Paradar 978Mhz low-SWR tuned antenna with SMA connector for aviation, ADS-B and Software Defined Radio (SDR) - 2.5dBi

This antenna looks good, I think it's a variation on a collinear dipole (?). I haven't had a chance to test it properly yet, but pulling off the top cover it's been trimmed accurately to 66mm which is right on (two 1/8 wave segments, 978Mhz, allowing for the coax velocity) - so it should be tuned as advertised. This is pretty rare, many antennas are the closest common frequency (915Mhz?) rebadged.Construction is good - the rubber cover is very firm and the elbow is solid.