Thomas Henry Mega Percussive Synth

via this auction
Pics of the inside below.
"The Mega Percussive Synth uses three subcircuits (Shell, Impact, and Noise) to create one big/nasty/tasty drum tone. Send and Return jacks at each subcircuit for even more sound shaping possibilites. A State Variable VCF, Ring Modulation, and Passive Mixer are just a few functions of the Mega Percussive Synth. This five unit wide module is PACKED with features/controls to create a vast array of analog drum tones.

Here is a comprehensive list of controls...

Pots

RM Balance
RM VCO Depth
RM VCO Pitch
Trigger Sensitivity
Shell Env Gen Decay
Shell Sweep
Shell Pitch
Shell Pitch CV
Impact Env Gen Decay
Impact Sweep
Impact Pitch
Noise Filter CV *
Noise Filter Env Gen Decay
Noise Filter Env Gen Sweep
Noise Filter Freq
Noise Filter Res
Shell Mix
Impact Mix
Noise Mix
Line Volume

Switches

Trigger / Lock
Shell Modulation: Impact / Noise
Noise Filter State: LP / BP

Audio/CV/Trigger Jacks

Trigger In
Shell CV In
Shell Send
Shell Return
Impact Send
Impact Return
Noise Filter CV In *
Noise Send
Noise Return
Synth Out
Line Level Out

LED Indicators

Trigger Level

* Due to the internal limitations of the Filter IC used in the Noise circuit, external CV's can not be used to manipulate the Noise Filter (Nosie Filter CV Knob and associated Jack have no effect on the sound). Not to worry there are still 19 other parameters you can tweak to get that lush analog vibe you're lusting for :-)

Assembled with:

Super Shallow Module - 2" Panel Depth
11 Switchcraft Jacks
20 Alpha Pots - 24mm Size
20 Alco Clone Knobs
3 Toggle Switches with Black Rubber Switch Covers
Red LED
Large Bridechamber Panel - 5 Units wide
Polyester Film Capacitors
Xicon Metal Film Resistors
Double Plated PCBs with Soldermask
MOTM Power Connector
Runs on +/- 15 Volts

Please note that there is a light scratch on the faceplate between the "Impact Pitch" and "Shell Pitch CV" knobs. The scratch is not through the paint and only visible at certain angles..."