Thanks for the replies.
No, the Terk is actually in an upstairs bedroom, pointed toward a window that generally faces the transmitters. If it weren't for the one VHF Hi station I can't get, I'd probably keep it.
No major structures within several miles and I should have enough room in the attic for the HBU33, but I'll need to get up there and measure to be sure. If the HBU33 ends up being too big, are there any smaller antennas you'd recommend? Since the signal is relatively strong, maybe I don't need something that big.
I'd considered the
HBU22, the
Antennas Direct C2-V-CJM and the
RCA ANT751 as well, but wasn't sure they'd be enough to pick up all the stations in green. I was told that you lose half the stated range if installed in an attic as opposed to the roof.
Thanks for the input on the preamp. I'll try without first.