Bounty Hunter 10" Magnum Search Coil

[lucifer]

Can anyone provide some info on this coil? I'm interested mainly in the Tx coil inductance and resistance. What is the overall performance of the coil?

[lucifer]

I ordered this coil and measured its resistance and inductance. Here they are in case anyone else need this info:

TX: ~2.96mH, ~9.6 Ohm
RX: ~2.55mH, ~16 Ohm

[Melbeta]

What pins did you measure for your readings?

Can anyone provide some info on this coil? I'm interested mainly in the Tx coil inductance and resistance. What is the overall performance of the coil?

I believe that is the same 10" coil I received with my BH, it has a red case on the detector, and the coil will work on the Teknetics Mark 1 too. The coils are interchangable.

At the time, PNI manufactured the coils. I like the regular 8" coil best, as it gets more things.

[lucifer]

You are probably right. I'm planning to use this coil on a VLF I am currently designing myself. I was expecting lower Tx coil resistance for greater Tx power but that will do too.

[Melbeta]

How did you measure the coil?

I ordered this coil and measured its resistance and inductance. Here they are in case anyone else need this info:

TX: ~2.96mH, ~9.6 Ohm
RX: ~2.55mH, ~16 Ohm

Okay, I know you used an inductance meter, and a resistance meter, but how did you come up with those measurements above?

Which pin to pin? In other words, the details if you can reveal them. I would really appreciate them.

The coil was not a regular item, it first came out just before Christmas, as a Christmas special, along with the Bounty Hunter red machine.

I was a dealer for Bounty Hunter and a dealer with Teknetics. I also knew the guys at PNI. This was just before PNI went out of business. I had phoned George Payne, to ask him how to soup up the Teknetics Mark 1, and he told me to grab some of the Bounty Hunter red machines, as the supply was going quickly. He did not mention they were about to go under. But I found that out later, when they did.

Then Internal Revenue Service contacted me, as one of the many dealers, and said they were going to auction off the patents. I was not interested in the patents, but First Detector of Texas was the high bidder and got George Payne's patents.

I tell you this, so that you know, that coil was not out there very long. It was George Payne who told me that the magnum coil, would work on all of the Teknetic detectors. So that tells me that the coils in the Teknetics have to have a great deal of similiarity among the various models.

Also, I will tell you that the Bounty Hunter red machine, and the Teknetics machines, and the later machines at Compass that George Payne was involved with, according to my testing them, I believe they are superior to any other machines out there at that time. One of the things that I liked about them is that they permit the user great latitude in adjusting and using the circuits, relative to the conditions being experienced at the time. Not only that, they had features that you do not find on today's machines, such as the ability to igor the top 1", top 2", top 3", and top 4" of the soil, and look below that area. They also had fast and slow scan, and 2 filter selection and 4 filter selection, and better target identification and target selection. I know this as I had tested new machines before I began to sell them. I was a dealer for Bounty Hunter, Teknetics, Compass, Garrett, Whites, Fisher, Gold Mountain, A.H. Pro, and many others. If I was building a machine today, like you are going to, I would concentrate on the power going into and through and returning from the coils. That is something that modern manufactures cannot do, they are limited on power useage..

I am not a fan of computer controlled detectors, it is that old adage of Hillary Clinton's, "we know what is best for you", and "know how to raise your children better then you can raise them" mentality....

[Qiaozhi]

If I was building a machine today, like you are going to, I would concentrate on the power going into and through and returning from the coils. That is something that modern manufactures cannot do, they are limited on power useage.

Now that raises an interesting question ... what exactly are the power output restrictions for metal detectors?

The restrictions for the UK can be found here -> http://www.ofcom.org.uk/radiocomms/i...s/rlans/short/

In particular, read the part in paragraph 7M ->
Metal Detectors
This apparatus, operating in the 9 to 148.5 kHz band, may only be used for the purpose of detecting metal and are limited to operating in the magnetic field. Please see IR2030 Table 3.13 for further details of channels available, permitted maximum power and channel restrictions applicable.

