just a 75 meter or a 40 meter version.

N Type connectors over SO-239 at VHF/UHFN Type connectors over SO-239 at VHF/UHF
How much better is an N over SO-239 at VHF/UHF, a discussion topic at eham

Multiband trap antennasMultiband trap antennas
Detailed analysis of multiband trapped antennas with references on efficiency, height above the ground, feed lines and total length

Yaesu FT-857 CAT Controller Yaesu FT-857 CAT Controller
Free windows basic and simple CAT program specifically for the Yaesu FT-857 radio. It provides an unlimited memory storage area which resides on the client side.

SIM PSK 31SIM PSK 31
SIM PSK 31/63 (Integrated Structured Message BPSK31) is a digital mode based on BPSK that use a structured predefined coded format to send messages, windows free software developed by Nizar Ben Rejeb

CQ machineCQ machine
A voice keyer for field day or general portable operations made with the DH8BQA cq machine kit

Top Amateur Radio Websites – Issue 2002

DXZone
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Top Amateur Radio Websites – Issue 2002

Grounding HF Transceiver using Coax Cable
9M2SX
Improper grounding or earthing system can cause several unwanted RF interferences (RFI) to television sets, broadcast receivers, hi-fi sets and telephone sets. In this Article the author explain how to setup a proper radio shack grounding using coaxial cable and ceramic disc capacitor
Build a twin-lead Lindenblad Antenna for 70cm and 2m
W7HD
This document contains the detailed instructions to build a homemade lindenblad antenna using a twin-lead as dipole elements. This document contains 9 pages and includes a detailed construction sequence and some drawings to build this antenna for UHF and VHF ham radio bands
From Windom Antenna to Multiband OCFD
ON4AA
The Windom antenna, one of the oldest antennas developed for amateur use, has had a complicated history, one as interesting as the theory of the antenna itself.
The Yagi Antenna - Presentation
N5ZGT
A presentation of the Yagi Antennas, and other interesting tid-bits by Brian Mileshosky. This document explains basic concepts of Yagi-Uda antenna theory, influence of reflector and directors on global antenna gain and directivity of radio waves. A simple tape measure antenna project is also included.
Interactive Ham Radio Locator Map
K7FRY
This grid locator map uses Google map apis to find your QTH locator by simply clicking on the map. You can either enter your QTH locator and find the calculated distance and bearing between your QTH and another grid square.
XieGu Tech
XieGu
XieGu Tech manufactures quality amateur radio transceivers and amplifiers designed by BG8HT. Xiegu focus is portable and self contained transceivers perfect for your next SOTA, hiking trip or travel experience.
Amateur Radio Microwave - Introduction
W6BY
Introdcution to Amateur Radio Microwave. A 21 page presentation of ham radio microwaves concepts for beginners. Frequencies, modes and activities. How to get started, what equipment is needed and some pictures of ham radio microwave station setups
The Lindenblad Antenna - Presentation
W7HD
This is a presentation used at OVARC on the LindenBlad antenna construction. The presentation cover several topics about this antenna, from the basic antenna design, to the guide on how to contruct a custom lindenblad antenna for the 2 meters band and and 70 centimenters band.
Retevis
Retevis
Manufacturer of two way radios based in Shenzhen China. Retevis produce commercial, personal and amateur radio handheld and mobile transceivers, either for analog and digital modes. Retevis produce also two-way radio accessories and repeaters.
How to program Motorola APX P25
N2ICV
How to program Motorola APX Series P25 Two-Way Radios for use with the OpenSPOT 2. This document covers some important steps to be followed to upload the correct codeplug to mMtorola P25 radios

Best links of the week 41 2016

DXZone
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Best links of the week 41 2016

A Field Guide to Simple HF Dipoles
A scanned PDF of this interesting book on HF Dipole antennas published by Stanford Research Institute
HF 1 KW Home Made Amplifier
YU1OXB
Topic regarding a new 1KW HF power amplifier with 2x GI7B
The Tower Project
KO4BB
This is a description of how KO4BB built his tower. It is provided in the hope that it will be useful to anyone want to setup his own ham radio tower.
Archimedean Spiral Antenna for RTLSDR
T Milligan
Dodgy plans to make Archimedean spiral antenna for RTLSDR software defined radio receiver. Made of two equal lengths of coaxial cable seems to be the easiest circularly polarized antenna to make that will cover a broad range of the rtlsdr dongles E4000 tuners
SdrDx - OSX and Windows SDR Software
OSX/Mac and Windows versions of SdrDx. Supports RFSPACE, FunCube Pro, Andrus MK1.5, AFEDRI, FunCube Pro Plus, Peaberry, RTL sticks (RTL supported under OS X only, via this OS X RTL server) and Softrock SDR receivers.
Build your own QRSS transmitter
N0QBH
The N0QBH QRSS project page, a couple of projects using available kits for improved frequency and timing stability. A configurable DDS VFO 100mW transmitter with LCD display and a modified Hans Sommers 40m 100mW transmitter
The Raspberry Pi
AA5KV
Using the raspberry Pi for amateur radio operations with digital mode decoding and log book program
Grundig Satellit 3400 Service Manual
Grundig
Service manual of the Grundig Satellit 3400 Portable Shortwave Receiver
IC-718 HF transceiver review
K6QQQ
An interesting review of the Icom IC-718 HF transceiver
Using a Directional Wattmeter to measure VSWR
N1KDO
These simple instructions will guide you through the operations required to calculate antenna system VSWR: preparation, connecting the wattmeter, taking the readings, calculating VSWR, and disconnecting the wattmeter.

