help or advice for Grey Ghost Amphibian Headphones for ATX

[dmnz]

: Tuesday, September 09, 2014 5:52 AM

Subject: Grey Ghost Amphibian Question


Hi there


I wonder if you can point me in the right direction.


Early this year I was in the states and purchased a Garrett Atx plus Amphibian headphones.  They are MUCH better than the standard blues in my opinion.


However, over time they developed a crackle and became very very quiet.   


I ordered a replacement set and they have arrived which is great!  I needed a backup set anyway! 


Upon arrival of the new set I looked at the older headphones that had became faulty.   As I am in NZ (and my background is electronics) I hoped to repair the phones.   It turns out there is rust in and around the potentiometer.  I removed the hot glue, - a hard job - hoping for a simple loose wired.


The pot unfortunately had leaked and may not have been 100 percent sealed from the salt water.    The piezo elements are fine.


The pot and small circuit board are fairly simple however there is a small resistor wired in parallel with the Pot that is also rusted (beyond recognition).


I wonder if anyone has a basic wiring diagram to drive the piezos? Or even a way to drive the piezo speakers on full blast without the pot.   It would be a shame to throw these away.

Received a email from Detector Pro asking me to send them back however thought I would ask anyway if anyone knows!

 

[John-Edmonton]

I graduated from specializing in electronics in high school in 1976. I know what you are talking about, but I don't have any suggestions. Have you tried calling Garrett?

 

[dmnz]

Not as yet. I will get it sorted and post the wiring diagram

 

[Barry NY]

I see you went "scubatecting"...have you submerged these headphones in the salt water?
If so, the lack of effective waterproofing in the pot area is a known defect and will quickly rust out that bit of electronics.
The same lack of waterproofing was evident in the first 1,000 unit production batch in the piezo area too - which i believe was modified on the subsequent runs.
Olde Beechnut did a mod for me that bypassed the pot for use for diving with my Excal - not sure if you can bypass for the Garrett...
A shame you have to pay for return shipping...

: Tuesday, September 09, 2014 5:52 AM

Subject: Grey Ghost Amphibian Question


Hi there


I wonder if you can point me in the right direction.


Early this year I was in the states and purchased a Garrett Atx plus Amphibian headphones.  They are MUCH better than the standard blues in my opinion.


However, over time they developed a crackle and became very very quiet.   


I ordered a replacement set and they have arrived which is great!  I needed a backup set anyway! 


Upon arrival of the new set I looked at the older headphones that had became faulty.   As I am in NZ (and my background is electronics) I hoped to repair the phones.   It turns out there is rust in and around the potentiometer.  I removed the hot glue, - a hard job - hoping for a simple loose wired.


The pot unfortunately had leaked and may not have been 100 percent sealed from the salt water.    The piezo elements are fine.


The pot and small circuit board are fairly simple however there is a small resistor wired in parallel with the Pot that is also rusted (beyond recognition).


I wonder if anyone has a basic wiring diagram to drive the piezos? Or even a way to drive the piezo speakers on full blast without the pot.   It would be a shame to throw these away.

Received a email from Detector Pro asking me to send them back however thought I would ask anyway if anyone knows!