Avionics-List Digest Archive

Wed 03/10/10


Total Messages Posted: 1



Today's Message Index:
----------------------
 
     1. 10:44 AM - Re: In line filter (John DeCuir)
 
 
 


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    Time: 10:44:07 AM PST US
    From: John DeCuir <jadecuir@comcast.net>
    Subject: Re: In line filter
    I had problems like yours, and I tried notch filters in the comm ant lead to no avail. I replaced comm and GPS coax with RG400 and eliminated the problem. John DeCuir RV4 > > Time: 07:05:22 AM PST US > From: Dave Lammers <davelammers@mchsi.com> > Subject: Avionics-List: In line filter > > > Hi, does anyone on the list know where to purchase an in-line (BNC/BNC) > low-pass filter to pass 243 mhz, and reject the GPS carrier of 1.5 Ghz > and above? > It turns out that my comm radio causes the ring diodes in the output of > my ELT to resonate and retransmit at frequencies that saturate and shut > down the GPS reciever front end. > I don't want to move antennas (already 4 feet apart) and think that a > simple low pass filter in the ELT antenna line will do. I can easily > make one but would rather just purchase one already packaged. > Thanks > Dave Lammers > >




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