All about it
The "Warriewood" Model 2102 Panner is our first entry in the "Postcode series": reissues and reimaginings of classic circuits, with an aim to make them more accessible. This is inspired by a panner circuit from the late 1960s that is now extremely, extremely rare (as in less than ten originals known to exist!), but is in fact a simple circuit that is a fun DIY build.
It is an ingenious circuit that uses JFETs as VCAs, which is a circuit technique common in guitar pedals but pretty much unknown in the synth world, with the exception of the Gristleizer.
It does not give constant power panning, and it distorts when overloaded or near cutoff, but it is very musical. Because each channel is individually controllable, it has the bonus feature of working as voltage-controlled 2-input, 1 output mixer should that be desired.
The mode switches allow you to tailor the response. When a single function generator controls both CV inputs, and both switches are on the same setting, the two signals will "ping-pong" between the outputs. When a single function generator controls both CV inputs, and the switches are in opposing settings, the signals will follow each other. When different function generators control each CV input, and the switches are in opposing settings, it can be used as a 2-in, 1-out, voltage controlled mixer.
This unit has an onboard +24V regulator to generate the authentic onboard voltages (this can be left out of DIY builds where it will be used with systems having a +24V supply). It has a c.v. scaler circuit for each channel to scale modern +10V function generators to the +15V required for proper operation-DIYers using the module in a 100-series or "black-knob-era" 200 system can easily bypass this. And to make it even easier for DIYers, there is a FET testing circuit built into the PCB to allow selection of JFETS, and enough space for either Mill-max or Winslow Adaptics transistor sockets
-15V: not required
+5V: not required
+12V: TBC, only required when generating +24V onboard.
+24V: Can be used in DIY builds if present in your system.
Buchla-compatible (4U, quarter-panel) single unit
38mm depth below mounting rails with connected power cable
User manual on its way!
Watch this space