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Amateur Radio
 

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Amateur Radio

Pixie 2: A Minimalistic QRPp CW Transceiver

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Pixie 2I remember when I was a kid, I used to enjoy listening to shortwave broadcast using an old transistor radio, and as I browse along the shortwave bands to find a clear signal and intelligible voices, I often stumbled upon some strong morse code signals. My shortwave listening hobby goes all the way through my early days of high school.

When my radio hobby surfaced again in 2009, I bought Yaesu’s VHF transceivers – VX-7R handheld portable, (which I sold already), and then I bought FT-1900R, a VHF-only transceiver. I love experimenting with it, and most actively in APRS mode, to study the propagation of low-power signal over different conditions and weather. For further experimentation, especially in HF SSB and CW, I would like to get an FT-817ND all-mode QRP transceiver or an FT-450, an HF transceiver, both from Yaesu. However, due to restricted cash, I am postponing the purchase, and prefer to try the much more primitive, and cheaper, alternative – Pixie 2, while learning morse code and wire antenna techniques.


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Last Updated on Saturday, 28 August 2010 18:22
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Setting Up APRS Station Using AGWPE

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Since its inception by Bob Bruninga in the late 1980s, APRS (Automatic Packet Reporting System) has become more and more popular among amateur radio enthusiasts, especially those who has interest on digital communication through radio waves. With APRS, all real time tactical digital information, including messages, geographic coordinates, transmitter parameters, alerts and beacons, and so on, can be shared on a local area for various purposes. With the advent of Internet, APRS network information all over the world can be gated into the Internet, ingested through APRS Internet System (APRS-IS), and distributed globally for anyone to use.

If you're about to jump into the world of APRS, here's a short basic article on what's required to set up an APRS station using your VHF transceiver and computer.


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Last Updated on Tuesday, 04 May 2010 20:41
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RF Propagation Modeling using RadioMobile

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Last week I searched Google for RF propagation modeling software to support my then-upcoming presentation to a prospective client. My intention was to compare the modeling result derived from SRTM DEM and the one derived from IFSAR DEM. I knew for sure that IFSAR will yield superior detail due to its denser posting space, however, I wanted to prove it by seeing the actual modeling result.

I tried several software, ranging from the very popular ones such as Global Mapper, ArcGIS with Spatial Analyst, to obscure ones such as Radio Mobile, Terrain Analysis Package (TAP) version 6, and online prediction tool such as CRC-COVWEB site.


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Last Updated on Friday, 16 April 2010 13:47
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My Location on Google Maps APRS

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Since March 2010 I've been experimenting with my single-band VHF radio, Yaesu FT-1900R. I've made some contacts as far as 25 km by voice, but it's very thrilling to know that I can directly reach a mountain-top digipeater 92 km away on APRS, just using 10 watts of power!

This is my location on APRS:

Have fun!


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Last Updated on Wednesday, 14 April 2010 18:51
 


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