fit inside coupler for 29mm air-frame tubing, but using it in a tube that
small in diameter may require some creativity in mounting and wiring
to succeed! The presence of an accelerometer means TeleMetrum should
- be aligned along the flight axis of the airframe, and by default the 1/4
+ be aligned along the flight axis of the airframe, and by default the ¼
wave UHF wire antenna should be on the nose-cone end of the board. The
antenna wire is about 7 inches long, and wiring for a power switch and
the e-matches for apogee and main ejection charges depart from the
in the environment and avoid having wire lengths near a
natural resonant length. Altusmetrum products transmit on the
70cm amateur band, so you should avoid lengths that are a
- simple ratio of that length; essentially any multiple of 1/4
+ simple ratio of that length; essentially any multiple of ¼
of the wavelength (17.5cm).
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