PROFESSIONAL PRE-BUILT (DOUG) COIL MACHINES

THESE MACHINES ARE AVAILABLE FOR EXPERIMENTAL USE ONLY

Please, read the additional Safety Notices at the bottom of this page.

Coil machines are electromagnetic field generators. They can be used for the study of the effect of alternating magnetic fields on different systems.

We offer the only professionally built turn-key coil machines.

The "Standard" model is the traditional Doug coil machine design.

The "3D" 2-coil model is an improved version of the traditional Doug coil machine. It produces a magnetic field that is more uniform over a larger volume.

Swith Configuration Calculator

MANUFACTURING/WARRANTY INFORMATION

The components of the coil machine are:

  1. control unit (manufactured by our company)
  2. coil (manufactured by our company)
  3. professional amplifier (we recommend the QSC RMX 2450a)
  4. frequency generator (we recommend the Instek SFG-1003)

We build professionally engineered turn-key coil machines that are ready for use: every component is included in the quoted price for your convenience. We provide a 3-year parts and labor warranty for the control unit and the coil. The amplifier and frequency generator carry their original manufacturers' warranties.

If you wish to use your own amplifier or frequency generator (or customize the machine in any other way), we will be happy to accommodate your requests. Please call us with your needs and we will quote you a purchase price for the specific equipment you want.

Every coil machine comes with a detailed step-by step instruction manual, illustrated with color photographs, that makes setup and operation simple.

DELIVERY INFORMATION

Occasionally, we get a larger than usual number of orders at once, which may result in a short waiting period before a machine can be shipped.

IMPORTANT NOTE: We currently have an unusually long backorder time. The expected delivery date of a machine ordered now is mid-to-late August. We apologize for the delay. Our typical 2-4 week waiting time should resume in a few months.

Whenever the waiting time for a machine is more than 2 weeks, we accept a 50% deposit to reserve the customer's place in the manufacturing queue. This allows us to purchase the parts for the machine and start the manufacturing process ASAP. The second half of the purchase price is due when the machine is actually built - approximately 1 week before it is shipped. NEW feature: you can now use PayPal's "No Payments + No interest for 6 months" financing option if you choose the "Bill Me Later" feature upon checkout.

Please, call (520.822.4416) or email us at for a delivery date.

Standard Doug Coil Machine



 


(This option is only available when there is a waiting time, please call before choosing this option.)

The white cabinet shown in the bottom includes the control unit of the coil machine: the capacitor bank, the control switches, the current meter, and the connection terminals for the function generator (shown on top), power amplifier (middle) and the coil. The power amplifier and the function generator are included in the price of the machine. They are shipped separately and the user can connect them to the control unit with a couple of cables: like connecting a VCR and  a DVD player to a TV. All cables, plugs, and instructions to connect are included with the desktop. No tools and technical skills are needed.

This machine requires ONE coil for operation. The machine can work with our special air-cooled coil, or a traditional "basic" coil. Coils are sold separately below.

Click here for a diagram of the control knobs

$2,700
with local pickup in Tucson, AZ
   
   
$2,850
with packaging and UPS ground shipping

3D Coil Machine

This machine is a new, improved version of the traditional Doug coil machine, developed by our company.


 

NOTE:

You can build a 3D Coil Machine in two stages. First, you can purchase a Modular 3D Coil Machine Control Unit (see below) and one coil. In this configuration the machine functions exactly like the Desktop Standard Coil Machine. You can purchase a Modular 3D Coil Machine Extension Unit (see below) and a second coil at a later time.

Coil configuration of 3D machine:

 

Experimental setup with microscope in Mode 2

 

This machine was developed to overcome the fact that the magnetic field generated by a single coil decays quite rapidly with the distance from the surface of the coil.

There are two advantages in using two coils:

1. The volume in which the magnetic field strength is above 100 gauss is doubled.

2. The experimental time is cut in half.

The 3D coil machine includes a control unit (bottom white box), and an extension unit (upper white box) that allows the machine to be used with two coils. The units can also be purchased separately below.

The 3D machine can work with one or two coils. It has two sets of capacitors (one for each coil) and a special electronic circuit that controls the phase of the magnetic fields generated by the two coils.

The 3D machine can be used in 3 different modes.

In Mode 1, the machine operates with one coil, and it generates the same magnetic field as the traditional "Standard" coil machine. The coil works at 15A. Click here for a diagram of the magnetic field generated by a single coil.
 
In Mode 2, the two coils are electronically coupled, and should be positioned facing each other (with their acrylic sides) 6-20 inches apart. The experimental area is between the two coils. This configuration is somewhat analogous to a Helmholtz coil. This configuration produces a more uniform (homogeneous) magnetic field than Mode 1. (The volume in which the magnetic field strength is above 100 gauss is doubled.) ( Click here for a diagram of the magnetic field generated by two coils in this configuration when the coils are 6 inches apart. Click here for a diagram of the magnetic field generated by two coils in this configuration when the coils are 16 inches apart. The coils should be placed as close together as the size of the experimental area permits.)
 
