$2,619  SALE $2,450	2018 GB-4000, SR-4, and our Exclusive Dual-Ray LED Photon Wand and Aluminum Travel Case PREMIER PACKAGE . . . EVERYONE'S NEW FAVORITE!   The GB-4000 and SR-4 Amplifier runs all of the original Rife Machine frequencies developed by Dr. Royal Rife. This is the function generator and amplifier for those wanting additional RF power capability, and a compact travel case that is lightweight, yet provides superb strength and protection to both instruments. This Premier Package is the most lightweight, yet substantially protective combination to transport or travel with the GB-4000 and SR-4. Our Premier Package also includes our exclusive, newly developed 2018 Dual-Ray LED Photon Wand which adds visible red and infrared LED therapy capability to the GB-4000. The GB-4000 and SR-4 incorporates all of the engineer-designed and feature-rich functions built into this exceptional duo. The Aluminum Travel Case is generously sized and its interior capacity leaves plenty of room for power supplies, cords, and accessories. We include the latest 2018 Rev. D8 software and hardware updates, both 120 volt and 240 volt power supplies, and all accessories shown HERE. 2-year manufacturer's warranty, FREE Technical Support. 6" H x 18" L x 14" W (12 lbs.) Made in USA. In Stock - Available for Immediate Shipment FREE shipping in the contiguous USA!
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$4,445  SALE $4,220	2018 GB-4000 & M.O.P.A. 1930's/1950's Master Oscillator Power Amplifier Replica   New 2018 M.O.P.A. Model Update: The new 2018 M.O.P.A. Amplifier has just been updated to work with the GB-4000 in both "Audio" and "RF" modes. This revolutionary upgrade now allows users to run all "Auto Channel" frequency programs up to 20 Million Hertz (MHz). This is a true breakthrough, as there is not another plasma tube instrument on the market that has this capability! The GB-4000 and M.O.P.A. runs all of the original Rife Machine frequencies developed by Dr. Royal Rife. This is the function generator and M.O.P.A. amplifier for those wanting maximum RF power capability using the plasma tube radiant method of outputting frequencies. The GB-4000 and M.O.P.A. combination is the top-of-the-line package capable of 207 watt peak RF power output compared to the SR-4's 30 watts. Each M.O.P.A. is custom-built and thoroughly tested for quality assurance. Unique features of the M.O.P.A. include proven solid-state and vacuum tube technology, built-in frequency counter, and variable RF carrier frequency range of 2.1 MHz to about 3.6 MHz. We include the latest 2018 software and hardware updates, either a 120 volt or 240 volt internal power supply (please specify voltage for your country), and all of the accessories shown HERE. 2-year manufacturer's warranty, FREE Technical Support. 10" H x 17" L x 10.5" W. (21 lbs.) Note: Plasma Tube Assembly not included but available from another company for $370 including shipping. (We'll give you the details about how to purchase the Plasma Tube Assembly at the time you place your M.O.P.A. order.) Made in USA. In Stock - Available for Immediate Shipment FREE shipping in the contiguous USA!
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3.7 Watts Digital/Analog Sweep Function Generator with 1/100th Hertz Resolution $1,725	2018 GB-4000 3.7 Watts Sweep Function Generator   The GB-4000 runs all of the original Rife Machine frequencies developed by Dr. Royal Rife. This is the function generator that is simple to use, yet incorporates the latest advanced technology. Plug it in, turn it on, select a program, and press the run button - and you're immediately running frequencies! Unlike lesser instruments, the GB-4000 produces frequencies from 0.1 Hertz to 20 million Hertz at an astounding resolution of 1/100th of a Hertz (such as 528.72). The GB-4000 can operate in both audio and RF (Radio Frequency) modes and is the only function generator that features the highly desirable 3.1 MHz Carrier Frequency. It features 2000 programmable channels, advanced "gating" and "sweep" capability and can run up to 8 frequencies simultaneously. Other unique features include square and sine waveforms, 10% to 90% square wave duty cycle, and variable power output up to 5.4 watts. These distinctive features make the GB-4000 one of the most popular function generators in the world. We include the latest 2018 Rev. D8 software and hardware updates, both 120 volt and 240 volt power supplies, and all of the accessories shown HERE. 2-year manufacturer's warranty, FREE Technical Support. 4.25" H x 10" L x 8" W. (2 lbs. 4 oz.) Made in USA. In Stock - Available for Immediate Shipment FREE shipping in the contiguous USA!
