King Cobra PCB

[kt315]

all files have been reuploaded, there are new one bought the PCB's, mainly for them. 100mb. regards.

http://www.avral.ru/689640c2f0d5d285c7ee1237c630be0d

[ivconic]

I downloaded those files and among them i saw Eduardo's video.
Wow, splendid work Eduardo!
Nice, neat and clean!
Now i would like to ask you something to do;
can you take mineral, stone from your video and put coin or ring on the top of it and than show detection and Cobra's behavior?
Can you?
I asked this before somewhere on this thread but i got no answer nor response.
Hopefully i am not asking too much!?
Thanks in advance!
Cheers!

[eduardo1979]

I downloaded those files and among them i saw Eduardo's video.
Wow, splendid work Eduardo!
Nice, neat and clean!
Now i would like to ask you something to do;
can you take mineral, stone from your video and put coin or ring on the top of it and than show detection and Cobra's behavior?
Can you?
I asked this before somewhere on this thread but i got no answer nor response.
Hopefully i am not asking too much!?
Thanks in advance!
Cheers!

I understand what you mean. I have watched your video carefully and my answer was obtained in a previous post. The XP GMPower has 3 shades, iron first tone, second tone for foil and third tone for coins. Unlike GMP, the KING COBRA has 2 tones. With the potentiometer placed at least discrimination, the iron is not detected at all. The foil is detected in the first ring and the coins are detected by the second ring. If we put a coin under a hot rock, the coin is detected in the first tone, like a foil. If we place a foil under the hot rock, the metal detector does not emit any sound. So there is no miracle. This is happening with all VLF detectors. Now I have no coil available to make another video. The coil with which I made the video, was a TGSL and not available. In the future I'll build one for the King Kobra. Greetings.

[ivconic]

I understand what you mean. I have watched your video carefully and my answer was obtained in a previous post. The XP GMPower has 3 shades, iron first tone, second tone for foil and third tone for coins. Unlike GMP, the KING COBRA has 2 tones. With the potentiometer placed at least discrimination, the iron is not detected at all. The foil is detected in the first ring and the coins are detected by the second ring. If we put a coin under a hot rock, the coin is detected in the first tone, like a foil. If we place a foil under the hot rock, the metal detector does not emit any sound. So there is no miracle. This is happening with all VLF detectors. Now I have no coil available to make another video. The coil with which I made the video, was a TGSL and not available. In the future I'll build one for the King Kobra. Greetings.

I see.
That's not bad at all.
Better to produce lower audio than not to produce it at all... like some other detectors that i know.
Instead GMKC i made Panthera which behavior is similar to what i see on your video.
But i will make GMKC too soon, i like it.
Cheers!

[kt315]

original Cobra coil connector wires in photos.

[kt315]

all files have been reuploaded. there are new users mainly for them.

http://webfile.ru/6357184

http://www.sendspace.com/file/mnnp71

[selim]

my pcb

[Prospector_Al]

Hi Mrand,

Nice logo! I have the detector to go with it...

http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2 FPTO%2Fsearch-

adv.html&r=10&f=G&l=50&d=PG01&S1=Westersten.IN.&OS =IN/Westersten&RS=IN/Westersten


Prospector_Al

[lari]

hello I made a king cobra but is not it working after the virtual is not good I have only 3v. All parts are checked out okay but I think the scheme is not a good combination.

[kt315]

selim, too nice work. do not remember to solder all pads and pins on both sides anotherway you will get a trouble with it.

[skool]

what size of the wire is suitable for king cobra coil ?

[tuxnor]

Tesoro coil will fit..but wich one ? i see sabre will fit ?

[kt315]

Tesoro coil will fit..but wich one ? i see sabre will fit ?

do you need PDFs files on TGSL coil making? I can repeat them here, in this thread. it is not a problem for me...

[kt315]

====
Tesoro concentric
Tx 1,5 5.7mH 22 ohms
Rx 3,4 6.2mH 22 ohms
====
Tesoro early Lobo DD
Tx 2,4 10mH 55 ohms
Rx 1,3 1.35mH 12 ohms
====
Tesoro
Name TX-L TX-R (ohms) TX-fo TX wire RX-L RX-R (ohms) RX-fo RX wire
________________________________________
Brown 8" 5.59mH 21.2 --- --- 6.23mH 22.1 ---
---
Lobo 5x10 9.93mH 50.5 --- --- 1.33mH 10.97 --- ---
Lobo 8x15 10.52mH 62.8 --- --- 1.37mH 13.13 ---
========
Troy Shadow
Name TX-L TX-R (ohms) TX-fo TX wire RX-L RX-R (ohms) RX-fo RX wire
________________________________________
X2 S-9 9" 5.72mH 23.6 --- --- 6.25mH 25.2 --- ---
X5 7" 1.067mH 4.33 --- --- 6.53mH 32.2 --- ---
X5 9" 1.044mH 4.45 --- --- 6.50mH 32.7 ---
---
X5 1.1mH / selfrez = 255kHz 6.5mH / selfrez = 87kHz
====

[porkluvr]

Coil Parameters

KT315, I believe that your Lobo coil information is backwards. What you wrote does agree with the original data that was posted (link below), but that data has since been revised.

Coil Parameters

There has been a good bit of controversy concerning the Lobo, so if I'm wrong, please somebody come across with some first hand information. Lots of people seem to have a clone, but nobody has the real thing (or else they're not speaking up).