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Radio Direction Finder
- this page is a stub
DF-6 is a mobile radio direction finder (RDF),
based on the Watson-Watt principle with
Adcock antennas,
introduced around 1999 by Datong in Leeds (UK).
The device is based on an existing ICOM R-7000 receiver, 1
and is suitable for the reception of continuous AM, FM and
SSB signals.
It was used by amateurs as well as by law-enforcement agencies
for finding clandestine stations.
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The image on the right shows the later DF-6B variant of the receiver.
It is housed in a grey metal enclosure, of which about 2/3rd of the front
panel is taken by an ICOM R-8500 receiver, which has been modified for this
application.
To the left of the R-8500 receiver is the bearing display (rose), some
additional controls, and sockets for extenstions. The device can be fully
operated from the front panel, but in a mobile environment the use of the
DFC-2 controller-display is recommended. This external control unit is
similar to the DFC-1
of the DF-5 receiver.
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Unlike the Datong DF-4 and DF-5,
which were based on the
correlative interferometer principle,
the DF-6 is not suitable for locating tracking
beacons that feature pulse transmission. It is merely intended as an affordable
alternative to regular direction finders that are used for
locating (illegal) transmissions and other sources of
radio frequency interference (RFI).
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Later versions, like the DF-6B, were based on the ICOM R-8500.
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© Crypto Museum. Created: Wednesday 03 February 2021. Last changed: Monday, 06 September 2021 - 12:21 CET.
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