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Old 01-09-2019, 05:34 PM
Larry DeCamp's Avatar
Larry DeCamp Larry DeCamp is offline
Join Date: Apr 2010
Location: Clinton, Indiana
Posts: 831
Default Garmin 45R transponder location ?

The transponder fin antenna must be 3 from the COM antenna on the belly at the main spar. Under the baggage on the RV4 satisfies this criteria. Garmin says you need 3 minimum RG400 to the fin antanna. Rather than run all the RG 400 from the avionics shelf, why not put the transponder in the baggage bay with 3 of antenna cable ? Not trying to save cable $ but rather minimize cable exposure and corruption of other low power conducters. Comments appreciated.
Larry DeCamp
RV-3B flying w/ carb / Pmags / Catto 2b / Steam
RV-4 fastback w/ Superior XP360/AFP/G3X/CPI/Catto3b
Clinton, IN
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Old 01-09-2019, 05:57 PM
Bavafa Bavafa is offline
Join Date: Oct 2007
Location: Sacramento, CA
Posts: 2,856

I have installed mine (RV14A) right aft of baggage area for much of the same reason. It has an easy access for maintenance, helps with W&B and did best way for running the coax cable which also has a Max recommended length.
N825SM RV7A - IO360M1B - SOLD
N825MS RV14A - IO390 - Flying
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