Instructions)

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Etherwave® Plus Field Upgrade Instructions

The Etherwave Plus Field Upgrade is an advanced project for upgrading a standard Moog Music Etherwave theremin

to the Etherwave Plus. The new features of the Etherwave Plus include:

• Pitch CV Output – The Pitch Antenna can act as a CV (Control Voltage) controller for any external CV compatible

device, such as Moogerfooger® analog effects, the Minimoog Voyager® analog synthesizer, the Little Phatty® analog

synthesizer or the Moog Guitar. The Pitch CV is generated from the pitch of the theremin waveform. Nominal output

is -2.5V to + 4.5V. Zero Volts is output when the theremin produces a pitch one octave below middle C (approx.

131Hz). The Pitch CV output is factory-calibrated to produce a change of 1 Volt per octave change in the theremin’s

pitch.

• Volume CV Output – The Volume Antenna can act as a CV controller for any external CV-compatible device. The

Volume CV output is generated from the same CV signal used internally for the Etherwave’s VCA circuitry. Nominal

output is 0 to +10V.

• Gate Output – The Gate signal can be used as a signal to start envelopes, trigger sample and hold circuits or other

timing related activities.The Gate signal is generated when the Volume CV rises above 0 Volts AND when the ther-

emin audio is greater than 0 Hz. OFF is 0 Volts and +10V is ON.

• Headphone Output with headphone volume control – can be congured with an internal jumper for normal or

“pitch preview” function.

• Power Indicator LED - indicates when the unit is on and ready to play.

This User’s Guide only describes the installation of the upgrade and the use of the added functions of the Etherwave

Plus. For information regarding the operation of the Etherwave Plus’ basic theremin functions, please refer to the Sec-

tions “Setting Up and Playing the Moog Music Etherwave Theremin” in the Etherwave Theremin User’s Manual. The

manual also assumes knowledge of basic theremin functions and terms.

The Upgrade

The upgrade procedure requires the following skills:

• Use of basic hand tools

• Precision drilling of three 1/2” holes with 7/8” counterbores into the wooden cabinet.

• Soldering wire harnesses and panel components to a PCB (Printed Circuit Board).

• Calibration of the Etherwave.

Caution: If you do not have these skills, then we recommend the Etherwave Plus factory upgrade

for your Etherwave.

Tools and materials required for the Upgrade:

• Drill press or hand drill

• 7/8” Forstner drill bit

• 1/2” drill bit

• Center punch for marking location of holes to be

drilled.

• Scotch or masking tape

• Soldering iron appropriate for electronics assembly

• Solder appropriate for electronics assembly

• #2 Phillips screwdriver

• Small athead screwdriver (1/8”)

• 15mm socket

• 11mm nutdriver, socket or wrench for installing pots

• 1/2” nutdriver, socket or wrench for installing jacks

• Wire cutters

• Wire stripper (for 22AWG wire)

• Voltmeter

• Calibration tool (included with kit)

• ESD-safe work bench

Getting started

Before you begin, verify the following parts are included in the kit:

(1) 11-213 PCB assembly

(3) 15mm nylon hex nuts

(1) Etherwave Plus Front Panel

(1) 5-wire harness

(2) 50K linear taper potentiometers (labeled 50KB) w/ hardware: lockwasher, washer, and nut.

(2) 5K linear taper potentiometers (labeled 5KB) w/ hardware: lockwasher, washer, and nut.

(1) 50K audio taper potentiometer (labeled 50KA) w/ hardware: lockwasher, washer, and nut.

(1) #6 Locking terminal

(1) LED

Summary of content (12 pages)

