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23654Re: [aprsisce] Argent Data T3-Micro Initial Look Update

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  • Rob Giuliano
    Aug 20, 2013
      Sorry to hear of the problem.  Have you contacted Argent-Data?
      I don't have any experience with it yet (plan on ordering a T3-301 to put in my FC-301 radio that currently is without one), but . . .
      Some radios supply power to speaker-mic's through the connector and that may have caused problems, especially with a PTT circuit on a common ground.
      You don't say what you connected it to (type of radio).
      Robert Giuliano


      From: KE6BB <rv6amark@...>
      To: aprsisce@yahoogroups.com
      Sent: Tuesday, August 20, 2013 1:53 PM
      Subject: [aprsisce] Argent Data T3-Micro Initial Look Update
      Anyone out there get their T3-Micro to work on RF? Mine is toast this morning. Something shorted to ground in it after I plugged the audio cable into it. Now, I cannot plug it into the USB port because it immediately gets extremely hot...too hot to touch with bare hands...even without the audio cable plugged in. Of course, it also no longer talks to the PC.

      This unit had run for 10 or so hours, but this is the first time I had the radio hooked up to it. No transmissions were made.

      I checked and rechecked the cable I made up for it, but can't find a problem. It matches the Argent Data Wiki perfectly:

      Pin Function
      Tip Audio out (to mic)
      R1 PTT (open collector)
      R2 Audio in (from speaker)
      Sleeve Ground

      That matches the schematic posted in their wiki, and the four terminal plug datasheet (SJ-43515TS). All I can chalk it up to is a static discharge through (or around the end of) the heat shrink tubing I had put on it to protect it temporarily. A metal case would have been better but would have shielded the GPS.

      It was fun while it lasted, but not $65 worth (plus the price of connectors that can actually be soldered)!


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