Archive for the ‘Uncategorized’ Category

A Homebrew Magic Band Beam (With an Update)

21So here I am again. Still young in the amateur radio field. I made that microphone switch and that worked wonderfully. So I decided I’d try my hand at a beam antenna.

I’m not sure what spurred my desire for a 6 meter beam, other than size, maybe. I think my first bits of material didn’t amount to enough to make a 10 meter beam, so a 6 meter would have to suffice.

The start of this project involved deciding where to get my materials. I researched all over the internet and didn’t like the cost of either a complete 6 meter beam, nor the cost of materials to make one. I mulled over materials I may have laying around and found an old deep fringe television antenna, long forgotten in the weed near the fence in the back yard.

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Amateur Radio Weekly – Issue 108

Repeater owner bans Baofeng radios
Simply put, these radios do not allow for “advancing skills in both the communication and technical phases of the art” (Part 97.1).
N4NJJ

Online streaming platform for DMR Brandmeister network
All Brandmeister Talk Groups are streamed on-demand and active participants will show up on the dashboard automatically.
Hoseline

Ladyada passes Extra exam
Ladyada took all 3 exams at once, including perfect scores.
Adafruit

Fo Time podcast is now HamRadio360
In an effort to keep it Fun, we decided to do the 50th episode with a Live Video Stream. You’ll quickly see why we do the show with audio only!
HamRadio360.com

Iridium Antenna Hack
Here’s several channels simultaneously visible in Inspectrum.
ShareBrained Technology

Hearing The Hum?
Glen set up a website where people could report what they were hearing and found that it was a worldwide phenomenon.
amateurradio.com

Learning CW is not a sprint
I am in the 9th month of my CW / Morse Code journey and I will readily admit that in my case it has been slow, steady progress rather than a sprint.
Ham Radio QRP

ESDR: New portable SDR HF transceiver
The ESDR features a large color display, digimode decoder/keyer, 2x USB ports and micro-SD card. The required supply voltage is 12.6V and the maximum output power is 30W.
QRP Blog

Differences between UV5R / UV82 series Baofengs
The UV5R, RA, RB, RC, E5, F8, GT3, etc. are all cousins.
Miklor

A lightwave adventure
VE7CNF successfully inaugurated his lightwave station earlier this week, on Monday night, completing a nice two-way CW contact between West Vancouver and Mayne Island.
VE7SL

Rare and classic shortwave QSL cards
A couple months ago at my local ham radio club meeting (the NCDXCC), my buddy Paul Greaves (W4FC) mentioned that his passion for amateur radio DXing originated with shortwave broadcaster DXing.
The SWLing Post

Video

FCC enforcement team
We got a great demonstration on how the FCC enforcement team keeps unlicensed & wireless spectrum violators at bay.
YouTube

FS 5000 receiver demo: Cold War spy radio
This is a demonstration of the receiver section of the FS-5000 cold-war shortwave spy radio, developed during the eighties by the government branch of AEG Telefunken.
YouTube

DX Sense and Nonsense

Some notes about DX chasing from both sides – written by an operator who has over 19,000 contacts in 8 years from a choice DX location, and many more thousands from the U.S.

There is no doubt that chasing, and better yet catching, DX is a fun and rewarding part of the hobby of Amateur Radio. The game is to put as many different country entries into you log as possible. However, a few inconsiderate operators can make it difficult to impossible for everyone else. In fact, a few bad operators in a country can cause a DX station to avoid working a band when it is primarily open to that country or region as has happened to Italy and Spain, to name a couple of the worst in my experience.

Of course there are many well mannered and considerate operators in both Italy and Spain, but there are a seemingly growing number of rude and overbearing operators there who poison the DXing for everyone else. For example, as a DX station I have established that I will say “QRZ” when I am finished with the previous contact. I will guarantee that if the band is open to Italy or Spain there will be from 2 to 6 or more stations calling while I am still in QSO with the previous station. Their vocal minority is just as bad about ignoring directed calls from DX stations to other parts of the world. To be fair, other parts of the world, including the United States can be just as bad.

