JX2Antenna CKAN

Giant 2.5m stack-mounted relay antenna with 1000G transmission power.

License: CC-BY-NC-SA

Game Version: 1.12.0

Source code: KSPSnark/JX2Antenna

Downloads: 80,516

Authors: Snark, steedcrugeon

Mod Website: Forum Thread

Followers: 220

Outdated Mod

This mod is not known to work with the latest version of Kerbal Space Program. Proceed with caution.

Information Changelog Stats

What it does

This is a giant, 2.5m stack-mounted relay antenna that provides 1000G (or, if you prefer, 1T) of transmission power (ten times the most powerful stock antenna), useful for playing with modded solar systems that include extremely distant planets.

The mod also includes two smaller 300G antennas suitable for 1.25m stacks.

The design is inspired by the JAXA Large Deployable Antenna.


Retracted, it's a cylindrical component slightly taller than the MPL science lab.

open, close


Check out this video review by Kottabos!

JU1 Medium Deployable Antenna

This 300G relay antenna is suitable for deep-space probes.


JW1 Medium Deployable Antenna

Even more compact than the JU1, this 300G relay antenna has the added bonus of rover-friendly design.



Copyright under the CC-BY-NC-SA 4.0 license, as follows:

Please see the LICENSE file included with the mod.

Why would anyone want this?

If you just play with a stock solar system in KSP, you really don't need this antenna (unless you just think it's pretty). It mainly becomes useful if you are running any mods that increase the size of the solar system, in which case the most powerful stock antennas may not reach far enough.

For example, the most powerful stock antenna is 100G, and a level-3 tracking station at KSC is 250G, for a maximum range of 158G meters from Kerbin. The farthest object of interest in the stock solar system is Eeloo, which reaches a maximum distance of 127G meters. Therefore, the stock antennas will reach.

However, some mods boost the size of the solar system considerably larger than 158G meters. Some examples:

Outer Planets attempts to deal with this by tweaking tracking station power, giving it a level-4 upgrade. However, this makes everything extremely over-powered for the inner solar system, without really adding any depth to the gameplay.

What is needed is a single, very powerful relay antenna that can fill that gap.

Compatibility with other mods

JX2Antenna includes compatibility patches for the following mods:

  • IndicatorLights: Data-transmission indicators, similar to what IndicatorLights adds to all the stock antennas.
  • Outer Planets: Undoes the tracking-station upgrade tweaks that OPM adds to the stock game.
  • Galileo's Planet Pack: Undoes the 10x power upgrade that GPP gives to the stock RA-100 and 88-88 antennas when the "largeUnmanned" tech node is unlocked.
  • RemoteTech: Makes the antenna work as a RemoteTech antenna, rather than using the stock KSP CommNet.

If you want to use these antennas with some other mod, and it needs a compatibility patch, please post in the JX2Antenna forum thread to let us know!

How to install

Unzip into your GameData folder, same as any mod.

Version 2.0.5 for Kerbal Space Program 1.12.0

Released on 2018-05-10

  • Update OPM compatibility patch to work with GEP_CommNet. Thanks OhioBob!

Download (4.20 MiB)

Version 2.0.4 for Kerbal Space Program 1.4.2

Released on 2018-04-13

  • Fix the OPM compatibility patch (again)-- it was causing NRE spam for certain other mods.

Download (4.20 MiB)

Version 2.0.3 for Kerbal Space Program 1.4.2

Released on 2018-04-12

  • Update the OPM patch, since OPM has changed how it handles antenna ranges.
  • Thanks to Benja for the heads-up!
  • DEPRECATED - DO NOT USE this version. Has a bug that breaks some mods. Use 2.0.4 or newer.

Download (4.20 MiB)

Version 2.0.2 for Kerbal Space Program 1.4.2

Released on 2017-06-25

  • Fix a bug in the model files that was causing KSP to hang on ship launch if there are more than one JX2 antenna on the ship.
  • Thanks to Chimichanga for catching this!

Download (4.20 MiB)

Version 2.0.1 for Kerbal Space Program 1.3.0

Released on 2017-06-18

  • DEPRECATED, DO NOT USE. Has a model bug that causes KSP to hang on vessel launch if there are more than one JX2 on the ship. Bug is fixed in version 2.0.2.
  • Fix a bug in the RemoteTech compatibility patch. Thanks to Starman4308 for catching!

Download (4.14 MiB)

Version 2.0 for Kerbal Space Program 1.3.0

Released on 2017-06-15

  • DEPRECATED, DO NOT USE. Has a model bug that causes KSP to hang on vessel launch if there are more than one JX2 on the ship. Bug is fixed in version 2.0.2.
  • Two new antennas! Meet the JU1 relay and the JW1 direct.
  • Texture update for the JX2. Twice the flags at no additional cost.
  • KSP 1.3 compatibility.

Download (4.14 MiB)

Version 1.1 for Kerbal Space Program 1.3.0

Released on 2017-02-09

Add a patch for Galileo's Planet Pack.

Download (3.64 MiB)

Version 1.0 for Kerbal Space Program 1.2.2

Released on 2016-12-07

Initial release.

  • Includes JX2 Large Deployable Antenna.
  • Includes patch for IndicatorLights.
  • Includes patch for RemoteTech.
  • Includes patch for OPM.

Download (3.63 MiB)

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