All 251's have the standard FuSpr F, the funksprechgerat (wireless-machine "F")
Installation in 'A' and early 'B' vehicles was on the right side of the co-driver. This proved not so practical. It was changed to the front of the co-driver.
It consists of several components that are connected as on this diagram.
|Antenne zuleitung||Cable to aerial|
|Gerät betriebsklar||Equipment ready for use|
|Umformer oder Wechselrichter||DC-AC converter|
|zur Spannungsquelle||to power source|