JonC Posted August 28, 2021 Share Posted August 28, 2021 I have an antique chart plotter on my boat, I keep losing the gps signal for it. Im going to upgrade in the near future but in the meantime I want to sort it out. It receives a signal then drops it. Usually the old fashioned on/off trick sorts it out but it’s getting to be a pain. Is it likely to be the mushroom on the roof that’s dying? Do they die? Or is it more likely to be the unit itself. Also if the antenna is failing what would a suitable replacement be? Thanks Quote Link to comment Share on other sites More sharing options...
Saintly Fish Posted August 28, 2021 Share Posted August 28, 2021 How about one of these, cheap !! mick 1 Quote Link to comment Share on other sites More sharing options...
suzook12 Posted August 28, 2021 Share Posted August 28, 2021 Is the wire damaged anywhere? Not sure if they use coax or not Quote Link to comment Share on other sites More sharing options...
JonC Posted August 28, 2021 Author Share Posted August 28, 2021 27 minutes ago, Saintly Fish said: How about one of these, cheap !! Only have wooden ones unfortunately Saintly Fish 1 Quote Link to comment Share on other sites More sharing options...
JonC Posted August 28, 2021 Author Share Posted August 28, 2021 1 hour ago, suzook12 said: Is the wire damaged anywhere? Not sure if they use coax or not I can’t see any damage but it runs through some voids so can’t inspect all of it. If there was a cable broken somewhere I think it just wouldn’t work at all, it just cuts out randomly, not when the boat is moving or anything specific. Quote Link to comment Share on other sites More sharing options...
Andy135 Posted August 28, 2021 Share Posted August 28, 2021 Check the cable connections for corrosion. Might be worth running a bit of 1600 grit wet & dry over the terminals just in case. Quote Link to comment Share on other sites More sharing options...
Gordmac Posted August 29, 2021 Share Posted August 29, 2021 Can you borrow a known working one to check your antenna with? Quote Link to comment Share on other sites More sharing options...
JonC Posted August 29, 2021 Author Share Posted August 29, 2021 26 minutes ago, Gordmac said: Can you borrow a known working one to check your antenna with? 26 minutes ago, Gordmac said: Can you borrow a known working one to check your antenna with? The problem is that the unit is flush mounted overhead and the cables run all over. I have a autopilot computer that it all goes through so it’s not straight forward. What I have now done is pipe the NMEA 0183 output from my handheld vhf to the system which seems to be working. For now. Quote Link to comment Share on other sites More sharing options...
Saintly Fish Posted August 29, 2021 Share Posted August 29, 2021 2 hours ago, JonC said: I have a autopilot An mick 1 Quote Link to comment Share on other sites More sharing options...
JonC Posted August 29, 2021 Author Share Posted August 29, 2021 5 minutes ago, Saintly Fish said: An Thanks for pointing that out before ginge noticed. Quote Link to comment Share on other sites More sharing options...
Saintly Fish Posted August 29, 2021 Share Posted August 29, 2021 8 minutes ago, JonC said: Thanks for pointing that out before ginge noticed. No problem! 👍🏻 Quote Link to comment Share on other sites More sharing options...
GPSguru Posted August 29, 2021 Share Posted August 29, 2021 On 8/28/2021 at 3:56 PM, JonC said: Is it likely to be the mushroom on the roof that’s dying? Do they die? Yes, they do die, probably a bit of dampness / water ingress. Is it Nmea 2000 and plugged into the backbone ?, if yes than a replacement would be a GPS17 or GPS30 antenna. To my way of thinking, a single GPS antenna that feeds all the boat electronics is taking a risk as it is a single point of failure. On my boat I have each unit ( 2 x Garmin Echomap 97SV+, AIS800, Icom Radio, Mercury Active Trim) all using their own GPS source, but I also have a GPS17 plugged into the Nmea backbone with acts as a standby source and the AIS is set to automatically switch to it to find the best signal. Quote Link to comment Share on other sites More sharing options...
Geoff Posted August 30, 2021 Share Posted August 30, 2021 8 hours ago, GPSguru said: Yes, they do die, probably a bit of dampness / water ingress. Is it Nmea 2000 and plugged into the backbone ?, if yes than a replacement would be a GPS17 or GPS30 antenna. To my way of thinking, a single GPS antenna that feeds all the boat electronics is taking a risk as it is a single point of failure. On my boat I have each unit ( 2 x Garmin Echomap 97SV+, AIS800, Icom Radio, Mercury Active Trim) all using their own GPS source, but I also have a GPS17 plugged into the Nmea backbone with acts as a standby source and the AIS is set to automatically switch to it to find the best signal. Is that where your handle originates from? Geoff. Quote Link to comment Share on other sites More sharing options...
