For transmitting, there are strong requirements to make sure that an
antenna is correct (impedance, wavelength, etc.).

For receiving, it's often not that relevant.

I have an attic antenna but when I got my dtv converter the reception
wasn't as good. I simply added rabbit ears (on top of the TV, lower
than the attic antenna) and wired them together in parallel.

Unmatched impedance, not correct size for the wavelength... and my
reception vastly improved.

So give it a try.

Shaun Eli
www.BrainChampagne.com