Top Amateur Radio links of the week Issue 1715

DXZone
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Top Amateur Radio links of the week Issue 1715

 

1:1 HF Balun
1:1 HF Balun
IZ8JFD
This page contains the description and DIY info for a 1:1 HF current balun. In Italian
The W3EDP Antenna
The W3EDP Antenna
G0KYA
A wire antenna feeded with an unsymmetrical feed and a 1:4 balun can be tuned from 6 to 80 meters band but can be noisier than a dipole and cause RF in the shack
4 to 1 Balun
4 to 1 Balun
N9SES
4:1 FB 3061 ROD x 2 balun can handle 125 Watts
4:1 QRO Balun
4:1 QRO Balun
N9SES
A home made 4:1 Ferrite QRO Bal-un with a FB 241-61 Type K
Small Panel Kits
Small Panel Kits
Jeff Crystal
High performance, IPX7 waterproof small solar panels and battery packs to power radios, sensors, and other portable devices. Solar panels are UV and scratch resistant for long-term use in the field.
HamRadioEngineering.com
HamRadioEngineering.com
hamradioengineering
Amateur Radio site including Curcuit Diagrams, Antenna Construction, Radio Repairs, and serious fun. The Ham Radio Website for Ham Radio and Electrical Engineers, with mods, circuits to build, manuals and projects
JT65-DX.com JT65-HF Japanese Edition
JT65-DX.com JT65-HF Japanese Edition
Shuji Yamanishi
JT65 software download archive for all JT65 editions, includes a JT95 and JT9 operating mode informations, JT65 reference website for Japanese operators.
Recent
Recent
Recent
Quanzhou Risen Electronics Co., Ltd is a leading supplier of wireless communication equipment, produce Marine, HF SDR Radios, Repeaters, PMR Radios, Digital Radios based in China
Sperimental Radio - International DX Group
Sperimental Radio – International DX Group
Sperimental Radio,International DX Group, Sugar Radio, radio group established in 1986
Ham Call Lookup - Windows Phone
Ham Call Lookup – Windows Phone
Mike Pearce
Ham Call Lookup is an windows phone app that allows you to perform amateur radio callsign lookups via QRZ.COM. It also incorporates DX cluster feeds, DXCC information retrieval and Solar data all within one application on your Windows Phone. For callsign lookups, the application uses the QRZ.COM XML interface, please register at QRZ.COM for an account if you do not already have one. The application will happily work with a free QRZ.COM account although it is recommended to use a paid account, as a minimum the XML Logbook Data paid option, in order to access the full functionality of callsign lookups within the application.

Best links of the week 1 2016

DXZone
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Best links of the week 1 2016

W3DZZ Multi-band Antenna 80-40-20-15-10mW3DZZ Multi-band Antenna 80-40-20-15-10m
A multiband antenna that can work from 80 to 10 meters in this illustrated docuemnt by G8ODE

Installing a Vertical Antenna Base with no ConcreteInstalling a Vertical Antenna Base with no Concrete
A step by step approach for a ham radio vertical antenna mount using only a hole, gravel and a piece of plumbing pipe

A Low Cost Multi BandA Low Cost Multi Band
W3DZZ trapped multi-band antenna, exposed in this practical wireless article

The $4 special antennaThe $4 special antenna
A multiband wire antenna with a twinlead feedline that can be easily tuned in several bands, witha 33 ft per leg you can have a 40 to 10 meters band coverage

Simple 20-40 m Dipole AntennaSimple 20-40 m Dipole Antenna
A simple TRAP-dipole project for 20 and 40m bands includes EZNec simulations

Balloon Vertical Omni-AntennasBalloon Vertical Omni-Antennas
Experimenting vertical wire antennas for 40 and 20 meters supported by balloons resulting in excellent gain in RX and good overall performance against horizontal dipole

W3DZZ - a classic dipole heavily modified, W3DZZ – a classic dipole heavily modified,
An easy to build multiband trapped dipole that can work well on short low bands for skip contacts

PL-259 vs Type N Connector on 430 MHzPL-259 vs Type N Connector on 430 MHz
A test and comparison of real attenuation of N-type connectors and PL-259 connectors on UHF bands, domonstrating that connectors are almost equivalent.

