I have a Telemetrum and a TeleBT, procured about 8 months ago, in preparation for an NAR L2 attempt last April. What I found was that I could talk to the TM via wired connection, and the TeleBT via wired connection, but I could never get the TeleBT to talk to the TM via the 70 cm link, despite hours and hours of attempts.
Except for one brief 10 minute session. When it came time for my L2 attempt, I made no attempt to listen to the TM reports on 70 cm, because: if I couldn't make it work in my living room after hours and hours of trying, I didn't really expect to have it work on the range. Another significant problem with the TM is that the terminal blocks have *tiny* screws. I used a Stratologger as the primary flight computer, with the TM as backup. The only flight computer failures I've had are with the TM, whose terminal blocks failed to hold the wires. To even use the terminal blocks I had to grind down a straight blade screwdriver to be small enough to fit in the holes. ----- Sorry to be a party pooper, but my experience with the TM/TeleBT has been poor; I can't recommend it to anyone. jds NAR 98570 L2 WB7NWP professor, electrical engineering, University of Washington
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