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Delptronics ThunderBell Analog Cowbell

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Description
The Delptronics ThunderBell is a classic analog cowbell sound. The circuit is inspired by the great cowbell sound in the Korg KR-55. Like the KR-55, the TR-808, and most other analog drum machines, we model a cowbell by using two tuned square waves. We also include some pseudo-ring-modulation, as did the KR-55.

Tunable

In the old drum machines, the cowbell was not tunable. Newer cowbell modules give you knobs to tune the two square waves. However, if the two frequencies are not in the correct relationship to one another, then it does not sound like a bell at all. The Delptronics ThunderBell keeps the two waves in the proper relationship across a wide freqency range. So, it is a truly tunable cowbell. There is also some room at the lower end where the sound gets weird and fun, if not bell-like. The ThunderBell also gives you broad control of the decay, so you can create short "tinks" or long "dings".

Voltage Controllable

The ThunderBell Eurorack Module gives you voltage control of both the pitch and decay. The CV inputs are 0 to 5V and cover the whole range of the module's sounds, it is not 1V/octave. We also include a trigger button so you can throw a bell into your mix whenever the mood strikes you.

The ThunderBell in a Cowbell (or mini kit) has an analog gate input and pitch voltage control input. Both pitch and decay are controllable with knobs, and of course there is a trigger button.

The Kits

The ThunderBell kit comes in two versions: Module and Mini. The Mini circuit board is used in our ThunderBell in a cowbell. The table below details the differences between the two kits. The main difference is that the Module kit includes extra parts to amplify the output up to synth levels and for voltage controlled decay.
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Technical Specifications
Type: Analog
Synthesis: Oscillator(s)
Oscillators
Oscillators: 2
Waveforms: Square
Osc Modulation: Envelope, Input, Knob, Ring Modulation
Envelopes
Envelopes: 1
Evelope Paramerters: Attack, Decay
Polyphony & Tuning
Polyphony: 1
Timbrality: 1
Tuning: Standard
Modes: Mono
Case
Case: Desktop
Controls: Buttons, Knobs, Mod - Wheel 2, Modulation 1/4" Jacks
Dimensions (WxDxH): 3.1 x 2.3 x 3.7 inches
Connections
Audio Output Connections: 1/4" Phone Jack, Mono Out
CV Ports: CV IN, Trigger In
Power: 9V battery
Production
Year Released: 2015
Manuals & Documents

Product Links
Company Product Sites:
[+] delptronics.com
Pricing
MSRP List Price: $50 kit, $77 built, $107 built+speaker - convert
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