Problemas para conectar un Navtex Nasa

[Perseis]

Por lo que he podido ver, existen 3 tipos de antenas Nasa para navtex:

NASA Navtex Antenna - 518khz
518khz Navtex Antenna Unit - replacement for Target receivers

NASA Navtex Antenna Early 518/490khz
518/490khz Navtex Antenna Unit - replacement for earlier dual frequency Target Pro receivers that have a frequency switch box rather than on screen switching.

NASA Navtex Antenna Series 2
518/490khz Navtex Series 2 Antenna Unit - replacement for Clipper and later Target Pro systems with on screen frequency switching.

La que necesitarias seria la del segundo modelo.