There is actually a mistake in that paragraph. The relevant table should be 2.13 (not 3.13). The IR2030 document is attached.

[lucifer]

I measured values again today and got slightly different result for Tx inductance. I attach an image with the pinout. I'm not sure for the last pin if it is free or shield (if coil has shield).
Regarding Tx power standards, I am not going to comply with them as I'm not going to build a commercial detector. Also my frequency will be below 9 Khz.

[Melbeta]

Thanks for the information.....

I measured values again today and got slightly different result for Tx inductance. I attach an image with the pinout. I'm not sure for the last pin if it is free or shield (if coil has shield).
Regarding Tx power standards, I am not going to comply with them as I'm not going to build a commercial detector. Also my frequency will be below 9 Khz.

Thanks for the clarification, right now, my larger coil is stored away, as I was not that thrilled with it. My finds dropped off when I used it over the regular 8" coil.

Also, your image coil, is black plastic, and mine is white plastic. So I was curious whether or not, yours is the exact same coil as mine. It could be, as mine was a Christmas bonus, coming along free with the normal detector package. Perhaps that is why mine is white color...

I did try it with the Teknetics Mark 1 detector, and it did perform better with it, as the Teknetics Mark 1 has greater power than the Bounty Hunter Pro red machine.

When I get a chance, I will dig it out, and check the resistance, inductance, and ohms of those pins you designated.

On the power suggestion, it came from a conversation I had with Charles Garrett once, when I asked him about enhancing a metal detector. He said that USA manufacturers, the metal detectors are regulated by the FCC as radio emitting devices, and there can be no radio signal leakage beyond a certain distance from the coils. I forget right now, how much, but I think it was 100'. Thus they have to control the amont of voltage power, going into the transmit coil, and the same power coming out of the receive coil.

A friend of mine with Tranex, who was their chief engineer, and Tranex was involved with making coils and inductors, told me to change the bias resistor of the amplifying transistor, both on the Tx and the Rx sides, and it will put more voltage into the coil, and make the detection depth deeper. He did it on his Garrett detector, and his definitely out performed my Garrett detector. I never got around to doing it, as I was busy then. But that is what I was speaking about when I mentioned power enhancement.

[Joe(TX)]

.........Melbetta......you keep mentioning the Bounty Hunter red machine........I guess that you forgot the actual name........brainstorming I could only come up with the Bounty Hunter Red Baron and the Teknetics Special Edition Mark I which was in a red case!!........So which one are you referring to ??.....Also their was a Bounty Hunter Big Bud Pro which was also housed in a red case!!................Thanks Joe

[Melbeta]

My memory is jogged and engaged now....

.........Melbetta......you keep mentioning the Bounty Hunter red machine........I guess that you forgot the actual name........brainstorming I could only come up with the Bounty Hunter Red Baron and the Teknetics Special Edition Mark I which was in a red case!!........So which one are you referring to ??.....Also their was a Bounty Hunter Big Bud Pro which was also housed in a red case!!................Thanks Joe

It was the Bounty Hunter Big Bud Pro SE unit, what I call the red machine. There were other color Big Bud units. I think some of them were dark blue or black, that was a long time ago for a 75 year old guy to remember.

This is what George Payne said about the Bounty Hunter coils:
Quote:
The BH coils that were build by Teknetics in the 1980's will work fine on the Mark I. However, the newer BH coils may not work as well or not at all. One of the best coils ever made by Teknetics was the thin 10 inch coil. It's only about 3/8 inch thick and is white in color.
Unquote:

He was speaking about the thin white 10" coil, that came out for the Christmas special, with the Bounty Hunter Big Bud Pro SE unit. I spoke to George Payne just before they shut down, and he mentioned that I should get some extra SE units, as the supply was getting pretty low, and I would probably not be able to get any more. He neglected to mention to me, that they were just about to go out of business. So I did what he said, and ordered two extra units, and when they went out of business, I kept them for personal use. One has recently began acting up, just on discriminate mode, runs okay on all metal. So I guess I will have to send it in, unless I can find some schematics for it. The other one is brand new, and I started to use it this fall. And yes, I have tried that 10" coil on the Mark I, and it does work good on it!