As a DX station, I want to make as many contacts as possible so that everyone gets a chance. I have enough problems with interference of all types that I may not copy you very well. IMPORTANT: If I want anything beyond my signal report, I’ll ask. If I didn’t ask, but told you my name then an appropriate response from you is ONLY 1) signal report and 2) name. Again, if I have time to ragchew, then I’ll give more information; and more importantly I’ll ask for more info from you. Otherwise, PLEASE NOTE, you are just taking up time that I could be spending giving one or two or three more stations a DX contact.

This ragchew rule applies double or triple to the small SSB “DX Window” on 75 meter SSB. If you are stateside (or elsewhere) and operating from 3790 to 3800 (*ARRL recognized); or from 3775-3800 (recognized by the rest of IARU Region 2 and all of IARU Regions 1 & 3) then you are in the SSB DX Window. If I want the weather in New England or New York then I’ll ask. If not, please give someone else a chance at DX. And please, do not hang around to ragchew with your East Coast or Southern buddies on 75 or 40 meters just because you have sunrise. We can still hear you farther west, and you prevent us from hearing the Pacific region.

DXpeditions are some of the worst violators of common sense and courtesy in my experience. Apparently the pure difficulty of the adventure is sufficient reason to believe in your own importance. The band plans seem to have been pulled out of a hat (being nice here)! NO DX station, no matter how rare as the right to the entire band. A number of recent Dxpeditions have been on 12 meters at 24.935 and other frequencies “listening up” or “listening up 5 to 20”. Put 2 or 3 DX stations on 12 or 17 meters and there was no place for anyone else ! Don’t break your arm patting yourself on the back….give me the whole band and I can make many thousand contacts as well!

Some other DXpeditions in the past have been almost as thoughtless. It is not uncommon for a DXpedition to call CQ on 3790 say, and listen up 5 to 10! Hold on there! That’s the entire *ARRL SSB DX window for 75 meters that one station is using. A suggestion for the future: Call outside of the window and listen to a SINGLE frequency inside; or call inside the window and listen above or below the window. Or better, tx and rx outside of the window. If your are rare DX, then we’ll find you!

I have personally had to “go split” when operating in the 75 meter window from a DX location when the number of callers on my frequency prevented calling stations from hearing me. It is not unusual for me to listen outside of the ‘window’, or even down at 3745 if that happens to be an open frequency. I do not find it useful to listen “5 to 10 up/down”. If I cannot make out some calls on 1 rx frequency, then I can seldom make them out when they are spread all across the band. To each his or her own, but it does say a lot to me about operator skill.

Ten General Rules for Maximizing Your Number of DX Contacts

  1. Listen first. If you do not copy the DX station, then you will NOT work them. By calling or tuning up on frequency you may very well make my LID list though.
  2. Listen for instructions from the DX station. Are they listening “up 3” or “down 5” or “up 5 to 20 — UGH!”? Or are they ONLY listening for Europe, Asia, S. America, or another area. Don’t call if you are not in the area of the “directed call”. (see #4 below)
  3. Do NOT call when they are working another station. Even a moron can understand that this actually slows down the contact rate for everyone! And, personally I do not take or recognize “tail-enders” who call before I have finished a QSO. I always say “QRZ” when I am ready. It’s just my way of trying to bring order to chaos. ***If you ignore instructions and I copy your callsign then I will NEVER put you in the log, except maybe IW0zzz RS 00 “Lid”
  4. This is a hobby. It is NOT life and death! *Truth be known, YOU are NOT that important to get into my log, no matter where you are and no matter where I am!
  5. As a DX station I have a listed QSL Manager for a number of good reasons. If you choose to ignore that, good luck on getting a card…ever.
  6. If you are a serious DXer you probably have Internet access and access to the DX Summit spots. Please do NOT call CQ on my spotted calling or listening frequencies. What are you thinking
  7. If you are on a DXpedition and have real-time access to spots, please pick a frequency that is NOT already in use. I really don’t care what you announced LAST WEEK as “your” frequencies. **This goes double or triple for your listening frequencies — DO NOT listen on frequencies already in use. You can also ask if the frequency/frequencies are in use. See number 4 above.
  8. Keep your calls short! Timing is more important than the number of calls. I hear many stations continuing to call AFTER I have given a report to a different station and am trying to get my report.
  9. Make sure that your transmitted audio is very clean; not too low pitched and not distorted! Turning up the mic gain to drive the ALC over scale will NOT make you louder!
  10. If you can’t or won’t play by the rules, prepare to be ignored!

