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Thread: No GS indication

  1. #1

    No GS indication

    Hi all:

    I have a 4500 installed in my RV-7 connected to a 430W via the ARINC module. I have about 125 hours on this installation and everything works great using GPS for normal navigation.

    I have a Archer VOR antenna installed in the wing tip and I seem to have good reception of VORs (about a 50 mile range). A high quality signal splitter is installed supposedly dividing the VOR signal to the VOR and GS inputs on the 430W. The other day I decided to try an ILS approach (I really can't remember testing a full ILS approach). The LOC displayed and tracked fine with a good LOC audio signal but the GS portion was flagged red and inop. I tried this at several airports and no GS was ever displayed. Is there any setup and/or configuration settings on either the 4500 or the 430W I can check?

    Doug Weiler

  2. #2
    Rather then use a splitter make your own GS antennae using a piece of coax cable. Strip the insulation and ground off about 8" of one end. This becomes the antennae. You can then attach a coax end to the other end of the cable and attach it directly to the 430GS. I put my coax through the firewall and shoved the antennae end down the front of the gear leg faring a foot or so. I get very good GS signals with this system. Works great/ light and cheap!

  3. #3
    Check the settings in the 430w for a Glide slope setting in setup. Make sure you are using a LOC/GS splitter and not a Nav splitter. Check your cable from the splitter to the GS input.
    Rob Hickman
    Advanced Flight Systems Inc.

  4. #4
    Sometimes it's the simple stuff... Bad coax connector!!

    Thanks

    Doug

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