The Volume controller consists of two PCB's and comes fully built and tested. It is intended for upgrading existing equipment or can be applied in your own project.

Volume is switched by 6 Omron G6K relays in 64 steps of 1.0dB by turning the encoder knob.
By pressing the same encoder knob the input can be selected. 
The unit can also be used with a Philips, Marantz or Sony remote control (not included!).

Specifications

Electrical
Input impedance: > 40 k-ohm (actual value depends on volume setting)
Output impedance: < 8 k-ohm (actual value depends on volume setting)
Power: AC or DC, 6 to 10V max, current max 150mA DC, 225mA AC (power connector supplied with module)
Volume setting: 64 steps of 1.0 dB
Channel imbalance: < 0.15 dB
Inputs: 4
Input / Output connectors: Cinch / RCA (can be supplied without connectors on special order)
Remote control: Not included, can be programmed by Philips / Marantz models and most Sony types
Power on/off output: Open collector
 

Mechanical
Main PCB size: 120*58*28 mm (W*L*H)(excludes connectors)
Hole pitch: 111*49 mm (symmetrical)
Display PCB size: 120*20*8 mm (W*L*H) (excludes control shaft)
Hole pitch: 111*11 mm (symmetrical)
Display PCB size can be reduced to : 80*20*8 mm (W*L*H) (excludes control shaft)
Hole pitch: 71*11 mm (symmetrical)
All hole diamters 3.2 mm

DOWNLOAD

Tentlabs Volume Controller Application Notes (PDF)