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Offline peja1207Topic starter
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« on: February 06, 2014, 02:45:18 pm »
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Is anyone building something like this.

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Offline Homefire
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« Reply #1 on: February 06, 2014, 07:59:36 pm »
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Older circuit for sure.    You can do better with better documentation on newer circuits.

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Offline peja1207Topic starter
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« Reply #2 on: February 07, 2014, 05:52:42 am »
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The problem is that I have built on this schematic and now I need help.

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« Last Edit: February 07, 2014, 05:55:00 am by peja1207 »
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Offline Homefire
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« Reply #3 on: February 07, 2014, 08:36:24 am »
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Give us a hint on what the problem is.
So?

It's built and none working?

It's built and acts weird?

We need some info here.


Posted on: February 07, 2014, 08:32:27 am
For those that can help, this is the circuit he is talking about.   

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http://www.geotech1.com/cgi-bin/pages/common/index.pl?page=metdet&file=/projects/eti1500/index.dat


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Offline nickel_n
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« Reply #4 on: February 07, 2014, 01:39:08 pm »
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Quote:Posted by peja1207
now I need help

can you give up a bit more info about the problems?
perhaps just check it again against the info that homefire provide us.looks like that its all there including test points and waveforms

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Offline peja1207Topic starter
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« Reply #5 on: February 08, 2014, 01:41:31 pm »
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Tune control will not work properly with the CA3130E.I hear sound from the headphones all the time, and when the probe is connected I hear the same. Put CA3140 detector works.
Tune control again has no function. Probe worked great in VLF detect the ring at a distance of 30 cm, in the field did not show any results.
(my english is not the best)

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« Reply #6 on: February 08, 2014, 05:06:13 pm »
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Your English is better then mine some times! LOL   Recheck your voltages on the Inputs and Amps.   Sound like it's working but just off set some place.

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Offline mayurangana
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« Reply #7 on: April 23, 2014, 09:01:43 pm »
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i hope make this detector and i think i can get help from you

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« Reply #8 on: May 11, 2014, 01:01:25 pm »
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OK so here are some basic tips

Check PCB for cracks + shorts
Check component orientation
Check component values
Check voltages at all IC's
Check all connections for errors

Regards

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So many questions so little time

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« Reply #9 on: June 08, 2014, 09:57:51 am »
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Hello

In my  opinion you have to cut the copper ground circuit, because is a short circuit ring, but that might not solve the problem, anyway go cut it . Great

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