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VHF blocks GPS signal
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- Gold Member
- Posts: 645
- Joined: Fri Nov 08, 2013 10:15 pm
- Home Port: Pender Island, BC, Canada
VHF blocks GPS signal
I have an iCom VHF radio and a Raymarine e7d multi-function GPS unit. When my VHF transmits the GPS unit loses the satellite signal. At first I thought this might be related to the antenna placement but when I disconnect the antenna and push the transmit button the problem remains so the antenna is not the problem. The GPS signal is only lost when the radio is transmitting, there is no conflict when receiving a call. Has anyone had this problem and found a solution?
Hull No. 1013, 1971
- Tree
- Gold Member
- Posts: 1615
- Joined: Fri Mar 22, 2013 12:28 pm
- Home Port: Portsmouth, UK
- Location: Bordon, UK
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Re: VHF blocks GPS signal
Additional ferrites on the cables. I had this sort of problem years ago with a nasa dsc vhf, except the gps was dulling the signal for the vhf.
Fisher Price 2
Hull Number AUL28489L900
Yanmar 6LP-STE
Built in Portsmouth RI, USA - Berthed in Portsmouth Hampshire, United Kingdom.
Hull Number AUL28489L900
Yanmar 6LP-STE
Built in Portsmouth RI, USA - Berthed in Portsmouth Hampshire, United Kingdom.
- Norseman
- Gold Member
- Posts: 1710
- Joined: Mon Jul 13, 2015 10:58 am
- Home Port: Palm Coast, Florida
- Location: Marina del Palma
- Contact:
Re: VHF blocks GPS signal
Or voltage drop when transmitting: Not enough current left for the GPS. (lose connection or a corroded connection?)
2001 28TE, 6LP-STE, 1,337 hrs, 19X18 four-blade wheel.
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- Gold Member
- Posts: 645
- Joined: Fri Nov 08, 2013 10:15 pm
- Home Port: Pender Island, BC, Canada
Re: VHF blocks GPS signal
Problem solved - sort of. I too suspected the need for a ferrite choke but the problem persisted after I installed one. I found the problem to be with an electronic device that is supposed to allow the VHF antenna to be shared with an AM/FM radio and an AIF unit. When I bypassed this unit and connected the VHF directly to the antenna the problem disappeared. Now I have to decide what to do with the AM/FM radio. I don't have AIF so that isn't a problem. Thanks for your suggestions as they were all good points.
Hull No. 1013, 1971
- catalina_mike
- Gold Member
- Posts: 721
- Joined: Mon Mar 09, 2015 11:20 am
- Home Port: Dana Point
Re: VHF blocks GPS signal
FM is so yesterday. LOL...
Silverton 2007 36C
Sold - Albin 1999 28TE
SSI Instructor 13937
SDI / TDI Instructor 18172
USCG 100 Ton near coastal
Sold - Albin 1999 28TE
SSI Instructor 13937
SDI / TDI Instructor 18172
USCG 100 Ton near coastal
- RobS
- Gold Member
- Posts: 4044
- Joined: Wed Oct 03, 2007 6:20 am
- Home Port: Center Moriches, NY
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Re: VHF blocks GPS signal
True that but it's still "free listening" .... not much left for free these days...........
Rob S.
"TENACIOUS"
1974 Chris Craft 36' Commander Tournament
Cummins 6BTA 330B's
(Former Owner)
"TOY-RIFIC" 2000 28TE, 6LP, Hull 408
Luck is the residue of good design.
"TENACIOUS"
1974 Chris Craft 36' Commander Tournament
Cummins 6BTA 330B's
(Former Owner)
"TOY-RIFIC" 2000 28TE, 6LP, Hull 408
Luck is the residue of good design.
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- Gold Member
- Posts: 2281
- Joined: Wed Nov 13, 2013 10:48 am
- Home Port: Hood Canal, WA
Re: VHF blocks GPS signal
I was going to say something like "FM is so yesterday. LOL..." but what about AM! But I didn't want to offend Mr. K., one of my heroes at AOG in the same league of the other two yokels commenting.
Hope you get it sorted, even if it means another antenna. Myself I use a retro '60s pocket transistor radio when puttering on the boat. Or my '00s retro iPod and external speaker. No, not even bluetoothed. I consider myself a trendy Luddite.
Hope you get it sorted, even if it means another antenna. Myself I use a retro '60s pocket transistor radio when puttering on the boat. Or my '00s retro iPod and external speaker. No, not even bluetoothed. I consider myself a trendy Luddite.
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- Gold Member
- Posts: 645
- Joined: Fri Nov 08, 2013 10:15 pm
- Home Port: Pender Island, BC, Canada
- Tree
- Gold Member
- Posts: 1615
- Joined: Fri Mar 22, 2013 12:28 pm
- Home Port: Portsmouth, UK
- Location: Bordon, UK
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Re: VHF blocks GPS signal
I’m clearly still young at 41. I fitted a DAB radio last year to mine.
Fisher Price 2
Hull Number AUL28489L900
Yanmar 6LP-STE
Built in Portsmouth RI, USA - Berthed in Portsmouth Hampshire, United Kingdom.
Hull Number AUL28489L900
Yanmar 6LP-STE
Built in Portsmouth RI, USA - Berthed in Portsmouth Hampshire, United Kingdom.
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- Gold Member
- Posts: 2281
- Joined: Wed Nov 13, 2013 10:48 am
- Home Port: Hood Canal, WA
Re: VHF blocks GPS signal
DAB. I had to look that up. I think I still have a crystal radio laying around in a cigar box somewhere. Hard to hear over the Volvo Penta.
- Tree
- Gold Member
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- Home Port: Portsmouth, UK
- Location: Bordon, UK
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Re: VHF blocks GPS signal
Haha I’ve had DAB in my previous and current company car and after four years of using it I couldn’t bear the drivel we have on FM here. For less than £100 it was a pretty damn good upgrade.
Fisher Price 2
Hull Number AUL28489L900
Yanmar 6LP-STE
Built in Portsmouth RI, USA - Berthed in Portsmouth Hampshire, United Kingdom.
Hull Number AUL28489L900
Yanmar 6LP-STE
Built in Portsmouth RI, USA - Berthed in Portsmouth Hampshire, United Kingdom.
- Norseman
- Gold Member
- Posts: 1710
- Joined: Mon Jul 13, 2015 10:58 am
- Home Port: Palm Coast, Florida
- Location: Marina del Palma
- Contact:
Re: VHF blocks GPS signal
That would be a splitter?. I found the problem to be with an electronic device that is supposed to allow the VHF antenna to be shared with an AM/FM radio and an AIF unit.
AIF, or AIS? If AIS is should be on it’s antenna: Never heard of a 3 way splitter: VHF, AM/FM and AIS.
I got a splitter as well, but the GPS is not involved, affected or connected: Separate antenna and power source.
2001 28TE, 6LP-STE, 1,337 hrs, 19X18 four-blade wheel.