GB4000 Generator

1 Hz – 20 Million Hz

The widest frequency range of any contact instrument on the market. Most competitors are limited to 400,000 Hz or less — the GB4000 covers the full range used in the original 1930s and 1950s research instruments.

0.01 Hz Accuracy

Crystal Oscillator combined with a Digital Signal Processor, converted to analog before output. Accurate to one hundredth of a Hertz — frequencies are guaranteed not to drift once set.

8 Frequencies at Once

The only instrument in the world capable of running up to 8 audio frequencies simultaneously to 40,000 Hz without frequency degradation. Up to 8× faster than any single-frequency instrument.

Highest Contact Power

4.7W RF output at over 110 volts peak-to-peak — 23 to 47 times more powerful than standard contact frequency generators. Four output connections versus the industry standard of two.

Easiest Interface

Full membrane keypad — every function instantly accessible with no menu scrolling. 875 channels pre-loaded. Frequencies displayed on screen. No hidden program numbers. PC software included.

Complete NZ Kit

Most distributors make you source the generator, accessories, and frequency list book separately. We ship everything together as one complete, tested kit — with NZ-made stainless accessories included.

Full frequency range — 1 Hz to 20 million Hz

Most contact frequency instruments on the market are limited to 10,000–400,000 Hz. The GB4000 covers 1 Hz to 20,000,000 Hz — the full range used by the original researchers across four decades of work. This means you are not limited to using only audio frequencies or relying on harmonic workarounds to reach higher RF frequencies.

Digital precision. True analog output.

There is a persistent debate in the frequency generator market about digital versus analog output. The GB4000 settles it clearly: frequencies are generated digitally for precision, then converted to a true analog signal before they leave the unit. This is the best of both worlds — and it is how every serious frequency generator on the market works, including the GB4000.

The result is a highly accurate analog frequency — complete with all the overtones and undertones of that analog frequency — that can be swept up or down with far more precision than any purely analog tube-type instrument. An old tube generator could only produce 1500 Hz where the GB4000 can produce 1500.5 Hz, or any value to 0.01 Hz resolution. Claims of "advanced analog harmonics" from competitors who use the same digital-to-analog process are marketing hype; spectrum analysis shows all such instruments produce equivalent analog harmonics.

Accuracy, waveforms and sweeps

The GB4000 is accurate to 0.01 Hz — one hundredth of a Hertz. Enter a frequency and that is the exact frequency you get. Frequencies are guaranteed not to drift once set. The original instruments of the 1920s–1940s could not achieve this level of accuracy; today the GB4000 exceeds it substantially.

Three sweep types:

The only generator that runs 8 frequencies at once

To output up to 8 individual frequencies simultaneously, the GB4000 uses one Digital Synthesizing Processor (DSP) and two Direct Digital Synthesizers (DDS). The DSP outputs 1 to 8 audio frequencies simultaneously up to 40,000 Hz. The two DDS units output up to 2 RF frequencies simultaneously from 40,000 Hz to 20 million Hz. All frequencies are then summed together so every frequency runs at the same power level — no degradation regardless of how many are running simultaneously.

Power output — the highest in its class

The GB4000 is 23 to 47 times more powerful than standard contact frequency generators, with over 110 volts peak-to-peak in RF mode. Most standard generators operate at 1/10th to 1/5th of a watt — the GB4000 runs at up to 4.7 watts, giving it ample power to run multiple frequencies simultaneously without any degradation in each frequency's output power.

The easiest interface — built for everyday use

When you are running your frequencies, the last thing you want is to fight your instrument. The GB4000 has a full membrane keypad with every function and number directly accessible — no scrolling through menus, no hidden program numbers. All frequencies display on the LCD as you run them.

GB4000 alone ← You are here

The world's most capable standalone contact frequency generator. Complete, powerful, and ready to run 875 programmes straight out of the box.

GB4000 + SR4

Add the SR4 amplifier to increase contact output to 15W — 75× more powerful — with multiple user hookups.

GB4000 + M.O.P.A.

Upgrade to 190W non-contact plasma tube delivery — hands-free, over 30+ feet.