From what you described, ANY good quality indoor VHF antenna should do the job.
C. Crane recommends the Comet, but any old line brand (Winegard, Jerrold, Channel Master) should be fine. Terk seems to make a lot of cheap stuff.
I stringly second the idea of using good ol’ rabbit ears. The bigger the better. In the fancy rigs, the circles or loops are usually for UHF. That does nothing for you. Channel 6 is right in the middle of the VHF band, so you should be okay there. With rabbit ears, the higher the frequency (channel #), the smaller the length antenna.
If you have old plaster walls, brick, or concrete walls in the way, a longer line with rabbit ears and a waltz around the room to find a hot spot can work wonders.
Stay away from the signal amplifiers. They generally include things that inherently weaken the signal before it csn be amplified. Another poster pointed out that you can’t amplify what isn’t there. He’s right. Knobs and dials on the antenna also usually take more than they give. The fellow suggesting that you run a wire outside the window also has a good plan.
In the pre-digital days,
Channel 6 is actually Digital 13
I think you’re generally right about the signal amplifiers. I removed mine after getting a better antenna.
Branding 6 News
CW South Texas
(on DT2)
Slogan The station with the most local news in South Texas.
Channels Digital: 13 (VHF)
Subchannels 6.1 NBC
6.2 The CW
Owner Cordillera Communications
(KVOA Communications, Inc.)