I think your allowed quite a bit of power on the FM broadcast band without 
requiring a license to operate.
I don't now remember the limit, but it's rather high and it's allowable 
under some kind of experimental rules...
I seem to recall 50W erp?
7Watts even with a slight gain antenna isn't going to compete much with a 
10,000 watt local FM broadcast station.
That's assuming you can only put the transmitter on preset frequencies and 
not choose a locally clear frequency.

73
Colin, V A6BKX
----- Original Message ----- 
From: "Bob, K8LR" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, December 10, 2012 11:29 PM
Subject: Re: Fm transmitters


> Hi Butch,
>
> The antenna that I got with this transmitter is a simple whip antenna with 
> a
> bnc connector on it.  There are two 90 degree joints near the bottom of 
> the
> antenna that you can slide a plastic sleeve over so they won't flex. 
> There
> is also a sleeve that covers the back end of the bnc connector and the 
> lower
> end of the whip.  I've been running mine at one watt and have noticed no
> heating at all.  Be careful about the antenna you use!  This unit really
> puts out a whapping signal and I don't want to see anyone get in trouble!
>
> Bob, K8LR, [log in to unmask]
>
> ----- Original Message ----- 
> From: "Butch Bussen" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Monday, December 10, 2012 11:16 PM
> Subject: Re: Fm transmitters
>
>
> Thanks much, I'll give that a try.  Sounds like we may have the same
> Chinese transmitter.  What antenna are you using on yours?
> 73
> Butch
> WA0VJR
> Node 3148
> Wallace, ks.