running GPS cable?
- Thread starter rogerroger
- Start date
rogerroger
New member
Re: Cool site!
Thank you for those kind words!
It's a Garmin antena. I considered the Furuno model which supposed to be better and certainly looks sexier but at the end of the day the 128 was cheaper.
Yup - back in the water soon... can't blumin wait.
Roger Holden
www.first-magnitude.co.uk
Thank you for those kind words!
It's a Garmin antena. I considered the Furuno model which supposed to be better and certainly looks sexier but at the end of the day the 128 was cheaper.
Yup - back in the water soon... can't blumin wait.
Roger Holden
www.first-magnitude.co.uk
rogerroger
New member
Re: CAUTION
it's a Garmin 128.
Seems like a 50 / 50 split here on whether to chop or not.
Roger Holden
www.first-magnitude.co.uk
it's a Garmin 128.
Seems like a 50 / 50 split here on whether to chop or not.
Roger Holden
www.first-magnitude.co.uk
tcm
...
Re: or piano or guitar...
not totally sure that "piano" wire goes in pianos! Spring steel, you know, the not in the least like garden wire, v hard to bend
not totally sure that "piano" wire goes in pianos! Spring steel, you know, the not in the least like garden wire, v hard to bend
LadyInBed
Well-known member
Re: Wire
You could try Picture Wire. Its quite stiff and easy to get.
You could try Picture Wire. Its quite stiff and easy to get.
LadyInBed
Well-known member
Re: standing waves
You only need to worry at this level on Transmitters. On Recevers, putting in a mismatched connector could introduce a wee bit of attenuation, but you could regain that with a shorter coax.
You only need to worry at this level on Transmitters. On Recevers, putting in a mismatched connector could introduce a wee bit of attenuation, but you could regain that with a shorter coax.
EdEssery
Member
Vacuum Cleaner...
Someone told me the way to get a wire through something like a pushpit/pulpit is with a vacuum cleaner and a piece of thread.
Connect the hose of the vacuum cleaner over the hole at one end with tape, ensuring it is air tight. Turn on vacuum cleaner and feed thread in at other end. Remove vacuum cleaner and use thread to pull through string, string to pull through cord and cord to pull through wire. Voila!
Sounds good in theory but haven't tried it yet - got a spare pulpit in the garage awaiting attention on a rainy weekend. Perhaps this one given the forecast!
Ed
Someone told me the way to get a wire through something like a pushpit/pulpit is with a vacuum cleaner and a piece of thread.
Connect the hose of the vacuum cleaner over the hole at one end with tape, ensuring it is air tight. Turn on vacuum cleaner and feed thread in at other end. Remove vacuum cleaner and use thread to pull through string, string to pull through cord and cord to pull through wire. Voila!
Sounds good in theory but haven't tried it yet - got a spare pulpit in the garage awaiting attention on a rainy weekend. Perhaps this one given the forecast!
Ed
G
Guest
Guest
ASK GARMIN if its alright to cut the cable ? nm
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HaraldS
New member
Re: Vacuum Cleaner...
Works fine. Have been doing this on my house for computer cabling. Took a small piece of styrofoam on a thin fishing line.
Works fine. Have been doing this on my house for computer cabling. Took a small piece of styrofoam on a thin fishing line.
Col
New member
Re: Vacuum Cleaner...
That springy wire that you use for net curtains works well.
That springy wire that you use for net curtains works well.
brian_neale
New member
Re: ASK GARMIN if its alright to cut the cable ? nm
At GPS satellite frequencies, cable length is unlikely to be an issue (unlike the cable on echo sounder transducers where the original length is critical). If the antenna is active (i.e. some circuitry other than the antenna itself) then it may have 12V fed up the cable as well, but this should not make any difference. Cutting and rejoining with a good quality connector should be fine.
Take a look at www.indexmarine.co.uk. They do a couple of gland plus connector kits for just this kind of job. The one with PL259 connectors is OK for a VHF radio, but for GPS I would prefer the more expensive one with a BNC connector. Fiddly soldering, though, and it does need to be done reasonably tidily. Someone also makes a waterproof coax connector designed for deck mounting. I have one on my current boat but cannot remember where I bought it. Good quality coax connector with waterproof shroud to which I added self-amalgamating tape.
At GPS satellite frequencies, cable length is unlikely to be an issue (unlike the cable on echo sounder transducers where the original length is critical). If the antenna is active (i.e. some circuitry other than the antenna itself) then it may have 12V fed up the cable as well, but this should not make any difference. Cutting and rejoining with a good quality connector should be fine.
Take a look at www.indexmarine.co.uk. They do a couple of gland plus connector kits for just this kind of job. The one with PL259 connectors is OK for a VHF radio, but for GPS I would prefer the more expensive one with a BNC connector. Fiddly soldering, though, and it does need to be done reasonably tidily. Someone also makes a waterproof coax connector designed for deck mounting. I have one on my current boat but cannot remember where I bought it. Good quality coax connector with waterproof shroud to which I added self-amalgamating tape.
bedouin
Well-known member
Re: standing waves
It's not quite that simple, the problem of attenuation is not about resistance, but about characteristic impedance (i.e. the theoretical impedance of an infinite length of the carrier). Significant differences of characteristic impedance can result in a lot of the energy being reflected back rather than being propagated.
Any small well-made connection should not cause much problem; however I would be very concerned about any form of tarnishing which could add all sorts of stray capacitance, resistance (and some would say semi-conducting junctions) into the equation.
It's not quite that simple, the problem of attenuation is not about resistance, but about characteristic impedance (i.e. the theoretical impedance of an infinite length of the carrier). Significant differences of characteristic impedance can result in a lot of the energy being reflected back rather than being propagated.
Any small well-made connection should not cause much problem; however I would be very concerned about any form of tarnishing which could add all sorts of stray capacitance, resistance (and some would say semi-conducting junctions) into the equation.
LadyInBed
Well-known member
Re: resistance
I don’t think I mentioned resistance!
VI Cos Ø to you ;-)
I don’t think I mentioned resistance!
VI Cos Ø to you ;-)
ArthurWood
New member
Re: Website
Roger - You might not be very bright when it comes to wiring GPS cable, but your site is great and I really enjoyed the videos. But I see you are an internet consultant, so you should be good!! Tried to sign your logbook but got server error. When you have a few weeks to spare and you seem to have many at 4kt, you might let me know how to get video clips on the web - or can to point me to reference/primer?
Roger - You might not be very bright when it comes to wiring GPS cable, but your site is great and I really enjoyed the videos. But I see you are an internet consultant, so you should be good!! Tried to sign your logbook but got server error. When you have a few weeks to spare and you seem to have many at 4kt, you might let me know how to get video clips on the web - or can to point me to reference/primer?