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$2,420  SALE $2,320	2018 GB-4000 & SR-4 Set   The GB-4000 and SR-4 Amplifier runs all of the original Rife Machine frequencies developed by Dr. Royal Rife. This is the function generator and amplifier for those wanting additional RF power capability. The GB-4000 features all of the functions as described above. The SR-4 Amplifier connects easily to the GB-4000 using the included BNC cable and boosts the RF output of the GB-4000 from 2 watts up to 30 watts peak power depending on the frequency selected. The SR-4 Amplifier also features 4 sets of output connectors for added functionality. We include the latest 2018 Rev. D8 software and hardware updates, both 120 volt and 240 volt power supplies, and all of the accessories shown HERE. 2-year manufacturer's warranty, FREE Technical Support. 4.25" H x 20" L x 8" W. (4 lbs. 1 oz.) Made in USA. In Stock - Available for Immediate Shipment FREE shipping in the contiguous USA!
$2,720  SALE $2,495 Click HERE for more M.O.P.A. Information	NEW! 2018 M.O.P.A. 1930's/1950's Master Oscillator Power Amplifier Replica   New 2017 M.O.P.A. Model Update: The new 2018 M.O.P.A. Amplifier has just been updated to work with the GB-4000 in both "Audio" and "RF" modes. This revolutionary upgrade now allows users to run all "Auto Channel" frequency programs up to 20 Million Hertz. This is a true breakthrough, as there is not another plasma tube instrument on the market that has this capability! This is the 2018 M.O.P.A. Master Oscillator Power Amplifier Authentic Replica for those who already own a GB-4000 Function Generator and want maximum RF power capability using the plasma tube radiant method of outputting frequencies. The M.O.P.A. is the top-of-the-line plasma tube amplifier capable of 207 watt peak RF power output compared to the SR-4's 30 watts. Each M.O.P.A. is custom-built by hand and thoroughly tested for quality assurance. Unique features of the M.O.P.A. include proven solid-state and vacuum tube technology, built-in frequency counter, and variable RF carrier frequency range of 2.1 MHz to about 3.6 MHz. We include the latest 2018 software and hardware updates and either a 120 volt or 240 volt internal power supply (please specify voltage for your country). 2-year manufacturer's warranty, FREE Technical Support. 10" H x 17" L x 10.5" W. (19 lbs.) Note: Plasma Tube Assembly not included but available from another company for $370 including shipping. (We'll give you the details about how to purchase the Plasma Tube Assembly at the time you place your M.O.P.A. order.) Made in USA. In Stock - Available for Immediate Shipment FREE shipping in the contiguous USA!
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$795  SALE $695	2018 SR-4 Amplifier 1-30 MHz, 30-Watts Peak Power   This is the 1 to 30 Megahertz 30-Watt RF Amplifier for those who already own a GB-4000 Function Generator and want  additional RF power capability. The SR-4 Amplifier connects easily to the GB-4000 using the included BNC cable and boosts the RF output of the GB-4000 from 2 watts up to 30 watts depending the frequency selected (not used in connection with audio mode). The SR-4 Amplifier also features 4 sets of output connectors for added functionality. We include the latest 2018 software and hardware updates, and a power supply (that can be used on either a 120 volt or a 240 volt power system). 2-year manufacturer's warranty, FREE Technical Support. 4.25" H x 10" L x 8" W. (1 lb. 12 oz.) Made in USA. In Stock - Available for Immediate Shipment FREE shipping in the contiguous USA!
$72 with GB-4000 Purchase	GS-72 Golden Section Star Broadcast and Imprinting Plate for Use with the GB-4000 or SR-4   This is the latest broadcast technology for use with the GB-4000 or SR-4 Amplifier, ours exclusive! The GS-72 Broadcast and Imprinting Plate connects easily to the red and black output jacks of the GB-4000 or SR-4 Amplifier. Once connected simply run your frequencies or Auto Channel program of choice in RF Mode and the chosen frequencies are broadcast through the air in an effective radius of 1 to 6 feet. The GS-72 utilizes the latest vortex Golden Ratio geometry technology. The GS-72 can also be used for imprinting frequencies into physical objects such as water, food, homeopathic remedies, liquids, supplements, vitamins, jewelry, crystals, and other similar materials. The GS-72 is available for purchase only from this website and at the time a GB-4000 Package is purchased from this website. (GB-4000 and connecting wires as shown in photo at left not included.) 11" H x 8.4" W. (9 oz.) Made in USA. In Stock - Available for Immediate Shipment
GB-4000, SR-4 & M.O.P.A. Features Flyer (PDF)	GB-4000 New Software Features (PDF)
M.O.P.A. Amplifier Flyer (PDF)	SR-4 Amplifier Flyer (PDF)
GB-4000 Important Notice (PDF)	M.O.P.A. Purchase Agreement (PDF)

