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Offline Mike In2mud
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« Reply #10 on: February 01, 2009, 05:35:06 pm »
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Eugene52, I have just joined Thunting, but have the same question as Internet Pirate, could you help me with information on improving my Garrett Ace 250, including the tone.

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Offline Eugene52Topic starter
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« Reply #11 on: February 02, 2009, 01:21:12 pm »
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Hello Everyone , I found the schematic and the circuit board photo. I am checking if any tone mods. or depth improovements can , or have been done on this machine . The first improovement you can try is changing the search-coil  !! Try the 9 by 12 garrett pro-formance search-coil .....Also easy to take apart , if it is out of the 2 year warranty !!.........I will post later , when I find out more   ..................Regards.......Eugene52

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Offline taneycomo
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« Reply #12 on: February 02, 2009, 03:36:52 pm »
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Hi ever one, I don't know if this is the place to post my question or not so here goes, I just got my 15" coiltek, and was going to install it on my excalibur 800, but it did not come with a diagram or color code to match the 6 pin connector. Can any one help?
Thanks. Tom

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Offline Eugene52Topic starter
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« Reply #13 on: February 02, 2009, 04:27:55 pm »
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Quote:Posted by taneycomo
Hi ever one, I don't know if this is the place to post my question or not so here goes, I just got my 15" coiltek, and was going to install it on my excalibur 800, but it did not come with a diagram or color code to match the 6 pin connector. Can any one help?
Thanks. Tom


The search-coils are not cheap , I thought they came with the bag of Adapter connectors like in the photo here  !! I will try my best to find  the pin-configuration . And then you will need a Good Ohm-meter and at least minimum 30 watt soldering iron and a new waterproof connector that will fit your excalibur-800............Regards.....................Eugene52

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Offline Eugene52Topic starter
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« Reply #14 on: February 13, 2009, 12:22:47 pm »
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Hello Everyone , time to add a good modification here Today . It has been several days .............Regards..............Eugene52

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Offline rbholt80
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« Reply #15 on: February 16, 2009, 12:13:55 am »
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Im interested in the ace 250 schematic. I was going to j-tag the eprom and read the  code into my coputer and disasemble it and see if the sounds could be changed. Then reload the os into the ace 250 but I cant get any place without any info.
The coil mod would be nice to do to mine as well. any info would be great

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Offline Mike In2mud
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« Reply #16 on: February 16, 2009, 04:21:39 pm »
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I have looked inside the Ace 250 plug and it is not wired as per the drawing. there are two screened leads for the coils and one shield I presume.
The shield is on pin '5'.
A coil is wired, the inner wire to '4' and outer to '1'.
The other coil is wired, the inner wire to '3' and outer to '2'.
I imagine the orientation of the wires denotes the phase of the coils.
I have removed the shield wire and added a link accessable from the outside of the plug, in order to compare both ways round,but as yet I have not tried it.
This is the only wire that can be removed as the others connect to the coils.

all the best Mike.

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Offline rbholt80
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« Reply #17 on: February 16, 2009, 09:53:30 pm »
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I did the exact same thing last night. I used my meter to test and figured out that pin 5 was the shield. I then removed the wire. I will put a toggle switch on later to test it. Guess we think alike. hey thanks i will post my findings when I test the shielded unshielded depths.

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Offline Eugene52Topic starter
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« Reply #18 on: February 17, 2009, 10:57:29 am »
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Quote:Posted by rbholt80
I did the exact same thing last night. I used my meter to test and figured out that pin 5 was the shield. I then removed the wire. I will put a toggle switch on later to test it. Guess we think alike. hey thanks i will post my findings when I test the shielded unshielded depths.


Hello rbholt80 and everyone  , let me know if there is an improovent . If you have an oscilloscope , you will measure 30 volts peak @ 7.2 khz on the search-coils TX connector .  Anyway , while it is hooked up scroll through your different front panel mode settings and monitor the voltage changes on the coils tx . If it remains constant , than trying to change the chip-programming will not help much . You brought up some good ideas and let us know what your test results are . I will e-mail you the "ace-250 website link" if you want .  You will need to use babel-fish translation , the google translation did not work for some reason ,  only about half the words were translated !! ...........................Regards..........................Eugene52 

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« Reply #19 on: February 17, 2009, 01:21:53 pm »
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that would be great so yea mail me the link.
I do have a scope so i will look at the tx. I didnt have time last night to do anything but maybe tonight i will.  Hey thanks  Clapp

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