Attic Installation Antenna Recommendations with High VHF in Sacramento

I decided to quit Comcast and try out OTA with an HTPC setup. I bought into the hype for the Mohu Leaf antenna and mounted it in my attic. Unfortunately, while I get all UHF channels beautifully, the main VHF channels in my area (Channel 10 being the main one I want) are spotty and video/audio hiccup about every 3-4 seconds. I have an antenna run of about 75 feet from the Mohu to a motorola signal booster to a splitter feeding one Hauppauge pvr-1800 and HDhomerun Dual.

Here is the relevant tvfool:

http://www.tvfool.com/?option=com_wrapper&Itemid=29&q=id%3dc84fd41209dd1a

My main hope is to get recommendations for an antenna that gets better high VHF, at least equivalent UHF to the Mohu, and could be carried up through the tiny entry into the attic (about 2 feet by 18 inches hole). I realize being in the attic is less than ideal, especially since the antenna has to face a junction point between the stucco exterior and an asphalt roofline. I have been looking at the RCA ANT751 or even going all the way up to the Winegard HD7694P as an option to replace the Mohu or alternatively getting a more VHF focused antenna and combining it with the Mohu UHF signal, but was wondering if anyone else has a better solution.

Thanks for any thoughts!
Edited by fmriguy - 1/10/13 at 3:40pm

Thanks, I just discovered that my amp has a remote power capability so I'll be getting the power injector adapter to make this possible. The lack of power up in the attic was the only reason I put the amp at the end of the cable run and before the splitter in the first place. I assumed it was necessary given the long cable run + splitting, but given your feedback, I will try taking the amp out altogether just to see! I am leaning toward the ANT 751 given that it's a bit cheaper than the other units and I could mount it to a rafter outside the house if the attic doesn't work out.

jimboy, that is one of my main concerns, how well the antenna will work in bad weather, we get a decent amount of fog and about 4 months of rainy weather, so I want to make sure that I have enough gain for the worst case scenario. I've actually been able to find a sweet spot in the attic for the Mohu where I get channel 10, but the signal for some UHF channels dropped in signal from 6 bars to 4 on the windows media center tuner signal meter. I think this is workable until the new antenna arrives, but I doubt it will work when rain is sheeting down outside...

Wow, the Antennacraft 22 has a boom length of 70"! It would definitely fit, but would probably end up being within a few feet of some flexible foil-insulated heating duct and about 10 feet away from the large metal shroud of the rooftop heating/cooling unit as well. Given the chance of interference, would I perhaps be better off going with a smaller antenna and mounting it further away, or would the larger HBU22 overcome these issues?

I did try the Mohu indoors, the only problem being that the TV location is in the northeast corner of the house and all of the nearby windows either face east or north, it couldn't be in a worse spot, unfortunately. The signal had to go through a stucco exterior wall and 2 lath and plaster interior walls, not to mention the house next door which is due south. I decided instead to use the existing comcast-run cable, which terminates at the southwest corner of the house to bring the antenna into the south corner of the attic (just at a high enough height that I can peek past the roofline of the neighboring house.

Thanks everyone for your recommendations, I installed the new HBU22 this weekend and removed the amplifier altogether. I'm now seeing about 80% signal and 78% signal quality on my hdhomerun tuners for the pesky channel 10. Some of the UHF channels have dropped a small amount but are generally in the 70's and 80's. I'll keep my fingers crossed for when we get some bad weather, but so far so good!