Non-ContactMaximum Power
GB4000 + M.O.P.A. Combo
The GB4000 paired with the M.O.P.A. — Master Oscillator Power Amplifier. Up to 190W non-contact output through a noble-gas plasma tube over a 30+ foot range. Sleep, work, or move freely while it runs.

M.O.P.A. Specifications
Power output20W–190W variable
DeliveryNon-contact plasma tube
Range (no reflector)30+ feet · 360°
Range (with reflector)40+ feet · 180° focused
RF carrierVariable 2.2–3.8 MHz
Harmonic sidebands100+ simultaneously
Plasma tubeNoble gas · Pyrex · touchable
Tube lifespanTens of thousands of hours
Circuit~90% solid state + 812a tube
Frequency range1 Hz – 20,000,000 Hz
Operating24/7 · no overheating
What does non-contact mean?
Instead of electrodes, the M.O.P.A. broadcasts frequencies through the air via the plasma tube. No wires, no contact — be anywhere within its range.
Complete kit with plasma tube included
The plasma tube supplied with our M.O.P.A. kit is matched and tested specifically for the M.O.P.A. circuit. Unlike buying through anywhere else — where the plasma tube must be sourced separately from a third-party supplier — our kit includes the correct tube, ready to go, in one order.
190W — almost 2.5× more powerful than the original 1936 instrument
30+ foot range without reflector (360° all directions)
40+ foot directional range with the removable reflector (180°)
Variable RF carrier (2.2–3.8 MHz) — exclusive to the M.O.P.A.
Over 100 harmonic sidebands simultaneously
Plasma tube is touchable — no high-voltage EM field
Use while sleeping, working, cooking, or moving freely
2-year warranty · Lifetime support on the instrument
See the M.O.P.A. in Action
Disclaimer: The GB4000 is a frequency generator and not a medical device. For educational purposes only.