simple FM converter

[vintagecollect]

Got a great simple converter for my Philco Prewar FM radio. Buy a FM converter from fleabay, converts 76 to 90MHZ to 88 to 108MHZ. Is active and needs a 9V battery and 9V clip for power.
Male has two leads,converter male leads to the two FM radio terminals, and ground lead also used for 9V power.

Female lead I used only inside connector for antenna w/ 4 foot wire. Using both parts of female connector OR longer wire will probaly help. WORKS great, listening to it now. Stronger stations seem to be picked up as multiple harmonics, have not tried longer antenna OR both female leads as antenna.