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Author Topic:  Advice re repair of audio jack Minelab Koss UR30 headphones  (Read 4909 times)

Offline richo$$$

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Hi all,
I would be grateful for advice regarding repair of my Koss UR30 headphones.
The plastic at the point where the wire connects to the audio jack has split and it appears to have compromised the connection to the jack so that I'm only getting intermittent sound from the detector.
Bought the headphones via the Internet so no warranty.
Cheers, Richo

Linkback: http://forum.kimbucktwo.com/index.php?topic=26374.0
  • Detector(s) owned/used: Minelab E-Trac, Minelab Safari, Minelab Pro-Find 25, Raven Model 25.
  • Oldest find: 1879 Queen Victoria British Penny

Offline ivanll

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Offline richo$$$

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Re: Advice re repair of audio jack Minelab Koss UR30 headphones
« Reply #2 on: January 24, 2015, 10:10 »
Thanks Ivanll, looks like replacement of the plug might be the best option, thanks also for the link to Jaycar.

regards, Richo 
  • Detector(s) owned/used: Minelab E-Trac, Minelab Safari, Minelab Pro-Find 25, Raven Model 25.
  • Oldest find: 1879 Queen Victoria British Penny

Offline Rwork

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Re: Advice re repair of audio jack Minelab Koss UR30 headphones
« Reply #3 on: January 24, 2015, 11:39 »
Are you able to open the plug on your headphones or are they sealed? You will need to have the wiring the correct way round but normally only a couple of wires plus the shield or braid.
  • Detector(s) owned/used: Owned,Two Mlb 5000. Sovs,GT and XS, Ace 250's.
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Offline AngerManagement

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Re: Advice re repair of audio jack Minelab Koss UR30 headphones
« Reply #4 on: January 24, 2015, 12:25 »
Be aware that you may have to cut back a good length of cable.
See my post on Maintaining your equipment.  I have repaired a few and in most cases, by the time people start seeing OR hearing the problem.  The oxidation has travelled a good way up / along the lead...    And even where it starts to look/measure OK, I still take an extra 10 to 15 cm off.
Nothing worse than a few months down the track, having the same issue.
Correct fix, is to replace the curly cord with UV and Salt water rated cable, but is a bit costly; unless your headphones are good quality.


« Last Edit: January 24, 2015, 13:21 by AngerManagement »
  • Detector(s) owned/used: excal 1000, x-pointer, 705 ,Gamma 6000 & CTX3030
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So can I use braid and how tight should the drag be set  when Sand Fishing...

Offline richo$$$

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Re: Advice re repair of audio jack Minelab Koss UR30 headphones
« Reply #5 on: January 24, 2015, 13:00 »
Hi Rwork and AngerManagement,
Many thanks for your advice.
The plug is sealed, so will need to strip the wires back
If I bugger it up I may need to invest in the cable that AngerManagement has recommended.

cheers, Richo
  • Detector(s) owned/used: Minelab E-Trac, Minelab Safari, Minelab Pro-Find 25, Raven Model 25.
  • Oldest find: 1879 Queen Victoria British Penny

Offline Dutchy (Jarhead)

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Re: Advice re repair of audio jack Minelab Koss UR30 headphones
« Reply #6 on: January 24, 2015, 16:05 »
Been through 3 sets myself.  You would think after paying $2500 for a detector the company could supply a decent set of headphones.  My Grey Ghosts were designed for metal detectors with a L shaped connector. These cheap made Koss were designed for listening to your stereo inside a house.  Another Minelab design fault.  As I keep saying mine lab has detectors with a Ferrari engine in a Ford Fiesta body.
  • Detector(s) owned/used: Beaten up ETrac, CTX 3030, Equinox 800
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Research

Offline Rwork

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Re: Advice re repair of audio jack Minelab Koss UR30 headphones
« Reply #7 on: January 24, 2015, 16:29 »
I use the Koss 80's. Not as comfortable but seem to be better quality.
  • Detector(s) owned/used: Owned,Two Mlb 5000. Sovs,GT and XS, Ace 250's.
  • Oldest find: Ancient gold and 1797 cartwheel penny.

Offline AngerManagement

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Re: Advice re repair of audio jack Minelab Koss UR30 headphones
« Reply #8 on: January 24, 2015, 16:48 »
If you still have the dead ones... I am happy to pay postage ?

Been through 3 sets myself. You would think after paying $2500 for a detector the company could supply a decent set of headphones. My Grey Ghosts were designed for metal detectors with a L shaped connector. These cheap made Koss were designed for listening to your stereo inside a house. Another Minelab design fault. As I keep saying mine lab has detectors with a Ferrari engine in a Ford Fiesta body.
  • Detector(s) owned/used: excal 1000, x-pointer, 705 ,Gamma 6000 & CTX3030
  • Oldest find: ME


Offline Dutchy (Jarhead)

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Re: Advice re repair of audio jack Minelab Koss UR30 headphones
« Reply #9 on: January 25, 2015, 08:38 »
If you still have the dead ones... I am happy to pay postage ?

