My friend, 9W2AZV gave me the drawing for this 2 meter antenna, I haven’t tried building it yet. The antenna seems to share common design with a collinear antenna. I ran this schematic in MMANA-GAL and found out the antenna has a very nice flat radiation pattern which maximize the transmission reach.
Here’s the the antenna design:
Tags: amateur, amateur radio, antenna, collinear, hamradio
One brave soul (9W2PJU)has made Garmin POI of ASTRA and MARTS repeater location available via Garmin by publishing the Garmin POI file on his website. Although from what I read, some people has complaint that the location information stored in the POI is inaccurate, IMHO the exact Amateur Radio Repeater location itself isn’t that important as the information that contains its frequency, tone and shift which can be use to access the repeater.
From my observation, the POI of the Garmin does not store the exact location of the repeater (probably for security reason) but the general location of the repeater is good enough for travelers to discover new repeaters and use them while traveling to unfamiliar places, keeping in touch with fellow ham operators.
Please refer to 9W2PJU website for the latest POI files.
Tags: amateur radio, astra, garmin, GPS, hamradio, malaysia, marts, poi
Tak-Tenna is a type of compact antenna which is suitable for those who has space constraints on erecting their HF antenna. It is small enough that a 40 meter Tak-Tenna is just about the size of a 4-element Yagi 2 meter antenna. Here’s photographs of 40-meter Tak-Tenna in action. Compare that to the typical 40-meter dipole or Inverted-V configuration ! Thus it has the advantage of space-saving and unobtrusive setup when compared to other design of HF-antenna.
Tak-Tenna is available in 3 models – 40, 20, and 10 meters, with the 40 meter model can be use on 40, 30, 20, 15, and 10 meters with a tuner.
Refer to this article: “The TAK-Tenna™ Review – A Limited Space HF Antenna Review” for further review on Tak-Tenna performance and advantages.
Tak-Tenna can be ordered from the official Tak-Tenna website
Tags: amateur radio, antenna, ham, hamradio, hf, radio, tak-tenna
Here’s the simplest antenna that you can build to transmit with your HT or mobile rig when you have nothing else to rely to. The configuration gives you a 3.5dBi gain and it is simple to construct when you’re at outdoor.
I built this antenna, specially for hitting repeaters during lightning storm, as my usual high mounted antenna might attract lightning.
This antenna can be built using any conductive wire. Though, for my configuration, I use thick copper wires with the length A = 0.525m and B=0.4815m. The A-B angle is about 100-110 degree. It gives SWR 1.0 between 145.5MHz – 145.8MHz and SWR 1.3 at 148.0MHz, the edge of 2 meter amateur radio band.
Here’s a 12 Element UHF Yagi antenna that I designed for my friend, 9w2azv. He’s going to use that antenna for his client, that needs to hit a repeater 10 kilometers away from their location.
Here’s are the measurement for the antenna :
Polar Plot for the Antenna (E-Plane)
Polar Plot for the Antenna (H-Plane) at 2 Wavelength height
Here is the YagiMAX file : 10 Element Yagi 457MHz
Here’s a diagram for a simple 10m loop antenna. Although 10 meter band is not very good at this time of the year, the operating condition is predicted to be improving in the next couple of years.
Simple Antenna for 10 meter operation
A/B Value for 28.2 MHz
A = 73″
B = 146″
A/B Value for 28.5 MHz
A = 72″
B = 145 3/4″
A/B Value for 27.5555 MHz (freebander)
A = 73 1/2″
B = 150 3/4″
Data from MMANA-GAL software
The antenna can be build from Copper wire or aluminum tube.
Here’s the MMANA-GAL file for reference : 10meterloop_simple.maa
A seminar on APRS will be held in Universiti Malaysia Perlis (UniMAP) on 7 March 2009. Details of the talk as follows:
Name: Art Takahashi
Academic Qualification: Satellite Microwave System Engineer
Expert Field: Satellite communication engineer & Hamradio
Experiences: Hamradio licence holder about 40 years
Holder Radio Callsigns
PA0HMW,F0DKS,VK3PAT,VK3BFM,VK6MX,VK3EO,
P29EO,VK6MX,VK4GO,VK4GO/BD,JA1OGS
Working for NEC Japan Yokohama & Australia Papua New-Guinia
Professional Bodies Membership:
Rens & Rens , Stedehouwer NERG
The Netherland , Australia Japan
Title: A.P.R.S (Automatic Position Report System)
Synopsis:
Explain what is all about APRS, how it works and what do with it.
Main reason about my second visit is to Malaysia is to help radio amateurs in this country, to understand a other side of hobby. So they start building digital electronics project for the radio amateur hobby. (APRS)
Date: 7 march 2009
Time: 10:30 am ~ 1:30 pm the length from the seminar is depends about visitors interest.
Vanue: Lecture Hall, UniMAP Kuala Perlis.
Info Direction QRV: 9M2RMK 147.9800Mhz Shift -0.600 Tone 203.5
Info Direction on :
a) Wikimapia
b) Google Maps
Those interested to learn more about APRS technology are invited to join in the seminar. It’s free of charge!
Tags: amateur radio, aprs, ham, Ham Radio, hamradio, malaysia, radio, radio amatur, satellite, seminar, unimap
Radio Amateur Examination (RAE) results is out! Congratulations to those who have passed the examination! Heck even piju passed the test!
You can view the results here : RAE 2008-2 results from MCMC website.
Important Forms to download :
For those who didn’t pass, dont despair.. there’s plenty of time to study for the next RAE!
Tags: amateur, amateur radio, exam, ham, hamradio, malaysia, mcmc, radio, radio amateur, rae
MCMC (Malaysian Communication and Multimedia Comittee) has updated Malaysian Amateur Radio Apparatus Assignment and Callsign database, which can be viewed here – http://www.skmm.gov.my. The updated database include details of newly registered hams who’ve recently passed RAE 2008-1 examination in April.
Alternatively you could try the experimental AJAX web interface from ashamradio callsign project. Thanks to 9M2CIO for making the database available to use freely.
Tags: amateur radio, ashamradio, callsign, hamradio, mcmc
Woops, seems like the SSN (smoothed sunspot number) count for this month is equals to 0.
I only manage to make 6 contacts with DX station on 10 meter during September. Partly due to bad propagation, partly due to my busy schedule, which kinda limit my ham activities to Sundays and Saturdays.
I’ve been getting all sorts of questions about working 10 meter from fellow hams in my place. I advises them against it as the propagation right now isnt as great as couple months before
Plus, I’ve known quite few local hams that regret that they venture into 10 meter unprepared, as it requires a lot of patience and different skills to work with.
In another note, I would like to extend my warmest congratulations to those who has passed the 2008 Morse Code test, more details in 9M2MGL website
Tags: 10 meter, 28MHz, amateur, amateur radio, hamradio, Propagation
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