Broadwave U2K6 Modular Synthesizer

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via this auction

"Up for Auction is my self built BroadWAVE u2K6 (Micro ARP 2600). It is a one-off unit made as a pre-production to an ARP 2600 clone that I have recently completed.

I have set a reserve price at £500 to cover the cost of the initial build and the auction will run to the end - I'm afraid offers will be ignored and returns are not accepted.

Please note that you will require a MIDI to CV converter to use this synth.

It's built into a Tolexed 19" 6U cabinet with strap handle... as yet, I have no idea how to pack this for the courier - don't be surprised it it turns up in a suitcase.

Almost all of the internal circuits are copied directly from the ARP 2600 - the exception being the VCF, LFO and Dual AR envelope generators which are direct copies from the ARP Odyssey.

What does it have that the 2600 doesn't? - A Master CV section (tune all VCO's at once) with 2 FM inputs and Glide, 3 Full 2600 VCO's with sync (sync circuit taken from the ARP Odyssey), and additional AR envelope generator and an LFO with square and sine outputs (tied to the S&H clock frequency), extra multiples.

What's missing? - The 2600 reverb/mixer section and additional FM inputs on the VCO's (sadly, space did not permit these)

The VCF is the 4035 "Moog Infringement" filter from the Odyssey MkII. There is no intrinsic difference between this and the original 4012 VCF from the early 2600 - just a difference in input/output levels... it sounds great : )"

Module and tech details at the auction and captured below.

"OK, here's the tech details (it's a long read but gives an insight to the internal pre patching and what's available:

MASTER CV

Rotary Controls:

Tune
Fine Tune
Glide Amount (NB. Glide is wired POST FM inputs - Will add lag to FM input signals)
FM 1 Level
FM 2 Level

Input Jacks:

1V/Oct
Aux CV
Gate In
FM1 (Prewired from LFO Sine)
FM2 (Prewired from LFO Square)

Output Jacks

1V/Oct CV (Without Glide)
1V/Oct CV (With Glide)
Gate 1 Out
Gate 2 Out
Trigger Out

VCO 1 (ARP 2600 4027-014 Module)

Audio/Low Frequency Switch

Rotary Controls:

Tune
Fine
CV 1 Level
PWM Level
PW (Manual Control of Width)

Input Jacks:

1V/Oct In (Prewired from Master CV 1v/Oct)
CV1 In (Prewired from LFO Sine)
PWM In (Prewired from ADSR Envelope)
Sync In

Output Jacks:

Sync Out
Saw Out
Square Out
Triangle Out
Sine Out

VCO 2 (ARP 2600 4027-014 Module)

Audio/Low Frequency Switch

Rotary Controls:

Tune
Fine
CV 1 Level
PWM Level
PW (Manual Control of Width)

Input Jacks:

1V/Oct In (Prewired from Master CV 1v/Oct)
CV1 In (Prewired from ADSR Envelope)
PWM In (Prewired from LFO Sine)
Sync In

Output Jacks:

Sync Out
Saw Out
Square Out
Triangle Out
Sine Out

VCO 3 (ARP 2600 4027-014 Module)

Audio/Low Frequency Switch

Rotary Controls:

Tune
Fine
CV 1 Level
PWM Level
PW (Manual Control of Width)

Input Jacks:

1V/Oct In (Prewired from Master CV 1v/Oct)
CV1 In (Prewired from Sample & Hold)
PWM In (Prewired from ADSR Envelope)
Sync In

Output Jacks:

Sync Out
Saw Out
Square Out
Triangle Out
Sine Out

MIXER

8 x 1 or 4 x 2 Output switch (Input 1 - 4 levels are shared with Input 5 - 8)

Rotary Controls:

Level 1/5
Level 2/6
Level 3/7
Level 4/8

Input Jacks:

Input 1 (Prewired from VCO 1 Square)
Input 2 (Prewired from VCO 2 Square)
Input 3 (Prewired from VCO 3 Saw)
Input 4 (Prewired from Noise)
Input 5
Input 6
Input 7
Input 8

Output Jacks:

Mix Out 1
Mix Out 2

VCF (ARP Odyssey 4035 "MOOG" Module)

Rotary Controls:

Frequency
Resonance
CV 1 Level
CV 2 Level
Input Level

Input Jacks:

Audio In (Prewired from Mix Out)
1V/Oct In
CV 1 In (Prewired from Master CV 1V/Oct)
CV 2 In (Prewired from ADSR Envelope)

Output Jacks:

VCF Output

VCA (ARP 2600 4019 Module)

Rotary Controls:

Gain
Level 1
Level 2
CV 1 Level
CV 2 Level

Input Jacks:

Input 1 (Prewired from VCF Output)
Input 2 (Prewired from Ring Mod Output)
Linear CV Input (Prewired from AR Envelope)
Exponential CV Input (Prewired from ADSR Envelope)

Output Jacks:

VCA - Main Audio Output

MULTIPLES

1 x 4
1 x 5
1 x 5

PREAMP/ENVELOPE FOLLOWER (ARP 2600)

Gain Switch - X10/X100

Rotary Controls:

Preamp Input Level
Envelope Follower Input Level

Input Jacks:

Audio In Level (Preamp)
Audio In Level (Envelope Follower - Prewired from Preamp)

Output Jacks:

Preamp Output
Envelope Follower Output

RING MODULATOR (ARP 2600 4014 Module)

AC/DC Switch

Rotary Controls:

Level X
Level Y

Input Jacks:

Input X (Prewired from VCO1 Square)
Input Y (Prewired from VCO2 Square)


Output Jacks:

Ring Mod Output

Noise (ARP 2600)

Rotary Controls:

Noise Level
Noise Colour (Continuous - White>Pink>Low Freq)

Output Jacks:

Noise Output

VOLTAGE PROCESSORS (ARP 2600)

Rotary Controls:

Level 1 (+10V Adjust)
Level 2
Level 3 (-10V Adjust)
Lag Depth

Input Jacks:

Inverter 1 - Input 1 (Prewired from -10V - Inverted Output gives 0 - +10V)
Inverter 1 - Input 2
Inverter 1 - Input 3
Inverter 2 - Input 4 (Prewired from +10V - Inverted Output gives 0 - -10V)
Lag Input

Output Jacks:

Inverter 1 Output
Inverter 2 Output
Lag Output

ELECTRONIC SWITCH (ARP 2600)

Input/Output Jacks:

Clock Input (Prewired from LFO/S&H Clock)
In/Out 1
In/Out 2
Common

SAMPLE & HOLD/LFO (ARP 2600 4015 Module - ARP Odyssey LFO)

Rotary Controls:

Sample Input Level
Clock/LFO Frequency

Input Jacks:

Sample In (Prewired from Noise)
External Trigger In (Prewired from LFO/Clock)

Output Jacks:

Sample & Hold Output
LFO Square Output
LFO Sine Output

ADSR ENVELOPE (ARP 2600 4020 Module)

Rotary Controls:

Attack Time
Decay Time
Sustain Level
Release Time

Input Jacks:

Gate In (Prewired from Master CV Gate)
Trigger In

Output Jacks

ADSR Output 1
ADSR Output 2

DUAL AR ENVELOPE (ARP Odyssey)

Rotary Controls:

Attack Time (AR Env 1)
Release Time (AR Env 1)
Attack Time (AR Env 2)
Release Time (AR Env 2)

Input Jacks:

Gate In AR Env 1 (Prewired from Master CV Gate)
Gate In AR Env 2 (Prewired from Master CV Gate)

Output Jacks:

AR Env 1 Output
AR Env 2 Output


That's it - Thanks for looking"