Waiting to receive this item from a nice person in Arvika, this item was left by the a previous owner of a house he bought
Info from Horst on WAF:
The item is a Fu.30 a Richtgerät WWII German radio direction finder used so that the direction of a signal is correctly and accurately identified on a map. Manufactured by Ertel-Werk Munchen. Unit was battery powered and could be used at night.