In the famous words of late LA resident, Rodney King, “Can’t we all just get along?”

Good DX and good luck in ham radio!

Amateur Radio Weekly – Issue 107

ISS Slow Scan TV success
This week, radio hams around the world received Slow Scan Television (SSTV) transmissions from space commemorating 15 years of Amateur Radio on the International Space Station.
Southgate

American Airlines UFO report caught on Ham Radio
The pilot reported seeing an extremely large bright object that he estimated a mile wide to his right.
Open Minds

ARES group boots storm chasers off repeater
The Wichita County ARES group had to shoo at least two storm chasers from the group’s repeater.
Times Record News

Contact with the inventor
I had the honor to meet Joe K1JT on air at 20m JT9 this evening.
PE4BAS

My first attempt at NPOTA
They were chastising me because I wasn’t on the air long enough and were upset because they were waiting for me on 40m and didn’t make enough contacts on 20m.
NT1K

Multi-band Slinky Doublet
Further research showed a single slinky can stretch to ~5m in length and contains ~20m of coiled wire.
M0SPN

29 MHz – the forgotten frequency for amateur radio satellites
Unfortunately, a 29 MHz downlink would not be practical for most of today’s very small satellites, owing to the size of the antenna required.
EE Publishers

Coax cable: It’s all in the family
Even many experienced ham operators will approach a table full of coax cable reels at a swap meet or stare at online listings and feel lost in all the options.
Off Grid Ham

The Eagle has landed
Ten-Tec Eagle — A CW masterpiece.
Ham Radio QRP

Improved GPS reception with a ground plane
It definitely helped make indoors reception in my shack much more reliable.
amateurradio.com

Thirty Minutes of Dazzle: The Sun in UHD 4K by SDO (NASA)

Take a front-seat view of the Sun in this 30-minute ultra-high definition movie in which NASA SDO gives us a stunning look at our nearest star.

This movie provides a 30-minute window to the Sun as seen by NASA’s Solar Dynamics Observatory (SDO), which measures the irradiance of the Sun that produces the ionosphere. SDO also measures the sources of that radiation and how they evolve.

SDO’s Atmospheric Imaging Assembly (AIA) captures a shot of the sun every 12 seconds in 10 different wavelengths. The images shown here are based on a wavelength of 171 angstroms, which is in the extreme ultraviolet range and shows solar material at around 600,000 Kelvin (about 1 million degrees F.) In this wavelength it is easy to see the sun’s 25-day rotation.

The distance between the SDO spacecraft and the sun varies over time. The image is, however, remarkably consistent and stable despite the fact that SDO orbits Earth at 6,876 mph and the Earth orbits the sun at 67,062 miles per hour.

Scientists study these images to better understand the complex electromagnetic system causing the constant movement on the sun, which can ultimately have an effect closer to Earth, too: Flares and another type of solar explosion called coronal mass ejections can sometimes disrupt technology in space. Moreover, studying our closest star is one way of learning about other stars in the galaxy. NASA’s Goddard Space Flight Center in Greenbelt, Maryland. built, operates, and manages the SDO spacecraft for NASA’s Science Mission Directorate in Washington, D.C.

Charged particles are created in our atmosphere by the intense X-rays produced by a solar flare. The solar wind, a continuous stream of plasma (charged particles), leaves the Sun and fills the solar system with charged particles and magnetic field. There are times when the Sun also releases billions of tons of plasma in what are called coronal mass ejections. When these enormous clouds of material or bright flashes of X-rays hit the Earth they change the upper atmosphere. It is changes like these that make space weather interesting.