In Mode 3, the two coils are placed next to each other 0-8 inches apart, facing in the same direction. This configuration produces a greater volume and strength of magnetic field than Mode 1. (The two coils can be placed even further apart, but in such a case, they will operate as two single coils with independent magnetic fields.)

This machine requires TWO identical coils for operation. The machine can work with our special air-cooled coils, or traditional "basic" coils. Coils are sold separately below.

$4,750
with local pickup in Tucson, AZ
Temporarily unavailable
   
   
$4,925
with packaging and
UPS ground shipping
Temporarily unavailable

Modular 3D Coil Machine Control Unit


 


(This option is only available when there is a waiting time, please call before choosing this option.)

The power amplifier and the function generator are included in the price of this machine.

The extension unit can be purchased below.

This machine requires ONE coil for operation. The machine can work with our special air-cooled coil, or a traditional "basic" coil. Coils are sold separately below.

$2,800
with local pickup in Tucson, AZ
   
   
$2,950
with packaging and
UPS ground shipping

NOTE:

You can build a 3D Coil Machine in two stages.
First, you can purchase this control unit and one coil. In this configuration the machine functions exactly like the Desktop Standard Coil Machine.
You can purchase the extension unit and a second coil at a later time.

Modular 3D Coil Machine Extension Unit


 


(This option is only available when there is a waiting time, please call before choosing this option.)

The extension unit can be connected to a Modular 3D Coil Machine Control Unit to make a 3D Coil Machine (see above).

This unit requires ONE coil for operation. Please, select the same type of coil as for the original coil machine. Coils are sold separately below.

$2,000
with local pickup in Tucson, AZ
   
   
$2,070
with packaging and UPS ground shipping
 

Air-Cooled Coil

New Design, invented by our company

 

 

The wire in these coils is very tightly wound, so it produces a high-quality strong magnetic field the same way a "standard" coil would. However, it is interlaced with cooling tubes and supplied with a fan that keeps it at a significantly lower temperature than a "standard" coil, so it can be used for much longer duration. For details, see below.

The coils have a clear acrylic sheet cover, that does not interfere with the generated magnetic field, but provides extra protection for the user. The coil can be placed on any flat surface for easy use. The coils come complete with a 15 foot connecting cable and all the plugs.

Because of the cool-coil design, the machine can be run continuously at 15 A without overheating the coil (below 190 degrees) for the following time durations:

  • Below 600 Hz - unlimited
  • 1010 Hz - 15 min.
  • 1540 Hz - 8 min.

Since the coil has a fan, it is enough to cool it for about 15 minutes before it can be safely used again.

These coils have a 7-8 mH inductance. Other values are also available upon request. One coil is needed for the operation of the Desktop machine. Two coils are needed for the 3D machine. If you wish to purchase two coils, click the "ADD to Cart" button once, and change the quantity to 2 on the shopping cart page.
$380
with local pickup in Tucson, AZ
   
   
$420
with packaging and UPS ground shipping

Standard Coil

"Standard" Coils without air-cooling are also available. However, we do NOT recommend the Standard Coil, because it heats up too quickly during operation.

The coils have a clear acrylic sheet cover, that does not interfere with the generated magnetic field, but provides extra protection for the user. The coil can be placed on any flat surface for easy use. The coils come complete with a 15 foot connecting cable and all the plugs.

The coils have a 7 - 8 mH inductance, but other coils are also available upon request.

One coil is needed for the operation of the Standard and the Desktop machines. Two coils are needed for the 3D machine. If you wish to purchase two coils, click the "ADD to Cart" button once, and change the quantity to 2 on the shopping cart page.

$280
with local pickup in Tucson, AZ
   
   
$320
with packaging and UPS ground shipping
The coil cables, as well as the cooling fan cable, terminate in plugs that simply plug into receptacles on the front of the machine.

The setup and operation of the machine is very straightforward. We have never had a customer who found it difficult to use a machine.

Please, call or e-mail us for further technical information. We are happy to answer any questions you may have.

Phone: 520.822.4416 or 520.837.1260

E-mail: info@coilmachines.com or alevy58@yahoo.com

If you wish to purchase a machine, you can do so on this website by using your credit card. Secure payment processing is handled by PayPal. The payment will appear on your credit card statement as PayPal/EDUFLIGHT LABORATORIES.

We accept personal checks or money orders, as well. If you wish to pay by a check, please call us for instructions.

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Safety Notices and Disclaimers

Coil machines are not FDA approved or recommended for use on humans.

Persons who are pregnant or have a pacemaker should NOT use or operate these machines.

Safety precautions regarding electric instruments and magnetic fields should be taken as posted on the machine.

These machines are for the purpose of personal investigation into the effects of electromagnetic frequencies. If the user has a serious medical condition, the use of this technology should not replace any competent medical advice the user is currently receiving.

The user should understand that the biological mechanisms of response from this instrument are not known, and should employ this device for experimental use only.

The user must undertake responsible experimentation and voluntarily accept all responsibility for the application of this device.

The user cannot hold the builder of this instrument responsible for any consequences, harmful or otherwise, that may occur as a result of the use of this instrument. The builder cannot take any responsibility for those who treat themselves.