Adapter Nut
Agent Sender Germany 1942

It’ s a transmitter from a very small size. It is designed so that it can be inserted
on a home receiver with a final audio tube 6F6 or 6V6. Leveraging the power of
the receiver, was inserted between the power tube and its socket. Transmitting
frequency could be selected between four fixed frequencies crystal controlled,
depending on the time of the transmission . The antenna coil as many of these
devices has three different outlets, to better fit the antenna A1 - A2 - A3.
Output power 10 W, Mode CW, frequency: 3 to 7.5 MHz.