And I had a Teknetic Mark 1 special edition red one too, and for some reason, it seemed to run better than the gray Mark 1, although I think it was special edition for a Christmas special. But again, it was a long time ago. I also sold the Bounty Hunter Red Barons.

And again, George Payne, in his words, on the Mark I:
Quote:
The 9000 and 8500 series were also fine detectors. But they have limit depth. Here in Oregon the mineralized ground will limit the detection depth for a 9000/8500 to about 4 or 5 inches. The Mark will do better than that. In low mineralized ground the difference is even more. I used to take a (modified) Mark I with me when I went on trips. In Mississippi, where I grew up, I was amazed at how well the Mark performed. I also perferred the Mark's Target ID over the 9000/8500. The Mark's single sweep ID accuracy reading is far superior to the 9000/8500.

The Mark I is really a 1 and 2 filter detector. The circuit automatically measures the ground mineral magnitude and decides which filter to use. If for example you make an "air test" on a target it will always use the 1 filter mode. However, as soon lower the loop to the ground it switches to 2 filters automatically. It will continually switch between the two based upon the ground mineral strength.

A analog signal can be converted into digital form for processing using "digital signal processing" or DSP for short. The DSP term is a very general and broad discription for manipulating analog signals digitally. In many cases using a DSP approach will cut parts count and cost but add little to actual performance.
Unquote:

And there is that computer crap again, the DSP, which is digital, and when they moved from analog controls, to digital controls, then the computer takes control of the detector away from us...And you can tell above, it was to "save costs". And pay attention, it does NOT add to the actual performance! George Payne's own words.....

Those were good days, back when I believe they made better detectors.
In my opinion, computer run equipment, is not necessarily better. It is just that mentality of Hillary Clinton, "we know what is best for you". I prefer to set my own detector and run it the way I want to run it, rather than select computer mode options. But people who have never done it for themselves, do not know any better. If we complained enough, then they would set the computer units, so that we could change them as we wanted to. It just would take a larger core for the microprocessor unit, so they could include more varied instructions... How can a person, compare an detector, that is run by digitally by a computer, against the exact same detector, still in analog mode? They cannot, as it does not exist.

Now I will go to my second pet peeve. Cars with computers!

It is like the cars of today, today the government deceives us into believing that the emissions give us cleaner air. As a former race car engine builder, from the 1950's and 1960,s, I know it is because they have retarded the entire valve train timing assembly. We used to over-ride it, by replacing the timing gear, with a police interceptor timing gear, then re-setting the timing to 12 degrees BTDC. During those times, it was retard an entire 4 degrees.

They they really stuck it to us, and put the computers in, and let the computers sense (smell) the exhaust fumes, then report back to the computer chip, by high or low volts, and the computer chip then advances or retards timing, increases or decreases air intake, increases or decreases fuel intake. So all you can do today, is read the computer chip Eprom contents, figure out what the bytes are, but it will all be incremental changes. Or you can intercept that voltage line from the oxygen sensor, and play with increasing the volts or decrease the volts, that report to the computer, and deceive it, so that it will respond as you want it to respond.

So what have they done? Well, they will not tell us, but they have artifically retarded and artifically advanced the timing train. It is still set on an retarded valve train assembly, as far as mechanical means. You cannot change it, as there are no parts available today. Even the police run retarded, unless they order interceptor cars.

It all came from a little put-put racer guy, in Arizona, who asked Intel engineers, to help him enhance his small racer unit somewhat, to give him an advantage over his competitors. Up to then, they had a control, that they could dial and move the distributor, for advance or retard. He wanted a chip to do it for him, so he could concentrate on racing. From those studies, they took it to Detroit, and stuck it to us. I have a lot of that material from Intel. And if you can tell, yes it ticks me off. They are punishing us today, for what that put-put racer guy wanted...