The Tube Holder S is the mounting point for the entire line of Teltron Student ('S') Series (U18550...U18575) and related accessories, such as the Helmholtz Coils S (U185051) and Auxiliary Coil (U19106).
An easily replaceable fuse is located in the holder to protect the
valuable tubes from excessive voltage. The slots for holding coils have
metric rulings to ensure precise adjustments with a maximum spacing of
150 mm. The Auxiliary Coil can be inserted into the stepped front side
of the tube holder.