Sorry ,the 1st 2 sets went into the garbage.  Yesterday I applied some electrical tape to the connector of my 3rd set (year old) after I stared hearing the crackling sound/cutting out and noticed the exposed wires.  This is where the wires go into the large plastic bit of the jack. A stress point that a metal detecting designed headphones will address by reinforcement and/or L shaped design. 
  • Detector(s) owned/used: Beaten up ETrac, CTX 3030, Equinox 800
  • Oldest find: 1655 French coin (found in Australia)

Offline AngerManagement

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Re: Advice re repair of audio jack Minelab Koss UR30 headphones
« Reply #10 on: January 25, 2015, 11:53 »
Sorry ,the 1st 2 sets went into the garbage. Yesterday I applied some electrical tape to the connector of my 3rd set (year old) after I stared hearing the crackling sound/cutting out and noticed the exposed wires. This is where the wires go into the large plastic bit of the jack. A stress point that a metal detecting designed headphones will address by reinforcement and/or L shaped design.
YEp and if salt water / water / Moisture gets into it the wiring it will start to corrode and have a negative impact on the sounds the headphones product.

Postage is always an issue, but  if you have a quality pair of  headphones that have gone bad... 
Let me know, as a fix may be possible..

  • Detector(s) owned/used: excal 1000, x-pointer, 705 ,Gamma 6000 & CTX3030
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Offline richo$$$

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Re: Advice re repair of audio jack Minelab Koss UR30 headphones
« Reply #11 on: January 30, 2015, 19:18 »
Hi AngerManagment, this is probably a dumb question, I'm just about to attempt to replace the jack on my Koss UR 30's and am unsure which wire is ground and which is the left channel. I'm assuming the red wire is the right channel but unsure if white is ground and black the left channel. 

I'd very much appreciate your advice.

cheers richo$$$
  • Detector(s) owned/used: Minelab E-Trac, Minelab Safari, Minelab Pro-Find 25, Raven Model 25.
  • Oldest find: 1879 Queen Victoria British Penny

Offline AngerManagement

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Re: Advice re repair of audio jack Minelab Koss UR30 headphones
« Reply #12 on: January 31, 2015, 01:44 »
Will need to check as it depends on if any one has played before..
I always do as follows...
A:  Measure and check existing
B:  Clone existing and you should be OK.



Hi AngerManagment, this is probably a dumb question, I'm just about to attempt to replace the jack on my Koss UR 30's and am unsure which wire is ground and which is the left channel. I'm assuming the red wire is the right channel but unsure if white is ground and black the left channel. I'd very much appreciate your advice. cheers richo$$$
  • Detector(s) owned/used: excal 1000, x-pointer, 705 ,Gamma 6000 & CTX3030
  • Oldest find: ME

Offline Rwork

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Re: Advice re repair of audio jack Minelab Koss UR30 headphones
« Reply #13 on: January 31, 2015, 09:01 »
Borrow a multimeter and check the different circuits. If Black is the common or earth then reading from it the Ohm reading to the red and then to the white should be the same. Keep checking till you work it out.
  • Detector(s) owned/used: Owned,Two Mlb 5000. Sovs,GT and XS, Ace 250's.
  • Oldest find: Ancient gold and 1797 cartwheel penny.

Offline richo$$$

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Re: Advice re repair of audio jack Minelab Koss UR30 headphones
« Reply #14 on: January 31, 2015, 09:49 »
Hi AngerManagement, Rwork, Ivanll,

Many thanks for your advice.

I bought a replacement jack from Jaycar ($1.85) and after doing a CSI on the old jack worked out the correct wiring sequence and soldered it all back together. It now works perfectly. I also filled up the insides of the new jack with my hot glue gun to hold everything in place before screwing the cover back on.

The hardest part of the whole exercise was stripping back the three speaker wires, in the end I resorted to burning off 5 mm of the plastic. Using a soldering iron for the first time in 20 years was also a challenge!

Next time it breaks I think I'll try and get hold of an L shaped jack as per Jarhead's suggestion in an earlier post.

Once again, many thanks for the tech support.

Cheers, richo$$$
« Last Edit: January 31, 2015, 10:01 by richo$$$ »
  • Detector(s) owned/used: Minelab E-Trac, Minelab Safari, Minelab Pro-Find 25, Raven Model 25.
  • Oldest find: 1879 Queen Victoria British Penny

Offline AngerManagement

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Re: Advice re repair of audio jack Minelab Koss UR30 headphones
« Reply #15 on: January 31, 2015, 11:10 »
I do not like hot glue as it can let go and does not seal moisture out...  The commercial stuff is good but the stuff for hobbies etc is not so good.

I use some special adheasives that are non conductive and then use dual wall heat shrink; that is the ones that have an internal glue.

« Last Edit: February 01, 2015, 02:38 by AngerManagement »
  • Detector(s) owned/used: excal 1000, x-pointer, 705 ,Gamma 6000 & CTX3030
  • Oldest find: ME


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