[amsat-bb] Using a preamp on VHF

[jeffory broughton]

For those of u who are using a very hot VHF receiver like the Ic 910,mine
specs at .11 for 20db,I found the ARR preamp mast mount model to have too
much gain.
I replaced the 78l05 with a 78l033and realigned for best noise figure.
I never used the preamp because of this problem.Now when I switch the
preamp on and turn the ic 910 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.
Jeff WB8RJY

jeff broughton