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Best links of the week 2 2016

January 17, 2016, 1:26 am
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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

The post Best links of the week 2 2016 appeared first on The DXZone.

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IC-7300 Video

January 21, 2016, 11:59 am
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16 Awesome Homemade Morse Keys

January 22, 2016, 3:02 pm
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    2. The Grand G3YUH Morse Key Project
    How to build an excellent key for very little cost with homebreweing description and detailed pictures (by G3YUH)
    3. Five Cent CW key
    The 5 cent home made morse key (by OH7SV)
    4. G3YUH Morse Key Project
    These pages cover the step by step construction of a Handmade Morse code telegraph key in pictures and text (by G3YUH)
    5. Mini CW key
    A project of a small CW key where most of the part is mechanical construction and a few just electronics by py2ohh (by PY2OHH)
    6. Single Lever CW Paddle
    An inexpensive CW key you can build (by KO4BB)
    7. Single-Lever CW Paddle
    AG4RQ's Homebrew Single-Lever CW Paddle (by info)
    8. SP5GJN HF amplifiers & CW Keys
    A collection of home made HF power amplifiers and home made CW Keys & Paddles (by SP5GJN )
    9. The UD a light weight iambic key
    This is a light weight iambic key that works well for qrp expeditions. You hold it comfortably in one hand and manipulate the 'paddles' with you thumb and forefinger. The other hand is free to write, tune the radio or do other tasks. (by KC8UD)
    10. Home Made Paddle Key and Keyer
    Home made twin paddle morse code key designed by Steve Taylor G4EDG. (by MorseMad)
    11. PC-board iambic CW paddle
    An homemade cw paddle made in a double lever version for iambic keying out of a PC-board and in the same article the homemade Palm Mini-Paddle (by PA0CMU)
    12. NB6M paddles
    Paddles made from readily available materials, like double sided PC board material and cost almost nothing to build. (by NB6M)
    13. Poor man's paddle
    An homemade cw paddle made with a double-sided copper clad (PCB). (by risc-a-day)
    14. The Sideswiper
    Homemade morse code sideswiper key with nice pictures and assembly instructions (by PA4NIC)
    15. Home Made CW Paddle
    Home Made CW paddles made from a printed circuit board and a teflon mounting block while contacts are made with simple brass threaded rods. (by VK3YY )
    16. Ultra-lightweight Morse code keyer paddle
    an homemade ultra lightweight Morse code keyer paddle that can be used as a manual straight key (by N1AL)
    17. J-37 Paddles
    A Home made paddle made with two J-37 (by W5TOM)

You may be interested also on some of our links categories dedicated to morse code:

 

 

 

The post 16 Awesome Homemade Morse Keys appeared first on The DXZone.

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Best links of the week 3 2016

January 24, 2016, 12:38 am
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VHF Big Wheel AntennaVHF Big Wheel Antenna
A popular 2 meter antenna returns in an improved, easier to reproduce form, 2008 QST article

Raspberry Pi Weather StationRaspberry Pi Weather Station
A complete DIY Raspberry Pi Weather Station including software, capable to read wind speed, wind direction, rain gauge and with a temperature and humidity sensor along to a camera.

W3EDP Antenna NotesW3EDP Antenna Notes
Hints for building a W3EDP-Antenna, includes the construction of the 1:4-balun by DK7ZB

FT-857 display problemFT-857 display problem
Causes and advices on malfunctioning display in the control head of the FT-857, where several scan lines in the dot-matrix display cease to function, so the display seems streaked at places

HamRadioBay - Amateur Radio MarketHamRadioBay – Amateur Radio Market
Online market entirely dedicated to fans of the radio. Sell and buy as auction, fixed price and shop.

Ultra-lightweight Morse code keyer paddleUltra-lightweight Morse code keyer paddle
an homemade ultra lightweight Morse code keyer paddle that can be used as a manual straight key

Home Made Paddle Key and KeyerHome Made Paddle Key and Keyer
Home made twin paddle morse code key designed by Steve Taylor G4EDG.

PC-board iambic CW paddlePC-board iambic CW paddle
An homemade cw paddle made in a double lever version for iambic keying out of a PC-board and in the same article the homemade Palm Mini-Paddle

Arduino simple signal generatorArduino simple signal generator
Build a Arduino simple signal generator with an arduino board and some resistor to work as a 8bit DAC

SB-200 Sleeper Tank ModsSB-200 Sleeper Tank Mods
A Quick Overhaul to the SB-200 Tank Circuit

The post Best links of the week 3 2016 appeared first on The DXZone.