Q: Does running multiple frequencies reduce the power level of the frequencies?

A: The answer to that question would be yes. This is why we built the GB-4000 with the ability to output 3.7 watts of peak power at a 100% duty cycle using an RF (Radio Frequency) carrier frequency. Using an RF carrier frequency is the only way the power level could be increased. The original 1950’s equipment could only output one audio frequency at a time with only 1/5th of one watt of power (0.20% of one watt). This power level worked very well with one audio frequency even until today. Logically if you use 2 audio frequencies you would want to double that power level (2 X 0.20 = 0.40% of one watt) to 0.40% of one watt. If you run up to 8 audio frequencies you would want at least 8 times that power level or 1.60 watts of power. This is why the GB-4000 has 2 watts of power output so that it exceeds the power capability needed for running 8 audio frequencies simultaneously at the original 1950’s capability of 0.20 watts of power for one audio frequency. Some people also ask if they can only run multiple frequencies. The answer to that question is no. The GB-4000 gives you the flexibility to switch from running one audio frequency at a time to being able to run up to 8 audio frequencies at a time. You can choose how you want to run the frequencies. Many people want even more power than the 1950’s power levels per audio frequency. If you want more power then you can purchase the SR-4 ten watt amplifier and you will have 1.45 watts of power for each frequency if you run 8 audio frequencies simultaneously. If you decide to only run 4 audio frequencies simultaneously then you would have 2.5 watts of power for each frequency. And if you only run one frequency you can have up to 10 watts of power for a single audio frequency. If you want even more power than 10 watts then you can purchase the M.O.P.A. gas tube amplifier which is a 120 watt instrument. With this instrument you could run up to 8 audio frequencies simultaneously with 15 watts of power for each audio frequency. We look at it as going from good to better to best.

Q: Does the GB-4000 output its frequencies digital or analog?

A: Analog.

Q: Does the GB-4000 use crystal controlled frequencies for high accuracy.

A: Yes it does for the 3.1 MHz RF carrier frequency. The GB-4000 also goes beyond using crystal-controlled frequencies. It also uses digital frequencies output from a DSP (Digital Signal Processor).

Q: How does the GB-4000 frequency Instrument output its frequencies analog when they come from a digital DSP chip?

A: The GB-4000 uses a DAC (Digital to Analog Converter). This type of electronic circuit is used in all modern analog frequency generators. The frequencies are output from a DSP, (Digital Signal Processor) then go through the DAC and then through a low pass or band pass filter and come out converted to analog. These frequencies are phase-locked-looped for perfect accuracy. By this method we have all the harmonic content of the old antique vacuum tube frequency generators along with the digital accuracy. No old antique frequency generator has the frequency accuracy of today’s modern equipment. This method is now the standard in the industry.

Q: Can the GB-4000 frequency machine output RF or Radio Frequencies.

A: Yes. The GB-4000 has a frequency range from .01 to 20 million hertz (20 Megahertz).

Q: What is an RF Carrier Frequency?

A: Any radio station uses a carrier frequency to carry or modulate (piggyback) the audio frequencies, voice or music that is sent out for you to hear on your radio. Modulation is the mixing of the RF carrier frequency with the audio frequencies. So, the RF carrier frequency is the means by which the radio station transmits the signal through the air to you the listener. The GB-4000 goes beyond what most carrier frequencies are designed to do. It produces harmonic sidebands replicating the output of the 1930's, 1940's and 1950's M.O.P.A. style equipment.

Q: Why do most frequency generator manufacturers limit their audio frequency modulation to 1000 hertz?

A: Most likely they just did not want to spend the money to build the circuit with a higher capability. This is just one of the several differences between the GB-4000 and most of the other frequency generators on the market today. The GB-4000 can modulate any frequency from .1 hertz to 999,999 hertz on its carrier frequency.

Q: What is the main difference between the GB-4000 and other function generators?

A: The GB-4000 can output up to 8 audio frequencies simultaneously up to 40,000 hertz.

Q: What is the highest frequency that the GB-4000 can output?

A: 20 million hertz.

Q: Most other manufacturers only have a frequency range to 10,000 hertz. Some go up to 22,000 hertz. The GB-4000 goes to 20,000,000 hertz. Why?

A. It is all a matter of what frequency range the manufacturer wants to cover. The higher the frequency range the more versatile the generator will be.

Q: How much more powerful is the GB-4000 than other frequency generators?

A: Because of the use of an RF carrier frequency the GB-4000 is over 9 times more powerful than most other frequency generators. If the SR-4 amplifier is connected to the GB-4000 it is over 50 times more powerful than other frequency generators that do not use a carrier frequency.

Q: Why should I want the optional Amplifier?

