LF Engineering L-400B Manual

L-400B LF Active Gain Antenna

Product Warranty

LF Engineering Co. warrants that, at the time of shipment the products
manufactured by LF Engineering Co. are free from defects in material
and workmanship. LF Engineering Co. obligation under this warranty is
limited to replacement or repair of such products within 1 year from the
date of shipment.
For sales or return authorization,
contact LF Engineering Co. at (860) 526-4759.
LF Engineering E-mail address: sales@lfengineering.com
Copyright LF Engineering Co.
All rights reserved.
Printed in U.S.A.
LF Engineering Co.
17 Jeffry Road
East Haven, CT 06513
L-400B LF Active Gain Antenna
The L-400B active gain antenna is a compact 26
inch antenna designed specifically for the VLF
and LF spectrum. The L-400B may be used with
all receivers and converters.
The L-400B broadband design enables you to
effectively receive the whole LF spectrum from 10
kHz through 500 kHz without the need of a tuner.
The L-400B has very high E field sensitivity with
the advantage of excellent BC intermodulation
rejection with its sharp roll off filter.
A proprietary gain amplifier and low pass filter
makes the L-400B a compact and
totally sealed probe (no whip). The
antenna is omni directional allowing
for various installation
configurations and for use as a
portable antenna. The L-400B
probe is waterproof and UV
resistant.

L-400B Specifications

Antenna Probe Size 26 inches long, 1 inch dia.
Coupler Size 4.19"L x 2.74"W x 1.57"H
Filter Rejection > 40 dB above 600 kHz
E Field Sensitivity -3 dB @ 250 kHz
Low Pass Filter Response 10 kHz to 500 kHz
IP3 24 dBm
Internal (E probe) Amplifier Gain 20 dB
Input/Output Jacks RCA
Operating Temperature -25
Weatherproofing Antenna probe tested to -2 atmospheres (-66 ft)
DC Power: 12 - 18 Volt, 20 ma, NEDA (2) or equivalent battery
AC Power: (included) 120 vac / 12 vdc power pack with 2.5 mm plug

Features

10kHz to 500 kHz
broadband coverage
(no tuner required)
50 ft of RG174/U
with RCA connector
included.
No BC intermod can
be detected even 1/4
mile from a 5 kW
broadcast station
The antenna probe
is fully sealed and
does not use a whip
antenna
Extended ESD and
RF protection
Mounting clamp
included
Dual source power
design: Internal 9
volt battery (x2) or
external 120 vac /
12 vdc supply
(included)
0 0
F to +120 F