So, I need to connect a 75 ohm feed to my 25 y/o garage shelf stereo. It has inputs for an external antenna, but they are 300 ohm. I only had a couple of the reverse adapters...300ohm screw terminals to 75 ohm F connector. So I popped one open and all it is is a choke with wire from the 2 connector types wrapped around it. Shouldn't it work in reverse as well? Just put a bullet from the feed to the adapter and then short leads from the screw terminals to the stereo?

This is connecting a TERK indoor powered antenna I have, at least temporarily til I find a decent external antenna at Goodwill or a yard sale.

I'm getting kinda tired of one classic rock, 3 talk, 3 country, and a couple of religious stations as my only options. I can pick up more in my vehicles, so I know they're out there.

 

It's actually a transformer. It converts unbalanced 75 ohm coax to balanced 300 ohms. Yes they work in either direction.