Sit back and enjoy this half-hour 4k video of our Star!  Then, share.  🙂

73 dit dit

 

Amateur Radio Weekly – Issue 106

Final Days of VK0EK (ATNO Days)
One of our objectives is to give an All-Time New One (ATNO) to as many DXers as possible.
VK0EK

April 18th: World Amateur Radio Day
World Amateur Radio Day is the day when IARU Member-Societies can show our capabilities to the public and enjoy global friendship with other Amateurs worldwide.
IARU

Radio amateurs in the quest for geostationary satellites
In the next few years radio amateurs will have access to two geostationary platforms.
EE Publishers

The Doctor is In: New podcast from ARRL
Hosted by QST Editor In Chief Steve Ford, WB8IMY, the ARRL The Doctor is In podcast is a twice-monthly audio podcast that answers your questions.
ARRL

D-STAR satellite to launch from Kourou
OUFTI-1 from the University of Liege, Belgium, will be the first satellite to carry a D-STAR Digital Voice transponder.
AMSAT UK

Fuses: Make sure you can trust them
The Dollar Store fuse turns out to be the worst: running several minutes at 20A, double the rated current.
Noisebridge

Field guide to communications towers
Technically speaking, they are called Base Transmitter Stations (BTS). You might see ‘cell site’ and ‘cell tower’ used interchangeably, but these terms are not synonymous.
Hack A Day

Meteor Scatter season gets underway
Meteor Scatter season has started with the April meteor showers and will continue until the beginning of January next year.
Southgate

Morse News: Get your news the old fashioned way
It’s an application that pulls RSS feeds and translates them to Morse.
Ham Radio QRP

Video

Demolition: Voice of America Radio Towers
The final 48 “quad” towers were felled in a single explosives sequence on Monday, April 4, setting a new World Record in this category.
DCI

Rainy SO-50
From the 2016-03-27 2111Z SO-50 pass over North America.
Space Comms

Amateur Radio Weekly – Issue 105

Yaesu FT-891 – New HF/50MHz transceiver
Although the details are extremely limited, it seems we are talking about a HF/50MHz mobile radio similar with the FT-857 in size.
QRP Blog

The future of MacHamRadio.com
Popular website may close due to conflict of interest with employer.
MacHamRadio.com

ARRL tells FCC to restore balance of modes on 80 and 75 Meters
Refarming 3600 to 3650 kHz for data modes could prove to be a disincentive to General licensees to upgrade.
ARRL

Digital voice adapters for Raspberry Pi and Arduino
This is an ongoing project to develop very inexpensive hardware and software to help amateur radio folks with D-Star.
KI6ZUM

RF exposure – Evaluating your station
How do you practically conduct an RF exposure evaluation of your station?
Ham Radio School

TLF: A Linux based Ham Radio contest logger
TLF is a curses based console mode general logging and contest program for Amateur Radio.
TLF

APEX, New APRS Protocol, New Paradigm, New Software
APEX stands for “APrs EXtended”; It will be a new protocol which expands on and fixes most of the issues in the older APRS protocol while still remaining backwards compatible.
jeffreyfreeman.me

Nanocounter: Frequency Counter with an Android UI
The Nanocounter is an accurate, open source frequency counter that uses an Android phone as its display.
Hack A Day

Why you should get your Extra Class license
The Amateur Extra Class license is the highest class of license in the United States, and perhaps the world. Many hams—even hams that live outside the U.S.—aspire to pass the test and be awarded one.
Everything Ham Radio

JSatTrak: Cross-platform satellite tracking app
JSatTrak is a Satellite tracking program written in Java. It allows you to predict the position of any satellite in real time or in the past or future.
JSatTrak

New product

SharkRF: Standalone digital radio IP gateway
Connect openSPOT easily to DMR, D-Star reflectors, C4FM/System Fusion rooms, and use your radio with excellent voice quality without sync errors.
SharkRF

Video

Power outage… Zero HF noise
During a power failure I thought I would see how quiet HF can be.
Michael Carey

Power is back… And so is HF noise
The obsession with everyone (me included) to surround themselves with crappy, poorly designed electronics creates a nightmare for urban HF radio operators.
Michael Carey

and finally…

Don’t do this
Power line short circuit.
YouTube


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