The listing doesnt mention the gain value. When I install in on a T-Beam, do I hold it up like just another omni-directional antenna or should I get a right angle adapter?
A rigid antenna like that would be used inside a fixed enclosure of some kind, you would not be holding a device using that kind of antenna. Also, how do you know that is ‘high gain’? The only technical details listed are 915MHz and ‘do not use while overvoltage’, the connection type is not even listed but is clearly female thread.
Hmm, below is the taoglas antenna radiation pattern from the spec sheet. It looks to me like the max radiation is about 45 degrees up & down (if you position the antenna vertically) and a -10dB dip in the horizontal. That may be OK on top of a tall building or mountain or at the bottom of a valley, but not so great for flat terrain.