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You're starting to send probes and pilot-free crewed ships to far-away planets, but either your antenna isn't strong enough or you're trapped in a blind spot. Are you sick of losing contact with probes mid-mission, especially when you need it at the very moment the connection's lost? Here's how I solve my problems: ULTIMATE RELAY ANTENNA Each Ultimate is designed for maximum coverage while maximizing delta-V and minimizing production costs at the same time. Each variant is equipped with: RTGs Solar panels Different types for different variants 1 x RA-100 relay 4 x RA-15 relay Originally, the final stage of the relay was ion-powered. However, due to the engines' extremely low thrust and the inadequate solar panel performance past Dres (RTGs weren't much help either), I had to modify the design while, at the same time, maximizing delta-V. I knew the solution lay in the NERV engines, but my attempts to use four NERVs (to increase thrust) all ended up with $300K launch pad disasters. After some experimenting, I managed to find a viable solution. Below are some photos of the variant I will be using from now until further notice - like if it fails to achieve Eeloo orbit or something like that. The final stage has 3,216 m/s of delta-V. Mk. IVb at the launch pad. It has SRBs to save fuel for the initial ascent of 250 km altitude Mk. IVb immediately after launch. Those SRBs really pack a punch And that is why all Ultimate Relay variants have protective shells during the initial ascension. At that speed, the aerodynamic forces (and heat as a result of friction from air resistance) should be enough to cause a catastrophic failure if it hits unprotected crucial areas. SRBs had just been spent, which happens right before the rocket hits an apoapsis of 250 km. Any lower than that and the SRBs will mess it up - since you can't shut them of. After the parking orbit is established, the rocket should have ~2,050 m/s of delta-V left before it activates the final stage. A Mk. IV (Mk. IVb has SRBs, but a Mk. IV doesn't) Ultimate 750 km above Moho's surface. Provided I timed my transfer burn correctly, I achieved a stable orbit around Moho with ~900 m/s to spare. The best part is that the Mk. IVb costs ~$165K while my other variants cost between $225K and $310K. Feel free to use it and leave a review on this thread. Craft file for the Ultimate Mk. IVb (mods: Mechjeb): https://mega.nz/#!3KhlDILa!JaX7Ns1D9uY-oqHQHG-HnSpuU0zC5SNI31P3LnGl5Bc