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IC-7300 RTTY Video

January 24, 2016, 3:58 pm
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4X429DS Dead Sea DxPedition 2016

January 27, 2016, 10:26 am
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Dead Sea DxPedition 2016

From the earth’s lowest elevation on land ever at -429 Meters Below Sea Level
The Dead Sea : 4X429DS

We will be active all bands all modes starting March 3rd to March 6th 2016

A Very Special Award will be Awarded to each station that has Confirmed us on 3 bands (any Mode)

QSL info via QRZ.com page

info via Amir 4X6TT

 

The post 4X429DS Dead Sea DxPedition 2016 appeared first on The DXZone.

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5 Great Yagi Antenna projects for 40 Meters Band

January 30, 2016, 6:34 am
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In the week when we celebrates Hidetsugu Yagi’s 130th Birthday we selected 5 homemade Yagi-Uda Antenna Project for the 7 MHz.

40 meter Yagi antennas, are complex to build due to the overall antenna dimension, and the world wide web unfortunately does not offer many projects, but we discovered some realizations that could inspire you to build one.

    2. 2 Element Helical Yagi Beam for 40m
    A helically wound two element 40 meter yagi beam antenna from a 1974 QST article (by W1FBY)
    3. 2 elements YAGI for field day operation
    A wire yagi antenna for 20 and 40 meters band suitable for outdoor and field day operations (by VE3RGW)
    4. 3 element Yagi for 40m
    EF403 is a 3 element yagi antenna for the 40 meters band with high gain and F/B Ratio (by YU7EF)
    5. 40m 2 Element Yagi Beam
    A 40 meter band two elements yagi beam with a 6mt boom with pictures and drawings (by TA7OM)
    6. 40 Meters 3 element Wire Yagi
    A three element wire yagi antenna for 7 MHz project plan with drawings and EZNEC model (by VE3VN)

You may be interested in:

The post 5 Great Yagi Antenna projects for 40 Meters Band appeared first on The DXZone.

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Best Links of the week 4 2016

January 31, 2016, 1:11 am
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40m 2 Element Yagi Beam
40m 2 Element Yagi Beam
TA7OM
A 40 meter band two elements yagi beam with a 6mt boom with pictures and drawings
2 Element Helical Yagi Beam for 40m
2 Element Helical Yagi Beam for 40m
W1FBY
A helically wound two element 40 meter yagi beam antenna from a 1974 QST article
40 Meters 3 element Wire Yagi
40 Meters 3 element Wire Yagi
VE3VN
A three element wire yagi antenna for 7 MHz project plan with drawings and EZNEC model
3 elements Yagi For 50 MHz
3 elements Yagi For 50 MHz
G0BZF
A portable three element 6M yagi for less than twenty pounds
Lindenblad Antenna Project
Lindenblad Antenna Project
G0MGX
An homebrew Lindenblad antenna designed specifically for LEOs reception.
Icom IC-7851 Review
Icom IC-7851 Review
VA7OJ
A complete test report on Icom IC-7851 obtained with some lab tests, in a 21 pages pdf file.
2 Meters Lindenblad Antenna
2 Meters Lindenblad Antenna
Die_Bastelkammer
3d parts printed to build an EZ-Lindenblad 2 Meters LEO Sat antenna as designed from Anthony Monteiro
ICOM IC-7300 English Manual
ICOM IC-7300 English Manual
Icom
English manual in PDF format of the Icom IC-7300 HF / 50 MHz transceiver
137MHz Turnstile Antenna
137MHz Turnstile Antenna
DigitalHam
Turnstile Antenna for APT satellite reception
Yaesu FT-991 Review
Yaesu FT-991 Review
PA2OLD
Results of real world usage of the Yaesu FT-991 HF VHF UHF all mode transceiver

The post Best Links of the week 4 2016 appeared first on The DXZone.

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How to make Dipole and Vertical Center Insulator

February 4, 2016, 3:35 pm
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A very nice, and well done video posted in our G+ HamRadio Antenna community by Cory Klumper (NØECK) on how to build center insulators for HF wire antennas.

This video is part of our Youtube PlayList you can browse on the DXZone.com Youtube Channel.

