---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Sat 07/22/17: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 11:10 AM - 1.57542 GHz Filter (speedy11@aol.com) 2. 12:44 PM - Re: 1.57542 GHz Filter (Robert L. Nuckolls, III) 3. 07:29 PM - Re: 1.57542 GHz Filter (Alec Myers) ________________________________ Message 1 _____________________________________ Time: 11:10:54 AM PST US From: speedy11@aol.com Subject: AeroElectric-List: 1.57542 GHz Filter In the Garmin installation manual, it says the following: "The GPS antenna is lass susceptible to harmonic interference if a 1.57542 GHz filter is installed on the COM transceiver antenna output." Does anyone know of anyone who had to do this? Getting ready to install a GTN650 in my RV-8 so trying to anticipate potential problems. Thanks, Stan Sutterfield ________________________________ Message 2 _____________________________________ Time: 12:44:12 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: 1.57542 GHz Filter At 01:10 PM 7/22/2017, you wrote: >In the Garmin installation manual, it says the following: > >"The GPS antenna is lass susceptible to harmonic interference if a >1.57542 GHz filter is installed on the COM transceiver antenna output." > >Does anyone know of anyone who had to do this? > >Getting ready to install a GTN650 in my RV-8 so trying to anticipate >potential problems. > >Thanks, > >Stan Sutterfield These were found useful on some makes of comm transceivers that had unhappy amounts of harmonic radiation on or near GPS frequencies. I don't now recall the brands/models of radio involved but as I do recall, it was just a select few. Try it without the filter. It's easy to add later if indeed you do need it. It's simply inserted into the transceiver coax feedline 4-70-54-Inline-Gps-Notch-Filter-Bnc I doubt you will find it necessary. Bob . . . ________________________________ Message 3 _____________________________________ Time: 07:29:44 PM PST US From: Alec Myers Subject: Re: AeroElectric-List: 1.57542 GHz Filter I've tried the filters and they didn't make any difference. On Jul 22, 2017, at 14:10, speedy11@aol.com wrote: In the Garmin installation manual, it says the following: "The GPS antenna is lass susceptible to harmonic interference if a 1.57542 G Hz filter is installed on the COM transceiver antenna output." Does anyone know of anyone who had to do this? Getting ready to install a GTN650 in my RV-8 so trying to anticipate potenti al problems. Thanks, Stan Sutterfield ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.