M166 · RTO-144 Connections
M166 - Active Summing Amplifier · series S400-LINE · 15 contacts, single row
Rear connector
Inputs and outputs
Audio connections · RTO-144 A / B
| Port | Signal | Dir | Pin + | Pin − | Pad + | Pad − |
|---|---|---|---|---|---|---|
| A1 | INPUT | in | 1 | 2 | — | — |
| B1 | OUTPUT #1 | out | 10 | 11 | — | — |
| B2 | OUTPUT #2 | out | 13 | 14 | — | — |
Power · bench PSU
| Rail | Style | Volts | Max A | Supply | Ground | Link |
|---|---|---|---|---|---|---|
| VCC-AUDIO | — | 48 | — | 15 | 12 | — |
Other pins
| Signal | Pins |
|---|---|
| SHIELD GND | 7 |
Source: Ward-Beck drawing 166-02-002 iss. 2 (Feb 1970), M166 active summing amplifier plug connections. Verify against the module before wiring.
WBS Ward-Beck Systems Ltd.
Title
M166 RTO-144 connections
Drn.
make_rto144.py
Date
Oct 22 2026