You'll almost certainly have better success with more antenna. I know you just got that one up. It isn't all about gain, it's also about capture area. Bigger is better. Not sure what you're running for feedline either, but even LMR400 is ~1.5db/100ft. Have a look at some LDF4-50 (not superflex). It's half the loss per 100' and the knockoff stuff is $1.15/ft. The connectors are fiddly, but not hard to do. That will do more for you than any preamp, especially one on the ground. I'm in the process of taking down a Diamond X200 fed with 9913 and replacing it with an X700 and heliax.