[amsat-bb] ARR preamp modification

For those of u who are using a very hot VHF receiver like the Ic 910, mine specs at .11 uv for 20 db, I found the ARR mast mount to have too much gain. I replaced the 78l05 with a 78l033 and realigned to reduce overall gain and noise figure. I never used the preamp because of this problem.Now when I switch the preamp on and turn the ATT on, I can Dig a noisy signal out of the dirt like never before. Marginal copy way down below 1 degree becomes 59 .amazing. WB8RJY JEFF

jeff broughton