 

Some additional resources you may be interested on about Antenna Insulators

    2. Center feed insulator
    A center antenna insulator with feedline strain relief (by KC8AON)
    3. Installing dipole insulators
    Installing your dipole end insulators, a beginner guide to proper setup wires to insultaors.
    4. Making Antenna Insulators
    Making Antenna Insulators for Wire Antennas (by K5CNF)
    5. Antenna Insulators for LF-MF
    Homebrewing special insulators with PVC and copper corona rings (by W5JGV)

 

The post How to make Dipole and Vertical Center Insulator appeared first on The DXZone.

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Best Links of the week 5 2016

February 7, 2016, 1:43 am
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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

The post Best Links of the week 5 2016 appeared first on The DXZone.

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10 Cool VHF Portable Antennas You Can Make At Home

February 12, 2016, 5:18 pm
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    2. Portable 4-Element Quad for 2 meters
    A portable 4 elements quad antenna for 144 MHz, 9 to 10 DBd forward gain, 30 DB front-to-back ratio, and 33 DB front-to-side ratio (by N1LO)
    3. Portable Yagi for 144MHz
    Simple 7 element Yagi is ideal for portable operation. The elements can be removed and replaced in a few minutes. The 2.42 m boom will fit inside a car, the elements are made from 6mm solid aluminium rod. (by EI9GQ)
    4. 100 grams VHF yagi
    A portable VHF home-made Yagi-Uda antenna, that is extremely easy to build and very cheap. Moreover this antenna, while dismounted is just 1 meter long, and the total weight is just 100 grams. (by IZ2UUF)
    5. 2m Pocket Beam
    The 2m portable pocket beam is a small 2 element yagi antenna (by GW0VMW)
    6. A portable 2-element VHF yagi
    Build a portable VHF yagi antenna for 2 meters. All you need is two rabbit ear antennas from Radio Shack, two CATV baluns, four feet of 3/4 CPVC pipe with one tee. (by K3MT)
    7. Portable VHF Ground Plane
    A simple portable VHF ground plane antenna project used for ARES activities (by N5ESE)
    8. Portable 2 meter Yagi
    Building a 2 metre 144MHz VHF Yagi beam antenna, designed for portable use. (by M0UKD)
    9. 3 element portable Yagi for 2 meters
    The I DX is a homemade 3 element portable Yagi-UDA ante a for 144 MHz (by MW0IDX)
    10. Experiments with a Moxon Rectangle antenna
    An easy to build moxon antenna for portable use. A Moxon Rectangle is a two element beam, where both elements are folded towards eachother. (by IK1ZYW)
    11. 144MHz Pocket Portable Yagi
    Design for a 5 element 2 Metre beam with a forward gain of 8dBD and a front to back ratio of over 24dB. (by G4DHF)

The post 10 Cool VHF Portable Antennas You Can Make At Home appeared first on The DXZone.

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Best links of the week 6 2016

February 14, 2016, 3:32 am
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Portable link dipole
Portable link dipole
VK3ZPF
A lightweight inverted vee antenna that can be supported by a 10 metre long fiberglass squid pole. The antenna is designed to cover 10, 15, 20, 40 and 80 m bands.
An Easy Dual Band VHF UHF Antenna
An Easy Dual Band VHF UHF Antenna
KD6GLF
A dual band portable J-Pole antenna that is really easy to build from a QST article
Antenna Wire Launcher
Antenna Wire Launcher
WB5CXC
This project is to build an Antenna Wire Launcher (Spud Gun). It is constructed from PVC pipe and has a manual release. The device will send a puck over 100 trees without much work.
5 Element 2M / 70cm Yagi
5 Element 2M / 70cm Yagi
WB5CXC
On this page is the design for Dual Band 2M / 70cm antenna with 3.2mm elements. The antenna has a 50 ohm designed driver. This Yagi has a unique element called a Open Sleeve
BP-3 Polish WWII Spy Radio Set
BP-3 Polish WWII Spy Radio Set
CryptMuseum
The BP-3 was a valve-based spy radio transceiver, developed during WWII by Tadeusz Heftman of the Polish Military Wireless Unit in Stanmore (UK). It was introduced in 1943 and was intended for use by Agents and Resistance Organisations in Europe. The transmitter produces an output power of 50 Watts in CW
Repairing a 40m Yagi
Repairing a 40m Yagi
WB9Z
WB9Z working on a 40 meter Yagi, at 140 feet
Go-Box for Emcom
Go-Box for Emcom
WB5CXC
Build a Go-Box for Emergency Operations and for Portable Operations
The myth of SWR causing coax radiation
The myth of SWR causing coax radiation
IZ2UUF
There are several reasons that can cause coax line radiation, most of them are related to wrong or missing use of a balun, but none can be imputed to load mismatch.
Icom America IC-7300 Page
Icom America IC-7300 Page
Icom
Official product page of Icom IC-7300 at Icom America web site
Icom IC-7300
Icom IC-7300
Icom
Icom IC-7300 english brochure, technical specifications and product description

The post Best links of the week 6 2016 appeared first on The DXZone.

