northwest Maintaning leads and plugs
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australian electronic gold prospecting forum.com  |  general detector and coil maintenance  |  Detector and coil maintenence  |  Topic: Maintaning leads and plugs 0 Members and 1 Guest are viewing this topic. « previous next »
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Author Topic: Maintaning leads and plugs  (Read 505 times)
Mechanic
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« on: Tuesday July 13 2010 21:23:51 AEST PM »

Hi Guys,

Leads and plugs.

Have you ever been detecting and every time you swing you get a groan? It can be very annoying! Well I have some hints and tips for you to identify the problem and repair it.

To track the source of a noise down, put the detector on stable flat ground with it ground balanced if possible. Then wriggle the leads starting from your plugs. The most common problem will be noise occurring when the coil plug is wriggled followed by the power plug. If this is of appears to be the problem get yourself a can of contact cleaner from dick smith or jaycar or other electronics supply store, spray some into the plug on the lead and in the male plug on your detector. While the cleaner is still wet, plug the lead in and out 10 or 15 times to clean the mating surfaces of your plug. Then spray with some more contact cleaner to wash the pins off.

If you have a bad connection in your coil lead, broken wire, the detector will generally not groan, but will wail and go off its head when the offending spot is wriggled. If it is near the plug end it is easily repaired. If you have the skill to operate a soldering iron you should be able to fix this yourself. Pull the plug apart and with some small pliers, hold the lead and pull on each wire to find the broken wire. The one that is broken will start to stretch, keep pulling it until the insulation breaks and the wire comes out of the lead. Then line this up on the outside of your lead and cut the lead about 20mm further back. Resolder the wires to the plug as they were and reassemble the plug. Note there is a screw in the end of the plug to hold the end in, when you remove this the end needs to be twisted a little before it will pull out.

If your lead is broken at or near the coil the coil will need to be pulled apart to fix this. I will do another article on this later.

Another source of noise is false noise(groan) when the coil is bumped. This is most likely a bad connection to the coil shielding. This will be covered in the coil repair article as well.

If the power cable is found to be faulty near the plug, repair it the same way the coil lead is repaired.

If you find that your audio is sometimes a bit scratchy it is most likely a broken wire in your headphone lead near the plug, or your power lead.

I hope you find this helpful. If anything is unclear please ask me so I can explain better. At some stage I will add some piccys too.

Cheers Mick
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owen
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« Reply #1 on: Saturday July 17 2010 20:14:03 AEST PM »

G'day mick, good post on something that we all face from time to time.

Gotta admit, when it comes to soldering, I make a great oxy welder, so how about
a few words and maybe a picture or two on what gear you use for soldering these fiddly plugs and why.

My own main problem is, keeping everything in place while soldering! ??? ;)
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dustyminer
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« Reply #2 on: Saturday July 17 2010 20:24:24 AEST PM »

HI MICK- good post on cause and affects... but like owen suggests i will be leaving the repairs to someone who knows what they are doing ;D

cheer's- dusty!! :)
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« Reply #3 on: Saturday July 17 2010 20:37:55 AEST PM »

Hi Owen,

It requires burning your fingers!! LOL I will post a few piccys of the steps involved, I just don't have any bad leads at the moment. Fixed them all about a month ago.

As far as the gear goes, I use an adjustable temperature soldering iron but any soldering iron will do as long as it has a fairly fine tip.

I will see what I can do for a demonstration next week sometime as I am away ATM.

Cheers Mick
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peterlinktech
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« Reply #4 on: Monday July 19 2010 18:20:40 AEST PM »

I have a trick that makes soldering easier, I get a big lump of Bluetack and stick it to the work bench, then  push the connectors onto it while i do the soldering.
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« Reply #5 on: Friday July 23 2010 20:14:22 AEST PM »

Hi Guys,

I have some piccys on connector cleaning.

Here is a typical dirty coil connector and it has been giving me hell!


Now I have tried spraying this with contact cleaner and mating it with the male plug, but it only improved slightly.

So you need a small screwdriver and some cotton off a cotton bud. Wrap a small amount of cotton around the screwdriver tip, just enough to touch the sides of the pin with a little bit extra.


Spray some contact cleaner on the cotton and push it into the plug and rotate the screwdriver in the direction that keeps the cotton tight. Clean each pin and if they were real dirty you may want to wrap some more cotton and do it again.


Then when it is all done.....

 Doing this made a huge difference. I can now wriggle the plug around with little to no response.



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« Reply #6 on: Friday July 23 2010 20:24:45 AEST PM »

But don't for get the male plug....


Here we have a dirty male plug.


Use a cotton tip with some contact cleaner to clean the pins. I used some small pliers as well to help push it. For the really tight spots use the screwdriver with some cotton.


And there we have a nice clean male plug.


The same goes for cleaning the power connector to for the sd and gp series. The Gpx power plugs will be harder to clean as they are smaller.

Peter that is a good idea to use the bluetack blob for soldering.

Cheers Mick

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Huego
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« Reply #7 on: Friday July 23 2010 20:33:03 AEST PM »

Great Post & Pics Mick. Well done. Very helpful info for all detectorists.

Huego  :)
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owen
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« Reply #8 on: Saturday July 24 2010 20:21:45 AEST PM »

Good work Mick, hell that connector looked like it had been buried in the ground.

I tried the bluetac idea the other day and it worked well.

Problem is I bought a new connector from jaycar and when soldering it
to the coil lead, I left the old metal outer bit on the lead and only replaced
the plastic end bit.

Then I found that the 2 bits wouldn't go together, the plastic was a couple of
 thou too big to fit the metal part. :'( ::)
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« Reply #9 on: Saturday July 24 2010 21:05:34 AEST PM »

LOL Been there done that many a time!

The ones from jaycar aren't as good as your original coil plugs. The original ones are gold plated so if you can keep them going it is better than replacing them. Good on you for having a go! You will only get better.

Cheers Mick
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owen
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« Reply #10 on: Saturday July 24 2010 22:40:48 AEST PM »

When I was trying to get the 2 parts to meet up, I noticed that it didn't look gold plated.
Last time I looked at these things in the jaycar book was a few years back and
 i'm sure they were gold plated then.

Wonder who stocks the gold plated ones?
Might have to ask one of the ebay guys who make up leads.
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Zed Troy
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« Reply #11 on: Sunday July 25 2010 14:18:49 AEST PM »

Good pictures Mick ! its amazing how dirty those plugs can get.

I like the blue tack idea too.!

I have a tip too,sometimes the noisey leads can be because of a poor sloppy contact with the pin contacts,this can be fixed by getting a very small bladed screw driver and pushing the pins a bit closer together on the female plug,but not to much though.
Wear and tear over time can slowly move these pins apart and sqeezing them back in can help with noisey leads.

Zed 
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australian electronic gold prospecting forum.com  |  general detector and coil maintenance  |  Detector and coil maintenence  |  Topic: Maintaning leads and plugs « previous next »
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