Need pinout coil in pcb whites coil gmt gold master

[hooby life]

Thanks mr carl . I think there are Diffirance in africa version of gmt gold master e series .in main board and coil .

[hooby life]

https://www.detectorprospector.com/f...ters/#comments

[hooby life]

https://www.detectorprospector.com/m...r-gmt-rebuild/

[hooby life]

The same with coil connector

[kt315]

The same with coil connector
[ATTACH]55959[/ATTACH]

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[Carl-NC]

Thanks mr carl . I think there are Diffirance in africa version of gmt gold master e series .in main board and coil .

No, same circuit & coil, except for a while the 5.3 was unique to Africa.

[hooby life]

Hello mr this is coil inductance .

Whay the tx is 90ohm ?

[kt315]

use thermo fan air desolder gun for the whites yellow glue deleting. you will find some components... there might be 'capacitors and a resistor' inside invisible for you.
do some research of coil, because it is in YOUR hands, not mine.
maybe this https://www.youtube.com/watch?v=hLbDUdaFWKA

[hooby life]

use thermo fan air desolder gun for the whites yellow glue deleting. you will find some components... there might be 'capacitors and a resistor' inside invisible for you.
do some research of coil, because it is in YOUR hands, not mine.
maybe this https://www.youtube.com/watch?v=hLbDUdaFWKA

Thanks kt15 my be later . I will try that later . I want to make a large coil for this unit but what about components inside the coil ? The same or not ?

[Altra]

To add to Carl's post 5

Notes I made from a Whites GMT eliptical coil

Tx freq 47.6khz

RX 3.0mh 16ohm
RX PIN 1 clear center
RX PIN2 shield

TX 2.75uh 2.55ohm
TX Pin 3 shield
TX PIN 4 red center

In parrallel with TX coil is 33nf + 2.2nf + 470pf.
Not sure if each coil was custom tunned or all coils had these values?

[hooby life]

Thanks
Have you inner or instruction to diy 14 " .10" .or 18" coil

[kt315]

To add to Carl's post 5

Notes I made from a Whites GMT eliptical coil

Tx freq 47.6khz

RX 3.0mh 16ohm
RX PIN 1 clear center
RX PIN2 shield

TX 2.75uh 2.55ohm
TX Pin 3 shield
TX PIN 4 red center

In parrallel with TX coil is 33nf + 2.2nf + 470pf.
Not sure if each coil was custom tunned or all coils had these values?

yes, custom tuned of TX coil sure to 48kHz. those additional '2.2nF + 470pF' are set just for accuracy of the tuning in resonance.
anotherway you get a distortion of TX signal.
the forum has the data of coils. a pic.

[Melbeta]

Hmmmm! The material (KT315) posted is accurate with Whites factory material... I was not aware it (48 KHz coil data) was out in the internet! KT315 posted material has additional data added to Whites factory material. Now factory original material was drawn by unknown Whites engineer, who I believe was John Earle him self! John Earle back then had left Compass Electronics before its demise, after creating Compass Electronics models AU52, AU2000, Gold Scanner Pro, and Gold Scanner units, and then became Chief Engineer for Whites Electronics.

Thumbs up KT315! It has added to Whites Electronics factory drawing more excellence...
Melbeta

[hooby life]

Thanks to all .

[hooby life]

To add to Carl's post 5

Notes I made from a Whites GMT eliptical coil

Tx freq 47.6khz

RX 3.0mh 16ohm
RX PIN 1 clear center
RX PIN2 shield

TX 2.75uh 2.55ohm
TX Pin 3 shield
TX PIN 4 red center

In parrallel with TX coil is 33nf + 2.2nf + 470pf.
Not sure if each coil was custom tunned or all coils had these values?

Hi altra did tx is 2.75 uh . Or 275 uh ? And what sp?cification of tx insid ?
And my coil is only 33 nf +2.2nf
And risistor between tx outsid and tx insid .