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Best links of the week 7 2016

February 20, 2016, 11:08 pm
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About Lightning Protection
About Lightning Protection
w0tlm
Ham Radio Station Grounding for Lightning Protection presentation
Z-Match Antenna Tuner
Z-Match Antenna Tuner
AD5X
A 100-watt Compact Z-Match Antenna Tuner that can match just about anything on all HF bands, and only uses two control
3XY1T Log Online
3XY1T Log Online
3XY1T
On-line log for 3XY1T Guinea DX Pedition 2016
Portable HF Antennas
Portable HF Antennas
Jon Perelstein
Presentation on HF portable antennas to the Stamford Amateur Radio Association by Jon Perelstein
Buddipole vertical on 40m
Buddipole vertical on 40m
N4LA
A report on working a CQWW SSB on 40m with a vertical buddipole antenna
Buddipole Deluxe Review
Buddipole Deluxe Review
IW5EDI
A review of the Buddipole Deluxe Antenna portable HF VHF ham radio antenna
20 40 80 Trapped Dipole
20 40 80 Trapped Dipole
VK3ZPF
An homemade portable trapped dipole antenna for 40 and 80 meters band with an optional extension for the 20 meters.
ClubPi
ClubPi
NX1P
Raspberry Pi to Clublog bridge that consumes broadcasted QSOs from N1MM, transforms the QSOs into ClubLog ADIF format and sends those QSOs in batch or real-time to ClubLog automatically
A35T Log Online
A35T Log Online
A35T
Check On-line Log for A35T Tonga DX Pedition 2016
ET7L Log Online
ET7L Log Online
ET7L
Online log for ET7L DX Pedition to Ethiopia 2016

The post Best links of the week 7 2016 appeared first on The DXZone.

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How to fix TVI Problems

February 27, 2016, 10:04 am
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    2. TVi Basics - making filters
    TV Interference filters, making TVI filters, coaxial filters to eliminate TV interferences caused by radio frequency (by HS0ZEE)
    3. TVI and BCI Filters
    TVI and BCI bandpass and bandstop filters in SMD technique. Schematics and images. (by Christoph Petermann)
    4. TVI Filters
    Schematic and diagrams for TVI Filters (by G4WPW)
    5. Television Notch Filters
    Intersting article about TV interference, with several examples of TVI Filters, to reduce the passage of any RF above the 30 MHz including commercial Low Pass Filters, home made notch filters or coaxial filters. (by HS0ZEE)
    6. Ham Radio TVI in the 21st Century
    Ham radio transmissions can interfere with television reception. This is called television interference, or ham radio TVI. Consumer adoption of cable television has significantly reduced ham radio TVI. But the introduction of IPTV, or television over phone systems, has brought ham radio TVI back, often with a vengeance. Here's why (by VE6EY)
    7. Fixing a 2 meter TVI Problem
    Fix VHF TVI problems usign a quarter wave stub filter (by VK4JRO)
    8. TVI Filters for 2m and 70cm
    The TVI filters described in this page worked very well in curing a TVI problem on 2m abd 70cm (by VK3NX)

Check for more TVI Filters in our links directory or learn more about Radio Frequency Interference

 

The post How to fix TVI Problems appeared first on The DXZone.

