[amsat-bb] ARR preamp modification
jefforybroughton at gmail.com
Sat Oct 31 14:35:16 UTC 2015
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
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.
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