The Dynell solid-state frequency converter is available in different mobile versions. The DSM 020-090-M is specially designed for the use in hangars. It can easily be moved by one person and has enough space to stow all input and output cables. The DSM 020-180-T is designed to be used on the apron. It can easily be hitched up and towed to wherever it is needed. Here too, all input and output cables can be easily stowed on the unit. In addition, all solid-state frequency converter, including the mobile versions, are available with simultaneous or non-simultaneous 28 VDC output.