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Best links of the week 8 2016

February 29, 2016, 5:38 am
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HF2V 80 40m Vertical
HF2V 80 40m Vertical
EI7BA
Article on the HF dual band antenna with construction details and how to add 160 meters to the HF2V
Portable or Emergency VHF Antennas
Portable or Emergency VHF Antennas
KE7HR
Ground Plane – 1/4 wave vertical, J-Pole, 3 Element Yagi Beam and simple antenna supports
All About Antennas
All About Antennas
W8JHD
A free five part series on antennas that covers many aspects of antennas, from radio wave propagation, to feed lines, type of antennas, connectors, adaptors and antenna switches by Bob Grove, publisher of Monitoring Times
The Butternut HF2V antenna after three years
The Butternut HF2V antenna after three years
OZ9AEC
HF2V antenna maintenance photos and antenna review after three years of usage
EAxbeam
EAxbeam
EA1HVY
Spanish HexBeam antenna manufacturer, produce antennas kits, and part for HexBeam antennas
Basic Wire Antennas Part II
Basic Wire Antennas Part II
N4UFP
Presentation about wire antennas, focusing on Loops , inverted L and Verticals
Equipment for portable HF operations
Equipment for portable HF operations
LX4SKY
An excellent and comprehensive article on portable HF operations with attention on selecting proper equipment
A Portable Quad for 2 Meters
A Portable Quad for 2 Meters
WA9GDZ
Backpacking, boating or mountaintopping ? Invest your time and pack this novel directional gain antenna on your next expedition
Icom IC-706MkIIG Operation Guide
Icom IC-706MkIIG Operation Guide
KE1RI
Review of the Icom IC-706 series, include a short demo video and a short menu table available for download
The Buddipole Deluxe Antenna Review
The Buddipole Deluxe Antenna Review
M0VST
The Buddipole antenna is a very compact lightweight antenna that covers from 40 meters to 2 meters as standard and can be homebrewed to work on 80m and 160m or larger coils can be bought for 80m operation.

The post Best links of the week 8 2016 appeared first on The DXZone.

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9 Brilliant Ideas To Make Your Own Dummy Load

March 4, 2016, 3:36 pm
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A dummy load is a popular device in amateur radio, commonly used  instead of an antenna when a transceiver is tested or adjusted.

Practically it is a device that simulate an antenna, and permit to test transmission without radiating, absorbing the amount of power that the transceiver delivers.

In these examples you will learn how to homemade your own dummy load.

    2. Salt water dummy load
    Use plain water with a little salt added to build your own Dummy Load (by K5LXP)
    3. 100 W Dummy Load
    This was a project to make a dummy load or, as the finished thing is more correctly labelled, a fifty ohm resistive load. (by G5VZ)
    4. 5400 W Dummy Load
    High Voltage Dummy Load 3000 OHMS, 5400 WATTS There are 45 layers of 6 resistors, each one being 400 OHMS @ 20 Watts for a total of 270 resistors (by W4ZT)
    5. A 50 ohm dummy load
    Make your own dummy load with two 100-ohm 5W resistors
    6. N5ESE QRP Dummy Load
    A homemade QRP Dummy Load with built-in RF detector (by N5ESE)
    7. QRP Power Meter and Dummy Load
    In this article the schematic is of AA5TB QRP power meter and dummy (50 Ohm) load combination (by AA5TB)
    8. Oil filled dummy load
    This project will demonstrate how to build a dummy load, and measure power correctly (by AI4JI)
    9. Building a Dummy Load
    Building a Dummy Load and Measuring Power Accurately (by K4EAA)
    10. Building A RF Dummy Load
    If your doing any home brewing gear for ham radio its a great idea to have a dummy load. This will to your radio be the perfect antenna...it will never radiate but your radio sees a perfect 50 Ohm impedance. (by linuxwolfpack)

The post 9 Brilliant Ideas To Make Your Own Dummy Load appeared first on The DXZone.

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Best links of the week 9 2016

March 6, 2016, 12:54 pm
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Multiband end fed antennas
Multiband end fed antennas
PD7MAA
This is a 200 Watt PEP step up transformer for end fed full and half wave antennas without radials, designed as a 200 Watt PEP
Yes, all my Coax Cables are 75 Ohms
Yes, all my Coax Cables are 75 Ohms
CO2KK
CO2KK exposes some myths about using 75-ohm feedline with 50-ohm rigs and show how to build a cotanget transformer
Basic Wire Antennas Part I
Basic Wire Antennas Part I
N4UFP
A presentation of popular wire antenna models like Dipoles, half size, full size, doble zepp, ocf dipoles, G5RV
Homebrew dummy load
Homebrew dummy load
LB0MG
A simple 50 ohm dummy load to test transmitters. includes a simple RF diode detector to measure the peak voltage, and calculate the power
RTLSDR Coax Stub
RTLSDR Coax Stub
M0NRD
Cutting out the noise using a simple coax filter to improve the poor front end filtering
Hexbeam 6 bands antenna
Hexbeam 6 bands antenna
OZ1CX
An HexBeam antenna project, a 2 full elements on six bands
Cheap power supply for the FT-817
Cheap power supply for the FT-817
PD7MAA
The Toshiba PA3083U-1ACA laptop powersupply deliveres 15V at 5A without any noise
GMRS FRS Frequencies and CTCSS
GMRS FRS Frequencies and CTCSS
kv5r
GMRS Interstitial Simplex & FRS Frequencies Interstitial frequencies are available for simplex use by all GMRS licensees.
Understanding TV and Radio Interference
Understanding TV and Radio Interference
W1FB
Simple steps you can take to solve most problems caused by station equipment
144 Mhz Stop band TVI filters
144 Mhz Stop band TVI filters
LA8AK
A High pass filter will not help, use a stop-band filter to notch out the beast.

