VHLF Hydrophone

The VHLF is a low frequency hydrophone that is used for general purpose audible range monitoring. The VHLF operates within one of two frequency ranges. The VHLF-10 operates between 10Hz and 20kHz; the VHLF-200 operates between 200Hz and 20kHz.

The VHLF does not connect to a VEMCO receiver and must be connected to a seperate system and powered externally.

SPECIFICATIONS:

Operating Frequency:	VHLF-10:  10 Hz to 20 kHz
	VHLF-200:  200 Hz to 20 kHz
Midband Sensitivity:	-147 dB re 1V/uPascal
Horizontal Beam Pattern:	Omnidirectional
Vertical Beam Pattern:	Equal to 1.5 inch line (omni below 20kHz)
Maximum Depth:	100 m
Pre-amplifier Gain:	40 dB
Supply Power:	12 VDC @ 10mA
Cable:	10 m - Polyurethane with three conductors
Dimensions:	32 mm diameter x 153 mm length

Connecting the VHLF to a public address system:

NOTE:  The user MUST terminate the signal with a 100 kiloOhm resistor.