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fin can end of the board, meaning an ideal “simple” avionics
bay for TeleMetrum should have at least 10 inches of interior length.
+ There are two generations of the TeleMetrum design. The
+ major changes in the v2 generation are:
+
+ * uBlox GPS chip certified for altitude records
+
+ * Higher power radio (40mW vs 10mW)
+
+ * APRS support
+
+ Otherwise, they're the same size, with mounting holes and
+ screw terminals in the same position.
+
=== TeleMetrum Screw Terminals
TeleMetrum has six screw terminals on the end of the board