The post Best links of the week 9 2016 appeared first on The DXZone.

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How to Solder and Desolder

March 12, 2016, 8:15 am
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A selection of resources taked from our Soldering and desoldering electronic components, wires and connectors links category

    2. A Guide to Better Soldering
    Basic guide on soldering techniques, tips and tricks
    3. Ask Dr. Solder
    Answers to common soldering questions by Conrad Weiss (by NN6CW)
    4. How To Solder
    Pictures and description for a perfect soldering.A tutorial on soldering technique includes videos. (by Aaroncake)
    5. Soldering Guide
    A guide to making good soldered joints and desoldering tips, includes an interesting how-to-guide on properly soldering electronic components (by electronicsclub)
    6. Basic De-soldering Guide
    A pictorial guide to the basic ways of desoldering joints (by epemag.wimborne)
    7. How to desolder components
    Learn how to correctly desolder electronic components from printed circuit boards (by hardwaresecrets.com)
    8. Soldering Tips
    Good equipment and a good soldering technique are both essential to successful assembly of any device. Read these tips before you start. (by N0SS)
    9. Succesful soldering
    Tips and tricks for succesful soldering. An illustrated guide for beguinners and an usefull reminder for expert in soldering.

SOLDERING AND DESOLDERING VIDEOS

How to Desolder Through-Hole Parts

Easy Ways to Unsolder & Soldering

Beginners Guide to Solder

How To Solder Basic Wires and Connectors

The post How to Solder and Desolder appeared first on The DXZone.

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Best links of the week 10 2016

March 13, 2016, 12:22 am
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Wall Loop for 20m
Wall Loop for 20m
PD7MAA
This max size magnetic loop antenna for 14 MHz with a totall circumference of 6m is designed to attach to a wall
Arduino SWR and Power Meter
Arduino SWR and Power Meter
LB0MG
The circuit is based on two AD8307 log amplifiers, which are connected to the forward and reflected ports on a directional coupler
Introduction to ICOM 7300
Introduction to ICOM 7300
ICOM UK
In this youtube video G8GKC M0KKW and 2E0IAJ from Icom UK give a global overview of the ICOM IC-7300 HF 50 70MHz Software Defined Radio transceiver
Hexbeam base plate
Hexbeam base plate
FY8PE
An homemade base plate for the hexbeam antenna
Coax Stubs and Band Pass Filters
Coax Stubs and Band Pass Filters
DH1TW
Will additional coax stubs improve Band Pass Filter performance?
QRP Multi-band EFHW antenna for SOTA
QRP Multi-band EFHW antenna for SOTA
VK1AD
Link End Fed Half Wave Antenna and Tuner for SOTA designed to work on 15m, 20m, and 40m.
HF 6m 2m SSB CW transceiver
HF 6m 2m SSB CW transceiver
M0DGQ
Described here is a homemade transceiver covering HF , 6m and 2m. Modes of operation are USB, LSB and CW. Power output on HF is 10W, 6m 5W and 3W on 2m.
Receiving JT65 with RTL-SDR
Receiving JT65 with RTL-SDR
LB0MG
How to receive JT-65 signals using a cheap RTL-SDR dongle with the 820T2 tuner chip
FM broadcast bug
FM broadcast bug
M0DGQ
Here is a simple FM broadcast transmitter, power output to the quarter wave antenna is less than 0.5mW so it has a range of a few tens of meters using a standard FM broadcast RX, it makes a very cheap baby monitor / bug.
Resistor Colour Code
Resistor Colour Code
MAPLIN
How to understand resistor colour codes

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