2 boxxxx :)

[Geo]

Hi KT315,

Short question.... What is the purpose of the polarity switch? Why is it useful for operating the TR-Locator?

Chris

I made the same question to sevzirfo. He told me that there is not purpose. Only for connecting the meter with any polarity. So you can delete the switch the diode and the capacitor and to make it fix

[kt315]

What is the purpose of the polarity switch?

hello Chris.
1. because the schematic is very simple and there is not a part for good compensation of permanent signal on amplitude and mainly on phase sign. in your concrete construction you may get the phase (+) with some value, and another device will have the phase (-) thus Ivan did try to kill the problem connected the polarity switch. so you must elect (at field) what polarity is best on reaction on metall in your concrete case.
2. ... or do you prefer to copy the TM-808?

Only for connecting the meter with any polarity.

note pls, the meter on schematic is with ZERO in middle of the scale.

[Chris2]

Hi Geo, KT315,

thanks for your reply. I would like to make the TM808, but it's quite a big project. I think I start first to make the TR Locator. It looks much simpler and parts are easy to find here at local shops.

Chris

[chemelec]

PCB Artwork

I Re-Did the PCB artwork using the Overlay, so it might be easier for others to Duplicate it. Hopefully its Correct.

[nelson]

TR Locator

Hi KT315 and thanks for the corrected schematic.
The detector circuit is almost finish, but i found one more problem. U2 (4049), is a 16 pin IC, and the schematic show that this is a 14 pin IC.
Looking the PCB from Sprint Layout, it saids that is a 14 pin IC.
Can you help me with this?
I read data sheets for 4049 and all saids that is a 14 pin IC.
Please help me.
Regards
Nelson

revised schematic (for geotech).

[kt315]

The detector circuit is almost finish, but i found one more problem. U2 (4049), is a 16 pin IC, and the schematic show that this is a 14 pin IC.

good question Nelson! you are right. this problem is because Ivan takes IC's model from ORCAD library and does not the correction. a main his target is to speedy demonstrate the schematic and that's all but really he uses analog IC (in our electronic world) K561LN2 in DIP-14 on layout. not the 4049 in DIP-16! so K561LN2 is really full analog of 4069. 4049 and 4069 has different pins' basing but functionally equivalently. please allow this, compare the datasheets, and look attached photo.
regards.

[nelson]

TR locator

To bad to hear that.
Ok, i think this it´s gona be more work trying to find the correct IC.
I was looking data sheets of CD4049 and CD4069. Aside the number of pins, everything looks like the CD4069 has everything inverted. My knolegment of electronics is very limited, so if you can help me, i request a copy of datasheet for KT561LN2 in 14 DIP version.
If anyone can help, please let me know how to proceed. Should i have to do mods to my PCB.
Here i can get CD4069, but i´m not shure if it will work. First view is telling me that it won´t work.
My work has almost finish, but this thing is real rock on my way...so please help me with this.
Regards
Nelson

The detector circuit is almost finish, but i found one more problem. U2 (4049), is a 16 pin IC, and the schematic show that this is a 14 pin IC.

good question Nelson! you are right. this problem is because Ivan takes IC's model from ORCAD library and does not the correction. a main his target is to speedy demonstrate the schematic and that's all but really he uses analog IC (in our electronic world) K561LN2 in DIP-14 on layout. not the 4049 in DIP-16! so K561LN2 is really full analog of 4069. 4049 and 4069 has different pins' basing but functionally equivalently. please allow this, compare the datasheets, and look attached photo.
regards.

[goldfinder]

Ans for Detectorman re Goldfinger

Hi Detectoman,
I appologize for not answering you regarding your question sometime back my email name "Goldfinder". You had mispelled it as "Goldfinger" -

From Wikopedia:
Goldfinger is the seventh novel in Ian Fleming's James Bond series. First published by Jonathan Cape on March 23, 1959.
In 1964 it was adapted as the third film in the EON Productions James Bond series and was the third to star Sean Connery as British Secret Service agent, Commander James Bond. .. the villain of the novel, Auric Goldfinger. ... is the world's top gold smuggler, the richest man in England.

My email name is GoldFINDER as in "a person who finds Gold" = all our wishes is to find lots of Gold. Then we will be as rich as goldFINGER!

