Oh..... I HAVE seen them. Just wondering why Skydoctor chose to upgrade with an amp instead of just moving the internal antennas to the outside of the craft. Amps generate noise, which can create further problems with RF --- I would first move the antennas externally before I add an amp...And I would still have concerns with GPS interference and heat with the internally mounted amp...As well as decreased battery life. While this is a 2w rated amp...There probably isn't enough drive from the H to reach the full 2 watts. This amp is not just boosting the RX like another user has posted here...
I Have boosted both the H and the st16/ The booster in the st16 is inside also doesnt effect flight time

