Monthly Archives: March 2012

Track our hike in Capitol Reef National Park

Testing out my new TH-D72A in APRS mode. It looks like there should be a repeater on Mt. Ellen that will pick us up. This should start showing data points on Friday, March 9th.

Posted in B's Blog

UV3D APRS working!

My problem turned out to be power related. Whenever the TT3 would transmit, the voltage would drop to around 4.7v and it would reset. I added a LM7805 with 4 AA batteries, and it is working reliably now. I also moved it from the breadboard to a circuit board so I can test it on the highway.



Posted in N0BCB Tagged |

Wouxun UV3D APRS

Finally was able to get my homemade APRS transmitter working tonight! I’m using a Byonics TinyTrak 3 SMT TNC with a Parallax GPS, hooked to my Wouxun HT. There seems to be something weird going on with the PTT circuit that I haven’t quite figured out yet. The TT3 doesn’t always seem able to pull down the 5V PTT singnal on the handheld. I’m thinking about adding an external transistor if I can’t get it to work reliably.


Posted in N0BCB Tagged |