Ron Benson's Comments on the Modules

First I'll attempt to describe what the pins on the octal socket do and
then give what I think are some parameters of a few sounds.
    Pins 1 to 2-  Capacitor...Size determines low end cutoff. .001 to .02
works fine. The .02 cuts off virtually nothing and the .001 cuts some. You
could even experiment
with an .0005. Voltage should be around 500 volts.
     Pins 5 to 6- Resistor...100k to 270k low wattage. This determines the
overall balance between treble and bass. 150k is ok...Experiment.
    Pin 7 is ground.
    Pin 6 to 7- Capacitor...Determines bass frequency you are adjusting when
turning bass up... .005 to .05 is ok. Low voltage ok.
    Pin 7 to 8-Capacitor... Determines frequency of treble cut when turning
down treble. .005 to .05 is ok. Low voltage ok.

   Here's kind of what I think a few modules are.

   Module no 1...Jazz sound...pin 1-2. .005 capacitor @ 500 V
                               pin 5-6...150k resistor @ 1/2 watt
                                             pin 6-7.. .0075 capacitor @ low volts
                               pin 7-8..  .005 capacitor @ low volts
   Module no 2...Jazz sound...pin 1-2.. .01 @ 500 volts
                               pin 5-6...150k resistor @ 1/2 watt
                                pin 6-7..  .02 capacitor
                                 pin 7-8..   .02 capacitor

   Module no 3...Rock sound....pin 1-2..  .001 to .005 capacitor @ 500 Volts
                                    pin 5-6....150 k resistor
                                 pin 6-7..   .05 capacitor
                                 pin 7-8..   .05 capacitor
For more center to your sound put 4.7k to 10k resistor in series with the
capacitor from pin 6 to 7.