JonC Posted August 30, 2021 Author Share Posted August 30, 2021 8 hours ago, GPSguru said: Yes, they do die, probably a bit of dampness / water ingress. Is it Nmea 2000 and plugged into the backbone ?, if yes than a replacement would be a GPS17 or GPS30 antenna. To my way of thinking, a single GPS antenna that feeds all the boat electronics is taking a risk as it is a single point of failure. On my boat I have each unit ( 2 x Garmin Echomap 97SV+, AIS800, Icom Radio, Mercury Active Trim) all using their own GPS source, but I also have a GPS17 plugged into the Nmea backbone with acts as a standby source and the AIS is set to automatically switch to it to find the best signal. My tech is all old, it runs on nmea0183. Although it’s a fairly medieval set up it’s adequate for what I need and I have navionics as a back up. I think the head unit is from around 2005 so probably fitted to the boat from new. Quote Link to comment Share on other sites More sharing options...
GPSguru Posted August 30, 2021 Share Posted August 30, 2021 32 minutes ago, JonC said: My tech is all old, it runs on nmea0183. Although it’s a fairly medieval set up it’s adequate for what I need and I have navionics as a back up. I think the head unit is from around 2005 so probably fitted to the boat from new. The Garmin GPS17 antenna is available in both nmea0183 and nmea2000. Quote Link to comment Share on other sites More sharing options...
JonC Posted August 30, 2021 Author Share Posted August 30, 2021 2 hours ago, GPSguru said: The Garmin GPS17 antenna is available in both nmea0183 and nmea2000. Ok thanks, I’ll see if I can find one. Quote Link to comment Share on other sites More sharing options...
Saintly Fish Posted August 30, 2021 Share Posted August 30, 2021 @JonC how about this one?? It seems to fit the brief!! Quote Link to comment Share on other sites More sharing options...
JonC Posted August 30, 2021 Author Share Posted August 30, 2021 1 hour ago, Saintly Fish said: @JonC how about this one?? It seems to fit the brief!! I think that one is too/2 modern still Quote Link to comment Share on other sites More sharing options...
Saintly Fish Posted August 30, 2021 Share Posted August 30, 2021 2 hours ago, JonC said: I think that one is too/2 modern still Damn it Quote Link to comment Share on other sites More sharing options...
JonC Posted September 18, 2021 Author Share Posted September 18, 2021 @GPSguru I’m struggling to find a garmin17x in the uk and the ones I’ve seen are all around £150-200. Will a generic nmea0183 gps antenna work? There’s loads at about £50 on eBay? Quote Link to comment Share on other sites More sharing options...
GPSguru Posted September 18, 2021 Share Posted September 18, 2021 1 hour ago, JonC said: @GPSguru I’m struggling to find a garmin17x in the uk and the ones I’ve seen are all around £150-200. Will a generic nmea0183 gps antenna work? There’s loads at about £50 on eBay? Yes, it should be OK. It only needs to communicate using 2 of the nmea0183 sentence protocols. Quote Link to comment Share on other sites More sharing options...
JonC Posted September 19, 2021 Author Share Posted September 19, 2021 13 hours ago, GPSguru said: Yes, it should be OK. It only needs to communicate using 2 of the nmea0183 sentence protocols. Thanks. I’ll check the protocols, I’m good at that sort of thing! GPSguru 1 Quote Link to comment Share on other sites More sharing options...
JonC Posted October 2, 2021 Author Share Posted October 2, 2021 Fking thing Quote Link to comment Share on other sites More sharing options...
GPSguru Posted October 2, 2021 Share Posted October 2, 2021 7 minutes ago, JonC said: Fking thing ??? Tell me more, trouble mounting the new one, or trouble getting it to work ? Quote Link to comment Share on other sites More sharing options...
JonC Posted October 2, 2021 Author Share Posted October 2, 2021 Ok, @GPSguruhere’s your big opportunity to show me how clever you are. Ive bought a cheapo gps antenna as the original 17x is now discontinued, it’s wires are This is obviously totally different to the original gps17x when I look at the wiring diagram of the 2010c it looks like this so I’ve connected the new red and black cables to the power and the new green and yellow to the plotter’s green and white (nmea0183 in/out. For some reason this is knocking my sonar signal out, what could be causing this? Quote Link to comment Share on other sites More sharing options...
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