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VHF and stereo? Help

Old 03-02-2013, 07:40 PM
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Default VHF and stereo? Help

In my console box I have a icom VHF and a av stereo mounted. When I key up the mic the led screen on the radio goes blank like it it getting interference and does not come back on. The radio still works perfect but the led screen is out. I have to turn it off and back on to get the led screen back.

I a am running a splitter to the antenna for the radio and the VHF to use the same antenna. When I pulled the units down away from the splitter they work just fine. When I mount them back up in the box same thing happens. Could the splitter be causing this? What gives?
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Old 03-02-2013, 08:57 PM
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Does it happen in the box whether the stereo is on or off?
When it didn't happen outside of the box, was the splitter still hooked up to both radios and the radios at least as close to each other as in the box and stereo still on?

I'd try disconnecting the vhf antenna from the splitter and reconnecting directly to the VHF while VHF and stereo are installed in usual position in the box and both turned on. Does the display then stay on when the mic is keyed?


Are either the VHF's ant. coax & PL-259 , or its' 12v power cord stressed when the VHF is mounted in the box?

My suspicion would be that the splitter might be too close to the VHF and when the mic is keyed some of the transmission signal is being lost and radiated at the splitter connections or internal board and reflecting back to effect the VHF. But I would have expected possible squeal before display-blanking, so it might be worth wiggling or straightening those cables and connectors, or rearranging the units in the box for reater VHf separation.

But i think most would suggest the likely best move for optimum & most reliable VHF performance is 86 the splitter and add a little SS whip for the stereo. That also provides a backup antenna for the VHF.
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Old 03-03-2013, 01:25 PM
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Thanks for the info. Ended up being the splitter.
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Old 03-04-2013, 09:05 AM
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Hi-Jack
I have a different problem. My radio stays on, but the speakers only work when the VHF is keyed? The VHF still sends and receives signals fine the entire time.This is true if I use the radio or a SD card to play music so I don't think it's the radio antenna. Radio is wired to a switch on the console and VHF is wired to the panel feeding the switches. It worked fine before but crapped out on my last fishing trip.

Havn't had time to monkey with it yet but was wondering if anyone else has had this problem?
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Old 03-05-2013, 06:02 PM
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No ideas. Guess I learned my lesson about hijacking threads :-(
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Old 03-06-2013, 04:14 AM
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Start with checking all of your connections.
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