GB-4000 Sweep/Function Generator & M.O.P.A. Oscillator Amplifier


The 190-watt M.O.P.A. Amplifier works with the GB-4000 in both "Audio" and "Radio Frequency" modes. Users can 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!


  • 2020 version including latest upgrades/software (Rev. D8). 
  • The M.O.P.A. amplifier is 20 Megahertz capable with a variable built-in carrier frequency of 2.2 to 3.8 MHz and is a 1930s/1950s replica. When connected to the GB-4000 it is capable of outputting 8 frequencies simultaneously.
  • A full 2-year manufacturer's parts and labor warranty.
  • FREE lifetime technical support and professional training consultation.
  • The Plasma Ray Tube antenna with reflector and stand is not included but is sold separately by another vendor for $335 + shipping.
  • A GB-4000 Accessory Kit also available from another vendor for $122 + shipping. The kit includes a complete guide (261 pages) for the selection and use of specific resonant frequencies, 4 stainless steel electrodes with terrycloth sleeves (which are plugged into included wires) to use optionally with the GB-4000 by itself, when needed.
  • We will facilitate these two separate vendor orders for you if requested.

GB-4000 / M.O.P.A. Combo

$4,445.00 Regular Price
$4,220.00Sale Price
  • We must receive a signed M.O.P.A. Purchase Agreement before we can ship the M.O.P.A. amplfier to you. A copy of the agreement will be emailed to you after you've placed your order or you can download a .pdf copy from this website.

DISCLAIMER: We do not call our instruments Rife Machines or a Rife Machine like many other companies do. Dr. Rife specifically stated that he "did not want his name put on any machine" because "some people" might use his name to sell their frequency machines. Those companies who respect his wishes do not call their machine a "Rife Machine." The function generator and amplifiers on this website are sold as electronic test equipmentInformation disseminated on this website is public knowledge for educational and research purposes only. It should not be construed as any type of medical advice and you accept responsibility for any actions you may take. No suitability, claims or merchantability for any recommended purpose or use is stated or implied. This website is available to help you research and learn more about frequency generating machines. The manufacturer of this equipment is in no way responsible for the information supplied, or use of the products, for anything beyond your personal research. No statements on this website have been evaluated by the Food and Drug Administration.

Any product mentioned or described on this website is not intended to diagnose, treat, cure, or prevent any disease.

© 2021 New Hope Technologies, Inc. All Rights Reserved.