In message , Jim Lesurf
writes
In article , Woody
wrote:
One thing that everyone has missed is that DAB is vertically polarised.
Thankfully all FM transmissions in the UK are now of mixed polarisation
(i.e. they have both horizontal and vertical components) so turning
your FM aerial vertical (if necessary) will not be a problem
(electronically - might be physically!)

You beat me to commenting on the polarisations. I suspect that having a VHF
antenna 'work' for DAB may simply be using its coax as the DAB antenna
because the actual antenna is a hopeless match at DAB frequencies. :-)

Aerial impedance mismatch doesn't cause pickup on the coax. However, if
the receiver is getting a reasonable signal, it's possible that a lot of
it isn't coming from the aerial, but is being picked up on the coax.

That said, I just made a DAB antenna using two bits of wire taped to
a wooden stick. (Flower support from the garden center.) 8-]

Indeed, most true enthusiasts will have done something similar. Bamboo
canes also play an important part in such experimentation. Wire
coathangers (straightened, of course, and cut to size!) can also be used
as aerial elements.

Unfortunately, the OP hasn't come back yet to say what his present FM
aerial consists of.
--
Ian