Category Archives: APRS

Update your APRS position via Text Msg

APRS

APRS can be confusing for a beginner and even some experts. Equipment can be found easily, but it can cost a lot to buy and piece together. Some new handhelds like the Yaesu VX-8 and some D-Star radios can do APRS positioning right out of the box, but they still cost $500+ new.

Want to post your APRS position for FREE?
Want to do it without any software to download and learn?
Want to do it anywhere?
Want to do it easily?
That’s what I was thinking too!

Introducing APRS via Text Message!

I wrote an script using Tropo, (a voice, sms, Twitter and IM cloud server) that enables you to simply send a text message to a phone number, with your callsign and position, and it will be automatically posted to the APRS network.

Want to know how to do it? I bet you do…

My 1st tower site

Farm Silo Ham Radio Antenna Site

I have been looking all over the surrounding counties, talking to local farmers, asking them if I can use their grain silos for an antenna tower site for Ham Radio use.

I talked to one generous farmer, who instantly said YES to allowing me to use his site. I didnt even need to show him the paperwork with what I wanted to do and install. He is allowing me unrestricted access to the site and the “shack” at the bottom.

It is 90′ tall, with a ground elevation of 720′. It is located on a hill of aprox 60′, so the coverage is good. The grain leg has a ladder that goes up to 3 different levels,which 2 of them are easily usable.

So far I have just installed a VHF 5/8 wave mobile antenna at the top level with 120′ of RG-8 coax. Both will be upgraded later with better equipment. For now, they will serve their purpose for scanner feeds and a APRS receiver /iGate.

Repeaters can be digipeaters too

VHF / UHF Radio Diplexer

Almost every Ham Radio club has a 2meter repeater. Lots have 440 repeaters. Only some have a APRS digipeater. If they even do have a APRS  digipeater, its almost always an afterthought and not a great setup.Why is it that the repeater gets the nice 200+ foot tower location and the digi gets the mag mount stuck on someone’s mobile home roof?

APRS Map Widget for WordPress

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APRS Map Widget for WordPress
This Plugin widget allows you to easily display your APRS location on your WordPress blog, without editing any code. Simply add your Callsign-SSID, add a title, and edit the height and width, if needed.

Digipeater Status Script

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I wrote this code so I can check the Working / Down status of my APRS Digipeater.
I have made this code very easy for anyone else to use for their systems.
It checks the Callsign-SSID on APRSsearch.net for the last status update time.
You simply need to enter the following:

  • Callsign-SSID
  • Your E-Mail info for the alert to be sent to
  • Your Working / Down time

KC8GRQ-1 APRS Digipeater

KC8GRQ-1 APRS Digipeater

 

KC8GRQ-1

This is my main digipeater. The callsign is KC8GRQ-1.
The system runs an older, but rugged Azden PCS-4000 mobile radio. I got the radio for $5 at a local swap, because the mic audio didnt work. It turns out it was just a bad mic element. It didnt matter since I dont need the mic anyways.
Its on a small 2.5 amp power supply, which is enough for the 10w output power that I have it set at.

Mobile APRS Tracker

Tower

KC8GRQ

Mobile Vehicle Tracker

GPS: Radio Shack Digitraveler

Radio: Radio Shack HTX-242 @35 watts.

APRS Encoder: TinyTrack2

Antenna: 1/4 Wave  NMO Mount, hatch mounted.

Notes: 2001 Dodge Durango