PAGE 1
Etherwave® Plus Field Upgrade Instructions The Etherwave Plus Field Upgrade is an advanced project for upgrading a standard Moog Music Etherwave theremin to the Etherwave Plus. The new features of the Etherwave Plus include: • Pitch CV Output – The Pitch Antenna can act as a CV (Control Voltage) controller for any external CV compatible device, such as Moogerfooger® analog effects, the Minimoog Voyager® analog synthesizer, the Little Phatty® analog synthesizer or the Moog Guitar.
PAGE 2
(1) LED spacer (2) 1/4” TRS Jack assemblies w/ hardware: lockwasher, washer, and nut. (1) power switch (1) knob (1) calibration tool The Etherwave Plus Upgrade is divided into 4 basic parts: • Disassembly of the Etherwave • Drilling the holes for installing the 11-213 PCB assembly • Installing the Upgrade • Tuning and testing Please read and understand all the steps below before proceeding. A note about ESD ESD stands for Electrostatic Discharge.
PAGE 3
Drilling the holes for the 11-213 PCB The drilling of the holes for the 11-213 PCB involves marking the location of the holes, counterboring three 7/8” holes and drilling a 1/2” hole through the cabinet at the center of each counterbore. A counterbore is a term for a hole that is not drilled completely through a surface and forms a cylindrical cutout in the surface that is drilled. The bottom of a well made counterbore should be flat.
PAGE 4
Installing the Upgrade This part of the installation requires soldering. Before you begin, you will need to have your soldering iron powered up and at an appropriate soldering temperature. 1) Select the 5-wire harness. Make the following solder connections to the 11-211 PCB (shown in figure 4): Yellow Orange Red Brown to to to to AUDIO AMP OUT AMP IN VCA OUT figure 4 2) Solder the Black wire of the 5-pin harness to the #6 locking terminal (see figure 4).
PAGE 5
figure 5 7) Install the 11-213 board into the cabinet with the three 15mm nylon hex nuts. 8) Install the following panel components into the front panel locations listed (shown in figure 6). For the pots and jacks, use a lockwasher between the component and the inside of the panel.
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figure 7 10) Slowly place the panel onto the front of the cabinet so the potentiometer leads stick through the appropriate pads on the 11-213 PCB (shown in figure 7). 11) Holding the panel in place, flip the unit over and install the three screws that fasten the panel to the bottom of the cabinet. 12) Reinstall the mic stand adapter. 13) Turn the unit over. Solder the pot leads to the PCB.
PAGE 7
Tuning and Testing With all the components installed and connected, the next step is to make adjustments to the Etherwave’s tuning, and try out the new features. 1) Install the theremin antennas. 2) Install the theremin on a mic stand. 3) Connect the Audio out to an amplifier. 4) Connect power. Turn the Etherwave Plus power on. The Power LED should light up red. If not, turn the power off and see the troubleshooting section of the manual. 5) Set the Pitch tuning control to 9:00.
PAGE 8
What is a CV? CV stands for Control Voltage. In analog electronic musical instruments, it is a type of low-current electrical signal used to continuously modulate a musical parameter. In the Etherwave theremin, the simplest example of a CV is the control of the instrument’s volume by the Volume Antenna. The Volume Antenna circuitry generates a CV that increases as the left hand is pulled away from the antenna. This CV is applied to the control input of a Voltage Controlled Amplifier (VCA).
PAGE 9
tones generated by the Ring Modulator as both the pitch of the Carrier Oscillator and the theremin audio are changing. Note: for more information on the operation of the MF-102, refer to “Understanding and Using your MF-102 Ring Modulator” manual, available on our website www.moogmusic.com. For an even more intense effect, try the following changes to the previous setup: • Connect the Volume CV Output to the LFO Rate Input of the MF-102. • Now set the Mix and LFO Amount to full clockwise.
PAGE 10
Troubleshooting: ﬁgure 10 Power LED does not come on. Check the power connection. Measure the +12 and -12 Volt test points to verify the correct voltages. Check that the LED is soldered in correctly. Check that the 10-wire harness is soldered and connected correctly. Check for shorts or solder chips ﬂoating around inside the unit. No Audio Output Is the Etherwave Plus on a table? If so, mount it on a mic stand. Verify that no objects are close enough to the Volume antenna to turn off the audio output.
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This edge should be lined up with the front edge of the cabinet on the bottom of the cabinet. These three holes should line up with the holes drilled for the front panel 1) Cut out the rectangle below. Be sure to use a straightedge and cut the bottom edge accurately. 2) Prepare three small pieces of scotch or masking tape to fix the template in place. 3) Line the bottom edge of the template up with the front panel edge of the cabinet.
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