Magnum on steroids!

[SVEN1]

If your lucky enough to have a 3-D printer you could make one.
I will probably end up up making one using epoxy and fiberglass cloth. Like I did once before.
Think I have something around here I can use as a mold.

[CDI]

Where to buy?

I don't know, never used enclosure like that.
Check ebay...

[Altair]

Cause fit into Bulgarian case for Terminator, Golden Mask...etc.

http://www.emporion359.com/userfiles/productlargeimages/product_927.jpg

http://s2.dmcdn.net/OMWoi/1280x720-OzI.jpg

Where to buy?

[ivconic]

[CDI]

Why the shape? What case is it going in please?

Cause fit into Bulgarian case for Terminator, Golden Mask...etc.

http://www.emporion359.com/userfiles/productlargeimages/product_927.jpg

http://s2.dmcdn.net/OMWoi/1280x720-OzI.jpg

[Sean_Goddard]

Had some PCB's made up of "mag_redu_pcb" version:using 1206 sized SMD components.
Should arrive this week Tuesday.
I have been studying the schematics and PCB layout this morning.

Why the shape? What case is it going in please?

[ivconic]

When operating the ground balance with this type of filter to a lot of signals from earth salts. Another reject ground channel similar in Tesoro Golden Sabre must. Many details of the change in tone .Faults in filters?[ATTACH]37751[/ATTACH]

Actually GEB is working very fine and accurate at this detector.
It is the DISC which need improvements, it is not quite accurate at higher depths than 10-15cm in a soil.
Medium sized rusty iron pieces are easy fooling it.
That's the only drawback at this detector (also explanation why it is so successful "collector").
Thanks for the suggestion! I will try that way.
What a coincidence; i am just making another TH unit!
In a few days i will report here the news.

[scs]

When operating the ground balance with this type of filter to a lot of signals from earth salts. Another reject ground channel similar in Tesoro Golden Sabre must. Many details of the change in tone .Faults in filters?

[ivconic]

You have to put it into ZIP or RAR archive.

[Artyom]

true I made changes to P 35, 42 on the board? I can not attach an image ...

[ivconic]

What distance you get to the coin in the air and a size of the coil? The receiving coil is non-resonant? If you make a dual-frequency device to switch the frequency of the generator only, no longer need to configure anything?

Size of coil is 30x28cm, distance in air for 1 euro coin is 35cm.
No, receiving stage is wideband. Nothing special with RX coil.
Frequency is switched simple with changing caps in LC tank.
Nothing else needs to be done.

[Artyom]

What distance you get to the coin in the air and a size of the coil? The receiving coil is non-resonant? If you make a dual-frequency device to switch the frequency of the generator only, no longer need to configure anything?

[ivconic]

Thanks for the reply. Not seen on the ground balance control scheme. The adjustment is carried out?

"...R90= Audio pitch, audio frequency, also can be fixed value, according to your own preference..."

This is typo! It should be "R60= Audio pitch, audio frequency, also can be fixed value, according to your own preference..."

[Artyom]

Thanks for the reply. Not seen on the ground balance control scheme. The adjustment is carried out?

[ivconic]

Now... this is interesting!
Next logical question would be; "what if i can't obtain "1522" otpocoupler nor i can't find the next best match?"
I struggled to decipher the "1522" label on original otpocoupler in Golden Mask detectors.
Most probably it is "Made in China" product with not-possible-to-decipher label!
"Shoo Mang Fu Tao" kinda labels, but this time with cyphers.
Well... in that case we are in troubles, because most interesting feature; the 2-tone, will not work properly.
But with a bit of "trimming" here and there; one can come to decent solution even with another kind of otpocoupler here.
One of the ideas how to trimm it with different optocoupler:

Main point here is to make the led diode and transistor inside the optocoupler to be "sensitive" in a range.
Personally i am more impressed with results achieved with diy vactrol as at Dooley's project.
This thing can be modified with use of diy vactrol, interesting to think about!