Asymmetrical Hatted Vertical DipoleAsymmetrical Hatted Vertical Dipole
Theory and origins of W4RNL Asymmetrical Hatted Vertical Dipole AHVD for portable operations.

W3DZZ - 80 to 10 meter antennaW3DZZ – 80 to 10 meter antenna
A schematic design of the W3DZZ antenna in portugues with description of trap building

Best links of the week

DXZone
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Best links of the week

The best new links of the last week reviewed on The DXZone.com

160-RV - Top Band G5RV Antenna
AD1B
How to turn a G5RV antenna into a 160 meter band antenna with easy to find parts. A G5RV adapter for tob band by Thomas AD1B
RF Chokes
G3TXQ
A chart presenting the results of impedance measurements made on a variety of common-mode choke implementations across the frequency range 1MHz to 30MHz by G3TXQ
Ham Radio Guide to DMR
W2XAB
Amateur Radio Guide to Digital Mobile Radio by W2XAB
Electret Condensor Mic Elements
K3DAV
A complete guide to undestand and know how electret condensor microphone elements works by K3DAV
Simple Hartley Sweeper
BH1RBG
This sweeper built for a narrow bandwidth filter adjustment, use a simple 555 version sawtooth wave generator.
A Heterodyne Sweep Generator
K5BR
A Simple unit which can be used to plot the Response of IF Filters and IF Channels
DMR-Marc
DMR-Marc
Home of the DMR Marc, a digital mobile radio network
Using the PW-1 safely
microHam
An article by MicroHam on using the Icom PW-1 RF Power Amplifier safely and with non-Icom transceivers.
VA3XPR DMR Repeater Blog
VA3XPR
The website for VA3XPR is intended to provide users with information about the VA3XPR repeater, plus news and information related to ham radio digital voice communications.

Best Links of the week 11 2016

DXZone
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Best Links of the week 11 2016

FT857D - All Band Modification
FT857D – All Band Modification
GB3FJ
How to modify the Yaesu FT 857D for transmitting on 5 MHz
Basic Inverted V Antenna
Basic Inverted V Antenna
The Inverted Vee is the most popular antenna used by Ham Radio Operators, because it’s very inexpensive and requires very little time to put up in the air
Radio Coverage Prediction
Radio Coverage Prediction
COVWEB
Online RF coverage mapping application le you display a RF coverage map using google map overlay
CW Skimmer Softrock-based SDR Array
CW Skimmer Softrock-based SDR Array
AC0C
Tracking all bands, all the time, on a budget, with thie 10-band CW Skimmer Software Defined Radio Array
IC-7300: If King Midas was a Ham
IC-7300: If King Midas was a Ham
ICOM America
A review from Icom America about the new Software Defined Radio Icom Transceiver, the new IC-7300, includes video demonstrations of this SDR capabilities
Build your own ADS-B Ground Station
Build your own ADS-B Ground Station
FlightAware
You can now build and run your own ADS-B ground station that can be installed anywhere and receive real-time data directly from airplanes on your computer
Top Band Frequencies
Top Band Frequencies
K8ND
160 meter band allocations by world area, with best and known bad frequencies indications.
10 element Yagi WiFi Antenna
10 element Yagi WiFi Antenna
M1BYT
A DIY project of a WiFi 10 elements Yagi antenna
VK0EK Log Online
VK0EK Log Online
VK0EK
On-line Log for VK0EK DX Pedition
Audio Cables
Audio Cables
wadarc
Article with answers to common questions as what cable types to user, cable length, how to join ends.

