\documentclass{standalone}
\usepackage{tikz}
\usetikzlibrary{shapes.geometric}
\input{repeater}
\begin{document}
 \begin{tikzpicture}[every node/.style={scale=.8}]
  \user{U1}{0,0}{DM3MAT};
  \activerepeater{R1}{3,1}{DB0SP};
  \activerepeater{R2}{6,1}{DB0LDS};
  \activeuser{U2}{9,0}{DL2XYZ};
  \path[->] (R1) edge node[above,rotate=17] {$439.425 MHz$} (U1) ;
  \path[->,dashed] (R2) edge node[above] {via Echolink} (R1) ;	
  \path[->] (U2) edge node[above,rotate=-17] {$431.875 MHz$} (R2) ;
 \end{tikzpicture}
\end{document}