A: The GB-4000 can operate in two different modes. 1: RF Mode, which is the higher frequency mode, 2: Audio Mode, which is the lower frequency mode. In RF mode, the GB-4000 has an output of about 3.7 watts; however, sometimes more power is wanted. The SR-4 Amplifier boosts the 3.7 watt RF output to about 30 watts of peak RF output. Also, the Amplifier has three additional sets of outputs for more hookups. The SR-4 10-Watt Amplifier operates in the RF mode only.

Q: Why was the GB-4000 built to output up to 8 frequencies simultaneously to 40,000 Hertz while most other instruments only output one frequency at a time?

A: It was designed to be a time saving feature.

Q: Does the GB-4000 show the actual frequency being used on the LCD?

A: Yes. The GB-4000 shows the actual frequency on the LCD as long as you are not running multiple frequencies.

Q: Some manufacturers build their instruments with built in rechargeable batteries. Why doesn't the GB-4000 have this capability?

A: The reason the GB-4000 is not battery operated is because of its power output range. Rechargeable instruments only have 28 volts peak to peak voltage output. In the audio mode the GB-4000 is variable and has a range from 0 to about 40 volts peak to peak. In the RF mode the GB-4000 is variable from 0 to over 100 volts peak to peak. Because of these capabilities it is not feasible to put batteries into the GB-4000.

Q. Does the GB-4000 have programmable memory?

A: Yes. It has enough memory to program up to two thousand auto channels holding 48 frequencies each.

Q: What is gating and how does it work?

A: Gating is basically an advanced "pulsing" feature. When turned on it pulses any frequency on and off at the pre-determined gate rate.

Q: Why does the GB-4000 have a 10% to 90% duty cycle range?

A: All high quality frequency generators have this capability because different duty cycles are needed in testing.

Q: Can the GB-4000 sweep between frequencies like all high quality frequency generators?

A: Yes. One of the great features of the GB-4000 is that it is capable of doing two kinds of sweep functions.
1) SWEEP: Allows you to run a specified frequency range of your choosing, one frequency at a time. The instrument sweeps from your beginning frequency to your ending frequency. 2) CONVERGENCE SWEEP: Allows you to run two frequencies at a time over a specified frequency range of your choosing. The instrument sweeps from your beginning frequency to the ending frequency and at the same time sweeps from the ending frequency to the beginning frequency. The result is that the two frequencies sweep towards each other, then pass each other, one going up and the other going down and each ending where the other frequency began.

Q: Why does the GB-4000 have a channel sweep capability which varies the frequency or frequencies from 10 Hertz to 1000 Hertz?

A: The GB-4000 has the capability to sweep when running any of the 2000 programmable auto channels. The new channel sweep covers a variable range from 10 Hertz to 10,000 Hertz. If you are running a frequency of 2000 Hertz and decide that you want a to sweep 1000 Hertz then the sweep will start at 1500 Hertz and will end at 2500 Hertz. This sweep always covers the frequency range chosen with half the frequency range dropping below the targeted frequency or frequencies to half the range going above the targeted frequency or frequencies used. This type of sweep is desirable when you want variability in your frequency or frequencies you are running.

Q: Why do you use a membrane type keypad instead of the contact style?

A: Durability is the main reason. Membrane keypad switches are the industry standard and have been for many years. Almost all electronic devices that have keypads use them. They are built to last for many years. They replaced the contact style because they have fewer problems. They will generally outlast the electronics. We have had this type of keypad on our instrument for over 8 years under heavy use with very few problems.

Q: How long will the GB-4000 last?

A: The GB-4000 is built to last a long time and 99.9 % of the instruments sold over the last several years are still working. Some manufacturers claim that their instrument will last a lifetime. We cannot and will not make that kind of misleading claim. We would be foolish to make such a claim. Any instrument that cannot be repaired, even after years of use, is replaced with the current model for only $800. No other company that I know of offers this kind of replacement in the industry.

Q: Is the GB-4000 easy to use?

A: Yes. Programming the GB-4000 is easy. Running an un-programmed frequency is also easy to do. To run a programmed channel all that the user has to do is press the Auto channel button, then enter the auto channel number using the keypad, then press the Run button. The GB-4000 then will run all the frequencies in the channel. To run an individual frequency all you have to do is press enter then put in the frequency you wish to use and then press run. Anyone can do this three step process.

Q: What is the GB-4000 warranty and return policy?

A: All GB-4000, SR-4, and M.O.P.A. all include a 2-year manufacturer's warranty and FREE Lifetime Technical Support. Instruments may be returned for a refund within with 30 days from the order date less a 20% re-stocking fee and the cost of the original shipping. Customer pays return shipping and insurance costs.