Help me boost a radio signal. Cheap.

So, my radio at work sucks. We get precisely 1.5 radio stations. The local Orlando top 40- which I'm pretty sure is outlawed for torture in rhe geneva convention, and half a classic rock station, which apparently only knows like 4 songs, when we get it at all. 

The challenge- boost my signal. I want to get the local Orlando rock station- mostly because I don't have a good way to hide a Bluetooth reciever so I can have russian deathcore Mondays, so that's out. The fm reciever is an older home unit buried way the berkeley up in the rafters of a building that once houses a good portion of splendid china, and I can't really move it. It's got a coax antenna based system, so the regular two wire hoop doesn't really fly. 

It has this plugged into it. I am radio averse, so I don't really understand what any of it does. How do I make it so my work radio sucks less? I work at a hardware store, so most homebrew solutions are available, but they have to be cheap to free. 

Cut into the coax, pull the shielding to one side. Attach the shielding to one wire and the conducting wire  to a long ass 75 ohm wire (shielding and conductor to opposite wires, of course). Run it as high as you can, considering the environment. Nice and cheap.

Height, before amplification.

Hmmm.  So FM radio signal.  How far away is the tower?

Doesn't get much simpler than a dipole:

https://www.electronics-notes.com/articles/antennas-propagation/dipole-antenna/fm-dipole-antenna.php

N Sperlo said:

Cut into the coax, pull the shielding to one side. Attach the shielding to one wire and the conducting wire  to a long ass 75 ohm wire (shielding and conductor to opposite wires, of course). Run it as high as you can, considering the environment. Nice and cheap.

Height, before amplification.

This.

A stripped coax wire makes a great antenna. It sounds like you can access the attic which would allow you to hide lots of wire up there. The more wire = more surface area of the antenna.

My first shop after I joined the military was in the sub basement of a huge command headquarters building. Since we were an electronics repair shop that dealt with ESD, there was a large copper grounding bar that ran the circumference of the entire shop. Someone figured out that if you attach the bare wire conductor to the grounding bar, you could get a great FM signal 3 stories underground. 

So.....if I borrow a 7 foot tall copper ground rod from inventory....

In reply to Mndsm :

Hole strap it to an outside wall, use a ground lug to connect the antenna wire

In reply to RevRico :

Negative on the outside wall. Has to stay indoors. Building owner might get mad. I'm planning on hiding it in the ceiling.