0.5 ... 2039 MHz continuous
4th generation of the BOGER-ELECTRONICS direction-finder including peak value
indicator for bearings from pulsed transmitters including steplessly adjustable HF
attenuator. Left: DF-20 manual direction-finder with fitted aerial for bearings in the
frequency range from 400 to 500 MHz. The broadband receiver with internal
direction-finder modification imounted on the side.
Construction:
Many wishes come true with this manual direction-finder.
The combination of a
broadband receiver with this direction-finder enables precise bearings
to be taken
in a continuous frequency range of at least 0.5...2039 MHz (depending
on the aerial).
Bearings can be taken in all operating modes (NFM, WFM, AM, NAM, LSB and
USB).
The receiver needs the suffix "P".
A stepless 50 Ohm attenuator is fitted in the direction-finder
housing. With
attenuation up to 39 dB, the best deflection of the indicating instrument
with the
mirror type scale is achieved, regardless of the signal level at the time.
This allows
near-field bearings, e.g. in the 2 m band, to be taken on less than 1
m (100 mW
transmitter).
If the aerial signal is too weak, simply switch
on the amplifier. This increases the
gain by ca. 10 dB. A NiCd battery is also fitted in the signal-yellow
impact-resistant
ABS plastic housing for the supply of the indicator electronics. This
enables the DF-
20 manual direction-finder to be used for up to 12 hours. An external
power supply
can be connected to the socket at the side for charging the battery and
running the
unit. This can be between 12 and 14.5 V DC and is thus ideal for motor
vehicles.
The housing is protected against spray water to the
greatest possible extent and is
UV-resistant. The aerial cable and the receiver cable are fed out of the
pistol-style
housing grip. The cable ends are pre-fitted with BNC plugs. The receiver
can be
easily removed from the DF-20 in order to use it for other purposes.