Are those Medivac freqs digital? Homepatrol is tied up atm with the Eastland Co. feed until I can get a splitter to tie my analog scanner in to the antenna I use for the Homepatrol. Unfortunately I have a indoor antenna because of landlord issues so my range is very limited, at least until I find a different house to rent.
Should be able to pick up the birds in the air at least though.
They are not showing to be using digital (not applied for on the license). There are several Air Evac copters in the DFW area, and none of them are using digital either.
Since they (Air Evac), and most all of the other frequencies in your area are Vhf-high, you might look at an antenna like I use when I'm out that way, a Diamond
RH77CA. Works well on Vhf & Uhf. I used this
RH789 on my HP-1 when I spent a month in the hospital. Did a better job than I expected, picking up the various trunked systems in the area. The RH789 swivels at the base, and is available with an SMA connection (for the HP-1, for example), so no adapter needed.