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.



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  1. Jesse September 21, 2014 at 6:47 am #

    alert, I’ll post my activation initnetons in all the usual places. But I’m also going to Self-Spot via Amateur Radio to Twitter. If you want to know more about what I’m talking about…please make sure

  2. Brian January 25, 2013 at 3:34 pm #

    Bryan, I’ve got a UV3D that does the same thing. Locks in PTT and won’t pull down. I’ve got it powered with a LM7805.

    I cant seem to figure out what’s causing it.

  3. Bryan April 29, 2012 at 8:44 am #

    So, I’ve tested both a tinytrak3 SMT and a Tinytrak4 with the Wouxun UV3D, and neither will work correctly. Once the TT keys the PTT, the TT resets itself, or the radio goes into a constant transmit. I tested both with my Kenwood D72, and they work fine. It seems like there is a problem with my particular radio, since I’ve seen others who have had success.

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