King Cobra PCB

[Patrick]

nice job, Patrick! thanks. is this meaning we move one way parallel course? have you ordered the PCB made anywhere?

Thanks,
I have checked the PCB only once.
I redraw a single sided PCB.

[kt315]

fixed

[kt315]

nice job, Patrick! thanks. is this meaning we move one way parallel course? have you ordered the PCB made anywhere?

[Patrick]

have anybody right numbering of the schematic? or may be a fabric made schematic? if not, I will do in random form.

This is consistent with the schematic.

[kt315]

have anybody right numbering of the schematic? or may be a fabric made schematic? if not, I will do in random form.

[kt315]

hi Merc and folks.

can anybody there give me a positional digital componets' designation on the schematic? my pcb is in r-e state now... thinking if I will not get the info then I will be enforced to mark the positions in random form... but the due copy is considering the original in all due smallest details...
you have to agree to me...

tia
regards

[ivconic]

Agree, most probably is the same coil as for Golden Sabre etc...
I didn't draw pcb for it yet. Not sure if i will ever. Because; basically it is the very same "platform" as Golden Sabre. Except use of 7660 instead 4024 and those 2 transistors in negative supply. Is it better? Maybe it has better features with 7660? Maybe not. I am not sure.
And of course; unlike Golden Sabre, Cobra has ppoint mode (static, nonmotion). Nice. If i ever decide to draw pcb for it i would probably exclude Notch part again...

[Merc]

Mindfree,
As far as I know, no one has made a clone of the King Cobra. You would have to layout your own printed circuit board. I have not seen the coil data either. Since it is a Tesoro clone, it probably is the same as Tesoros of the late 80's early 90's. I have a King Cobra but I have not checked the inductance of the coils yet. I have done a quick calculation given the alleged operating frequency and the caps listed on the schematic and it (coil) does appear to be the same as Tesoro. It is basically a Golden Sabre with a non-motion pinpoint or a Royal Sabre minus the surface blanking circuit.

Merc

[mindfree]

Most probably it is 100% accurate. Everything so far, that came from W.Lahr turned to be 100% accurate.
I made 3-4 different models according to his schematics and had no problems at all.
Salute to Him!

Great! Where can i find the PCB layout files? Also coil info etc.
I want to give it a try.
Thanks!

[ivconic]

Most probably it is 100% accurate. Everything so far, that came from W.Lahr turned to be 100% accurate.
I made 3-4 different models according to his schematics and had no problems at all.
Salute to Him!

[mindfree]

Thank you!
Has anyone successfully built it?

[Merc]

Here is the posted schematic. I do not know if it is accurate or complete but it looks like it should be pretty close.

Merc

[mindfree]

you see a line above here on page... up your eye... find word SEARCH... click on it...

good luck

Hi kt315,
Thanks for the tip! I had already searched for it but all I found were schematics for Cobra II.

[kt315]

you see a line above here on page... up your eye... find word SEARCH... click on it...

good luck

[mindfree]

Here are some pics of the PCB my King Cobra. They may be useful to someone. The schematic has already been posted.
Merc

Hi Merc,
Sorry for going slightly off-topic - Has anyone built this detector? I can't seem to find the schematics for King Cobra.
Please help!