% Author: Dr. Matthias Jung, DL9MJ
% Year: 2020
\begin{tikzpicture}
    % Beschneiden
    \clip[] (-5.8,7.8) rectangle (+5.88,3);
    % Obere Skala
    \foreach \b in {-50,-49,...,50}
        \edef\c{90 - \b * 1}
        \draw[] (\c:6.5) -- (\c:6.8);
    \foreach \b in {-50,-45,...,50}
        \edef\c{90 - \b * 1}
        \draw[] (\c:6.8) -- (\c:6.9);
    \foreach \b in {-50,-40,...,50}
        \edef\c{90 - \b * 1}
        \draw[] (\c:6.9) -- (\c:7);
    \foreach \b in {-50,-40,...,50}
        \edef\c{90 - \b * 1}
        \pgfmathtruncatemacro\result{abs(\b+50)}
        \draw (\c:7.3) node[rotate=\c-90] {\footnotesize\result};
    % Kreisbogen:
    \draw[] (4.98,4.18) arc (40:140:6.5);
    \draw[double distance = \getDarcImageFactor*0.3cm,line cap=round] (4.2,3.5) arc (40:140:5.5);
    % Untere Skala:
    \foreach \b in {-30,-29,...,30}
        \edef\c{90 - \b * 1.6666666}
        \draw[] (\c:6.5) -- (\c:6.35);
    \foreach \b in {-30,-28,...,30}
        \edef\c{90 - \b * 1.6666666}
        \draw[] (\c:6.35) -- (\c:6.25);
    \foreach \b in {-30,-20,...,30}
        \edef\c{90 - \b * 1.6666666}
        \draw[] (\c:6.25) -- (\c:6.10);
    \foreach \b in {-30,-20,...,30}
        \edef\c{90 - \b * 1.6666666}
        \pgfmathtruncatemacro\result{abs((\b+30)/2)}
        \draw (\c:5.9) node[rotate=\c-90] {\footnotesize\result};
    % Zeiger:
    \draw[thick] (0,0) -- (-2.484,6.5);
    % V:
    \draw (0,3.8) node[] {\Huge{V}};
\end{tikzpicture}