Technical Projects Beltpack BP1 BP1 Performance, Durability, Value, Compatibility. Performance: The BP1 portable headset station may be worn on the belt or hung on the wall by its sturdy belt-clip. Soft plastic strips on the under side help hold it in place when set on top of a console. The matte black finish minimizes visibility. Frequency response has been carefully shaped to optimize both intelligibility and long-term listening comfort. A mic. limiter circuit reduces over load distortion. The high bridging impedance ensures that system and sidetone levels do not vary as other stations are switched in and out of the circuit. The top (front) panel contains controls for switching the micro phone on and off, for controlling listening level, and for signaling. They are easily identifiable by touch, in the dark. A recessed, screwdriver-adjust control is provided for varying the level of the user’s voice to be heard in his own ear phone (Sidetone). A long-life, extremely bright, 4-segment LED serves as the signal light. The back (bottom) panel pro vides a 3-pin female XLR for connection to the system; a 3-pin male XLR for looping onwards to the next station; a 4-pin male XLR for connection of any standard communications head set; and a switch for choosing between dynamic or electret head set microphone. Durability: The ribbed, extruded aluminum case; glass-filled nylon end bezels; internal support system for the PC board; best-quality XLR-type connectors, and recessed controls, all contribute to the outstanding ability of the BP1 to with stand rough usage. Value: The comparatively low price of the BP1 is made possible by the minimized assembly cost resulting from simplicity of design & construction. Simple construction also affords the use of higher quality components, and increases the ease (thus lowering the cost) of servicing. Compatibility: The BP1 is plug-in compatible with Clear-Com® and other popular headset intercom systems Technical Specifications: Power requirement: 24~30VDC, 10 mA quiescent, 30mA max. (with signal lamp lit) Head phone out put: 8~4KW acceptable, 200W ideal Microphone input: 200W Dynamic or 1.2KW electret Sidetone rejection: >50dB Audio bridging impedance: 200W unbalanced Size: 3.70 x 4.30 x 2.50 in. (93.98 x 109.22 x 63.5 mm) Weight: 13.5 oz. (0.385Kg>)
