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05-22-2018, 06:49 PM
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Join Date: Apr 2010
Location: Clinton, Indiana
Posts: 992
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Bose A20 question ?
My headset suppresses engine and other noise well as advertised. BUT, as temps rose this year and I oppend my RV10 vents, a consistent wind noise was introduced. Close the vent and it goes away. Before I consult Bose, are there any comments on this observation ?
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Larry DeCamp
RV-3B flying w/7:1 0320 / carb / Pmags / Catto 3b / digital steam
RV-4 fastback w/ Superior roller 360/AFP/G3X/CPI/Catto3b
Clinton, IN
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05-22-2018, 07:04 PM
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Join Date: May 2013
Location: Sherman, CT
Posts: 790
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Try adjusting the intercom squelch.
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Jake
RV6 #20477 completed 1991 sold.
RV7 #72018 N767T first flight 11/21/2017 350+ hrs.
IO-360M1B MT 3 blade, Dual AFS 5600 QUICK Panel.
Manual Flaps. (KOXC)Oxford, CT, (0NY0)North Creek, NY.
1941 J3 Cub skis,floats.
2020 dues gladly paid.
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05-22-2018, 07:08 PM
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Join Date: Jan 2005
Location: Georgetown, TX
Posts: 396
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Also make sure you have a good foam muff on the mike...
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Deene Ogden.
N399AD RV-12...flying
N299AD RV8 QB, IO-390X, BA prop...SOLD
N199AD One Design...SOLD
N99AD BD4, flew for 22 years...SOLD
EAA Tech Counselor/Flight Advisor
CFII, MEI, CFIG
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05-22-2018, 09:01 PM
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Join Date: Oct 2006
Location: Garden City, Tx
Posts: 5,118
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Air blowing on the mike will break the squelch every time, a good foam "sock" on the mike will do wonders, as will re-directing the airflow.
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Greg Niehues - SEL, IFR, Repairman Cert.
Garden City, TX VAF 2020 dues paid 
N16GN flying 700 hrs and counting; IO360, SDS, WWRV200, Dynon HDX, 430W
Built an off-plan RV9A with too much fuel and too much HP. Should drop dead any minute now. 
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05-23-2018, 04:37 AM
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Join Date: Nov 2008
Location: Gloversville, NY
Posts: 1,587
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You didnt say whether the noise is electronic or acoustic. If electronic, probably a squelch issue as suggested above. But if acoustic it may just be a function of the design, since the A20 electronics are aimed more at low frequency noise; high frequency noise such as wind noise not so much.
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John Peck, CFII, A&P, EAA Tech Counselor, Flight Advisor.
?Master Pilot? Award, UFO Member.
RV-12 N37JP 120176 Flying since 2012.
One Week Wonder Build Team, OSH 2018.
VAF paid through 10/2019.
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05-23-2018, 05:01 AM
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Join Date: Apr 2010
Location: Clinton, Indiana
Posts: 992
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Thanks for good ideas
The mic sock is standard issue foam.
Air flow direction could be an issue to experiment with.
I wondered about frequency range issues. I will contact Bose on that one and report back if it will benefit anyone else.
__________________
Larry DeCamp
RV-3B flying w/7:1 0320 / carb / Pmags / Catto 3b / digital steam
RV-4 fastback w/ Superior roller 360/AFP/G3X/CPI/Catto3b
Clinton, IN
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