My Satellite Antenna

My satellite antenna is a Moxon-Yagi dual band VHF-UHF antenna with a single feed line. This allows using a full duplex radio to simultaneously transmit in one band and receive in the other. Properly tuned, this antenna has an SWR (Standing Wave Ratio) of 1.0:1 in VHF and 1.1:1 in UHF.

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The Moxon part of this antenna is supposed to be rectangular in shape, but I soon found out that I could bend the rectangle to achieve a perfect SWR!

This antenna has been fully tested to work with satellites such as AO-91, AO-92, SO-50, IO-86, and PO-101 (Diwata 2). To learn how to access satellite repeaters, head directly to Satellite Communications.

antenna
The antenna’s boom may be split in the middle, for easy storage and transport. Note that this is an earlier photo, no bends have been made yet in the elements of the Moxon part of the antenna.

Night Sky in Focus
Astronomy and Amateur Radio
© Anthony Urbano (Manila, Philippines)

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Call Sign Plate

Each licensed amateur radio operator is awarded with a unique call sign for identification. The National Telecommunications Commission (NTC) requires radio operators to display their call sign in the vicinity of their stations. This call sign plate from the Philippine Amateur Radio Association (PARA) should look nicely when placed beside my amateur radio equipment :)

I have also received a call sign sticker set (for a car’s windshield and radio units) which I will feature in future posts.

No, you can’t use this as vanity car plate (this is a call sign plate, not a vanity car plate)

To learn more about my progress in amateur radio, click here.
© Anthony Urbano (Manila, Philippines)

Scheduled SSTV Transmissions (February 2019)

The International Space Station (ISS) is scheduled to transmit Slow Scan Television (SSTV) images this weekend, as reported in the ARISS-SSTV webpage.

Start: February 15, 8:45 UTC (February 15, 4:45 pm, Philippine Standard Time)
End: February 17, 17:25 UTC (February 18, 1:25 am, Philippine Standard Time)

All ISS passes within this period present opportunities to receive the SSTV transmissions. You can use an app called ISS Detector (for smart phones) or visit the website Heavens-Above to view upcoming passes (do not forget to set the apps to show all passes, and not just the visible ones).

To receive and decode the transmissions, you need a radio receiver capable of tuning to 145.800 MHz and a decoder app such as Robot 36.

ISS pass details (Philippine Standard Time) generated using Heavens Above

Related link: Receiving SSTV Transmissions from the International Space Station

To learn more about receiving SSTV images from the ISS, click here.
To subscribe to this site, click here.
© Anthony Urbano (Manila, Philippines)

SSTV Image from the ISS (October 29, 2018)

SSTV October 29, 2018, 241 am 4G1AWN
SSTV image received and decoded from the International Space Station (ISS) as it passes over the Philippines on October 29, 2018, around 2:41 local time

The International Space Station (ISS) has been transmitting images since October 28 and will continue to do so in the next few days. It transmits in SSTV format—the same format used to send images to Earth during the Apollo missions. The transmissions can be received with any radio tuned at 145.8 MHz, and a decoder app such as Robot 36 (try installing that app and decode this recording).

To learn more about receiving SSTV images from the ISS, click here. To learn more about my progress in amateur radio, click here© Anthony Urbano (Manila, Philippines)