In article , Andrew Andrew97d-
scribeth thus
How do these work if only a 6 inch stub sticks out of the roof ?

To get a decent FM signal indoors I need a dipole of some sort
that is about 59 inches long, plus reflector and director.

I ask this because I am getting interference on 88.50 Mhz
from Rowridge, but not all the time. Earlier today it
was bad, but the other BBC FM stations were not affected.

When I drove into town, FM R2 on my car radio was fine,
but I don't know what transmitter it is picking up. No
interference at all. Strange.

I am midway between IOW and Wrotham.

Ye canna screw the laws of Physics yer know whatever car stylists might
what;!.

I've got an Audi estate car thats got the radio aerial in the rear
windscreen its nowhere as good as a Quarter wave mag base aerial in the
middle of the roof. OK its sufficient for most users but its not ideal
but then again how many want an aerial in the middle of the roof;?.

As per the Bee sting aerial yes better but can be a bit directional
depending on how much of the car roof is available as a ground plane in
any direction;!..
--
Tony Sayer