Panther Series – ED108 ChaQuO
Elby Designs - Laurie Biddulph
9 Follan Close, Kariong, NSW 2250, Australia
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The ED108 – ChaQuO module is constructed
around 2 main boards and 6 Panther Support
boards as shown in the picture to the left.
The 3 boards shown at far left form the Quadrature
Oscillator section whilst those to the right form the
Chaos Generator. As such, each section can be
built and operated as an individual module.
The ED108 panel comprises 4 columns with
printed-circuit assemblies assigned as follows:-
Column Function PCB’s
1 Chaos Generator Control Section ED108 Chaos Generator
2 Chaos Generator Input/Output Section Panther-Pot plus 3 Panther-Carrier
3 Quadrature Oscillator Control Section ED108 Quadrature Oscillator plus 1 Panther-Carrier
4 Quadrature Oscillator Output Section Panther-Jack
Chaos Generator (Column 1 & 2)
Quadrature Oscillator (Coulmn 3 & 4)
As with most pcb construction, start with the smaller, low-profile components such as resistors and diodes
and build up in the height of components. Pay particular attention to the orientation of polarised components
such as diodes, electrolytics and IC sockets. Leave the panel components until last. When the remainder of
the board has been assembled and checked, use the front panel as an alignment guide when installing the
panel components. The anti-rotation tab on any pots needs to be broken off (use a pair of strong pliers to
snap the piece off). Position the panel components on to the pcb and offer the assembly up to the panel.
Check that all the components are sitting square to the panel and then tack each component in to place by
applying a solder blob to a leg on each component. Carefully remove the panel and solder all remaining pins
in to place and re-solder, as required, the tacked pins. Repeat for all boards as required. When installing
Panther-Carrier boards, solder the 4-way header in to the main board checking that it is perpendicular to the
board. Place the (loaded) Panther-Carrier board on to the header and the offer the board up to the front
panel treating the Panther-Carrier board as any other panel component. Again, when satisfied with the
