• Classic passive ring modulator effect!
  • Built-in carrier oscillator with frequency and amplitude control
  • Separate input, carrier and output jacks
  • Plug in any source — keyboard, synthesizer, guitar, voice, etc.
You have probably heard a ring modulator in use, even if you have never heard the term. It was most famously used to create the voice of the Daleks on Doctor Who. Two incoming signals (referred to as the input and carrier) are multiplied and the output is the sum and difference of the two frequencies. Most often, a sine or triangle wave is used for the carrier signal. When modulating a voice, the effect sounds "robotic" and is similar to a  (in sound, not operation). There are tons of effects that can be achieved by varying the two input signals. Using the same signal for the input and carrier has the effect of multiplying the frequency. You can also feed in a dry signal for the input and use the same signal through a delay for the carrier. Lots of combinations can be used to get a variety of effects. There are many different circuits use to create digital ring modulators, including using DSP (digital signal processor) chips. This one is the classic passive ring modulator which uses nothing more than two audio transformers and four germanium diodes - and no power. That is why it is called a passive ring modulator. There is also an on-board triangle wave oscillator for the carrier signal that is switched off when you plug a source into the carrier jack. The four germanium diodes used in the Ring Modulator are hand matched. We order 200 at a time and test the electrical characteristics of each diode to make sure that every set is symmetrical. Design Notes The circuit board was designed for versatility. It can be used either bare-board, or mounted. The jacks, knobs and switch all face one way for easy mounting in an enclosure or rack panel. A drill template is included with the kit. The on-board oscillator can be powered either by a 9 volt battery, or by 12 or /15 volts. For  powered modular systems, just add a 10-pin header. You can even cut the board in half if you want only the passive ring mod section and not the oscillator!  

Product Specs

Brand New (New)
Ring Modulator

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Foxtone Music
Joined Mar 2016
Minneapolis, MN, United States

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Foxtone Music

Minneapolis, MN, United States
Joined: Mar 2016

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Delptronics Ring Modulator Eurorack Module
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