Best Links of the week 5 2016

DXZone
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Best Links of the week 5 2016

 

20m 40m trapped squid pole antenna
20m 40m trapped squid pole antenna
VK3ZPF
An homemade portable vertical antenna with a trap near the mid point of the main element. The trap is made with 42mm diameter PVC pipe with 9 turns of wire on it
End Fed Long Wire Antenna
End Fed Long Wire Antenna
WB5CXC
The antenna is an inexpensive, multiband, end fed HF antenna. It has a matching network consisting of a toroid core and an antenna lead of 30
Locating RF Interference at HF
Locating RF Interference at HF
W0IVJ
A proven and practical approach to dealing with RFI from grow lights and more.
160m - 80m Transmit Vertical
160m – 80m Transmit Vertical
ac0c
Adding topband to a full sized elevated 80m vertical and putting N6LF QEX data to the test
Overview on some SOTA portable antennas
Overview on some SOTA portable antennas
VK5PAS
A review of some portable antennas for SOTA operations, including linked dipoles, end-fed, verticals
Getting Started with the FM Satellites
Getting Started with the FM Satellites
AMSAT
If you can program split-frequency memories in your dual-band radio, or your dual-band radio has two VFOs, you can work an FM satellite
Swiss Quad Portabel, DH1PLY
Swiss Quad Portabel, DH1PLY
DH1PLY
A portable swiss quad antenna project made with components and parts that can be dismounted, in German
JK Antennas
JK Antennas
JK Antennas
US amateur radio antenna manufacturer, design and build monoband, dual band and multiband Yagi Antennas for HF bands as well as receive antenna systems
Making Antenna Insulators
Making Antenna Insulators
K5CNF
Making Antenna Insulators for Wire Antennas
Antenna Insulators for LF-MF
Antenna Insulators for LF-MF
W5JGV
Homebrewing special insulators with PVC and copper corona rings

Best Links of the week 42 2015

DXZone
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Best Links of the week 42 2015

Build your own HF balun
Build your own HF balun
EA4EOZ
A balun is a MUST for dipoles or similar antennas when they are feed with coaxial cables. Many hams connect the center conductor of the coaxial cable to one side of the dipole, and the shield to the other. Wrong!
OCF Dipole
OCF Dipole
WD5TYL
This is a popular antenna design as the performance is very good across the HF bands and requires little or no tuning. It is a dipole fed off center with a 4:1 current balun at the offset feedpoint. The antenna shown covers 80, 40, 20 and 10 meters with 15 meters and WARC bands
Handheld 2.4 GHz Spectrum Analyzer
Handheld 2.4 GHz Spectrum Analyzer
EA4EOZ
A spectrum analyzer based on ATMega8 microcontroller and a CYWM6935 within a Nokia mobile phone case.
NVIS Antenna Design
NVIS Antenna Design
W5JCK
A presentation on designing Near-Vertical Incidence Skywave (NVIS) antennas and all related EZNEC models in a single zip file or the single presentation in PDF File
Elecraft KX3 the Magic Radio
Elecraft KX3 the Magic Radio
W5TOM
Software Defined, User Assembled, an Adventure a personal review by W5TOM
FT-817 Interface
FT-817 Interface
IW7EHC
CAT and Digital modes interface for the Yaesu FT-817
6m Band Halo
6m Band Halo
DJ7OO
An home made Halo antenna for the 50 MHz with drawing and pictures in German
Yaesu FT 897 fan mods
Yaesu FT 897 fan mods
on4vp
A video demonstrating SMD board inside FT-897D to makes the two fans run only when temperature threshold is reached
LAPD Radio Frequencies
LAPD Radio Frequencies
harrymarnell.net
List of LAPD radio frequencies
4WDX.com 4 Wheel DX
4WDX.com 4 Wheel DX
Peter Fraenkel
A web site dedicate to those who enjoy working the airwaves from a Jeep, Land Rover or anything with 4 wheels

Best links of the week

DXZone
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Best links of the week

Build an Inverted Vee Antenna
KD5OM
Notes on how to build an inverted V wire antenna with lenghts for all HF bands from 160 mtrs to 10 mtrs
Amateur Radio Satellites
KA7FVV
A list of active Amateur Radio satellites grouped by FM SSB/CW and satellite monitoring
7 MHz QRP transmitter
A 40 meter QRP - Transceiver by DL5NEG
UV-5R Keypad and functions
UV5R / UV82 series UV5R, UV82, GT3, BFF8, F8HP, etc Keypad Layout and Functions
Programming UV-5R
Programming memories manually the Baofeng UV-5R
SAMs Photofacts
Steve Johnson
Sams Photofact download Schematics and Service Manuals, Originals and downloads.
The Morse Telegraph Club
An international non-profit organization dedicated to the perpetuation of the knowledge and traditions of telegraphy
UV-5R User Manuals
Original User Manual for the Baofeng UV5R
Air mail Postage
International postage stamps by K3FN
Procell
Joey Kuo
Pro-cell Co., Ltd was established in 1995 to produce and develop wireless components. In the beginning stage, we concentrated on producing GSM antennas, now produce Commercial- RFID, GSM UMTS GPRS LTE WLAN Wi-Fi Wi-Max, PMR & Tetra antennas
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