Model L-950
LF Active Loop Antenna
The L-950 LF Active Loop Antenna is a balanced, broadband, peaked lowpass
coaxial design providing exceptional sensitivity and directivity. The L-950
combines a 30dB high gain low noise amplifier with a balun input and with
a heff of 6.6 mm loop input for 200 kHz, a sensitivity of 200 mV/V/m is
achieved. Nulls of greater than 30 dB can be expected with the loop mounted
in the clear. An internal sharp cutoff AM BC filter eliminates BC IMD.
The L-950 LF Active Loop Antenna
is a broadband coaxial wound loop
designed to be used in conjunction with an LF receiver input circuit.
Frequency response is 10 kHz to 500 kHz (broadband). The 24 inch
square PVC loop may be broken down into components for storage. The
loop antenna and receiver may be hand held or mast mounted.
The loop is constructed of multi-turn coax, and is secured to a light weight
24 inch diameter pvc collapsible frame. The antenna preamplifier is
weather protected within a weatherproof housing and powered through the
coaxial feed line. A 12 vdc power supply / coupler interface is provided with
receiver connections.
Specifications - L-950 LF Loop Antenna
Frequency Response:
10 kHz to 500 kHz +/-3dB
(normalized loop response)
Sensitivity:
500kHz: 500mV/ V/m
200kHz: 200mV/V/m
10khz: 10mV/V/m
Loop Amplifier Gain: 30dB
IP3: 30dBm
Loop Nulls: >30dB
Power Requirement: 12 - 15 Volts DC @ 40 mA
Connectors: BNC
Size / weight: 24” square / 12” handle, 1.5 lb
WARRANTY
LF Engineering Co. Inc. warrants that at the time of shipment the L-950 LF antenna
manufactured by LF Engineering Co. is free from defects in material and workmanship.
LF Engineering Co. obligation under this warranty is limited to the replacement or repair
of the product within 1 year from date of shipment.
Copyright 2008 by LF Engineering Co.
All rights reserved
Printed in USA
10
100
200
500
600
kHz
10
5
Ref: 0 dB
-5
-10
-15
2
Ø
300
400
700
LF Loop Response
(induced magnetic field)
2
10
100
400
500
kHz
500
300
200
100
0
200
300
LF Loop Output Sensitivity
for 1 v/m input
mv/1v/m
