Category: Main > Miscellaneous Equipment > Other

Doppler Systems 5900 Mobile Radio Direction Finder  - $1,200 Listing ID: 26659

Classified Info

Listing Began: Sep 28 11:23
Number of Times Viewed: 490


  • Display.jpg
  • 20200925_165115.jpg
  • Drawing.jpg
  • Untitled.jpg


Seller's Comments and Description:

The RF frequency range is 52 to 1000 M Hz.
The system accuracy is 5 degrees.

This 5900 series radio direction finder is a modular system intended primarily for mobile operation.  The bearings appear on a small display unit that can be attached to a vehicles windscreen.  This is connected to a processor unit, fed from a RF summer and receiver mounted elsewhere in the vehicle.  Signals are provided by a simple antenna system on the roof.

The modular nature of the RF Summer with TNC connectors enables custom made mobile antennas to be connected.  It can also be used for fixed site DF applications where automatic triangulation is not required.

This system consists of:

DDF5931A    DF Processor

DDF5921A    Remote Display

DDF5980B    Mobile RF Summer

Including all cables and connectors.

The only two items that are required to complete the system is a narrow band FM receiver and the antenna.  Any good quality receiver/scanner or transceiver with an audio output connector will be suitable. For mobile use, four whips are required to be arranged ¼ wavelength apart.  They can be magnetic ¼ wave whips, antenna bases mounted on the vehicle’s roof or on a removable ground plane attached to roof racks.

A link to the full specifications is:

Only used for demonstrations and in excellent condition.

Would consider trading the system for an AOR SR2200 receiver.



Manufacturer Doppler Systems
Model 5900 Series
Condition of Item Excellent
Accessories Included All cables
Postage / Freight Buyer Pays


<< Previous