GoldFINDER

[goldfinder]

Coils for Servizo's TR Locator

Question for KT318 - You had mentioned in a previous post Coils are

"D-38 cm, 150 turns, D wire-0,4 mm. Voltage amplitude on TX coil is 120 V*"

Is this the old standard 2-box from long ago? Or the specs on the large circular coils used to find the old artillerly shells you showed in the pictures that "Ivan" made? The circular coils in the pictures looked to be larger than 38 cm in diameter.

Thank you for all your help in previous post. I enjoy reading your matter of fact observations.

Any help on the coils would be appreciated.

Best Regards,
Goldfinder

[chemelec]

Question for KT318 - You had mentioned in a previous post Coils are

"D-38 cm, 150 turns, D wire-0,4 mm. Voltage amplitude on TX coil is 120 V*"

Is this the old standard 2-box from long ago? Or the specs on the large circular coils used to find the old artillerly shells you showed in the pictures that "Ivan" made? The circular coils in the pictures looked to be larger than 38 cm in diameter.

Thank you for all your help in previous post. I enjoy reading your matter of fact observations.

Any help on the coils would be appreciated.

Best Regards,
Goldfinder

I Really Doubt that the coils are very Critical in either construction, diameter or wire size.

If you have noticed that you need to Tune them using a 0.4uH Capacitor. (Or as it reallys says: a Multiple of smaller caps to make a value that tunes the coils correctly.)

So if your completed coils are somewhat a Different inductance, than a different capacitance will correct it to aresonant frequency.

[detectoman]

ok golfinder
traduction for babel fish
hi goldfinder, your nick is in spanish: buscador de oro, o encontrador de oro, I request excuses to you, by my mistake, and by it not to have done then, him control a hug and I offer my hand to you in a greeting thanks to accept my excuses
best regards
detectoman mexico

[detectoman]

thanks kt 315

very thanks in special to afiction brother, kt 315 for your profesionals directions,and you nice
atention for we in these projects on two box, thanks very much thanks kt315

detectoman mexico

[Geo]

To bad to hear that.
Ok, i think this it´s gona be more work trying to find the correct IC.
I was looking data sheets of CD4049 and CD4069. Aside the number of pins, everything looks like the CD4069 has everything inverted. My knolegment of electronics is very limited, so if you can help me, i request a copy of datasheet for KT561LN2 in 14 DIP version.
If anyone can help, please let me know how to proceed. Should i have to do mods to my PCB.
Here i can get CD4069, but i´m not shure if it will work. First view is telling me that it won´t work.
My work has almost finish, but this thing is real rock on my way...so please help me with this.
Regards
Nelson

Hi Nelson. There is not problem, just little work more. Take a small pcb, put 7+7 pins, put the 4049 and connect the pins of 4049 at the pins of pcb so to match with the pcb of T/R locator.

[kt315]

hi Nelson and all. you must not be embarrassed. this mistake, I mean anyone can expects that K561LN2=4049, are repeated in all reference books in russian. but really K561LN2=4069. if you do not want to correct PCB then you can order 4069. I wrote about the mistake in forum of Ivan, but you may be know that when people married they disappear from WWW on very time I hope Ivan will be back...
... I must also note for all that main difficulties will be for you the tuning of contours in resonanse (then you can get maximum possible reply reaction on metall). you must do prelimenary tuning in your room (I hope your working place is not kitchen) but final tuning out of your house. better way will be if you will do the operation in a field.

[nelson]

TR locator

Ok KT315 and one more time, many thanks for your support.
Tomorrow i´ll get CD4069 and place it on the board.
Also, i´ll look for TIP32A. Now for testing purposes i´ll put TIP34 that have a bigger case, but i´ll run it away from the pcb board.
On my next message i´ll send a picture of my work.
Regards
Nelson

hi Nelson and all. you must not be embarrassed. this mistake, I mean anyone can expects that K561LN2=4049, are repeated in all reference books in russian. but really K561LN2=4069. if you do not want to correct PCB then you can order 4069. I wrote about the mistake in forum of Ivan, but you may be know that when people married they disappear from WWW on very time I hope Ivan will be back...
... I must also note for all that main difficulties will be for you the tuning of contours in resonanse (then you can get maximum possible reply reaction on metall). you must do prelimenary tuning in your room (I hope your working place is not kitchen) but final tuning out of your house. better way will be if you will do the operation in a field.