DOPPLER D/F INSTRUMENTS

A DOPPLER - TYPE VHF RADIO DIRECTION FINDER
FOR HAMS, HOBBYISTS, AND EXPERIMENTERS

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COMPLETE technical information is provided here. Theory, schematics, parts lists, etc.
PC boards are available, either bare or assembled / tested... see [OPTIONS] for prices.

( Or make your own... all the PC board artwork is provided here, too... )

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NEW !... An 80C52 / BASIC - 52 single board computer ( added 12 May 2001 )
NEWER!... An IBM/PC download program for the SBC ( added 16 June 2001 )

( Not really related to "DF stuff", but pretty neat ! )
Includes an 8K BASIC interpeter, RS232 port, and onboard EPROM programmer
Also has room for an 18 pin PIC chip, for I/O.

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The Doppler DF has various configurations and options :

The basic Doppler unit with 16 display LEDs, relative bearings.
A digital readout 3 digits, relative bearings.
A serial RS232 output ( Agrello DF format, APRS compatible )
HOT !... Display software for IBM PC's ( free downloads ) with a simulation mode.
WARM !... Display software for Palm PDA's ( free downloads ) with a simulation mode.
An electronic compass to "North stabilize" the computer displays... VERY useful.
A miniature antenna array radome enclosed, to 1 GHz.( 11 November 2000 )

MAGDOPP PIC program reports DF bearings in magnetic degrees. ( added 2 March 2001 )

... And a few other goodies ...

A portable TDOA unit with acoustic feedback, to keep your hands and eyes free.
Doppler theory, including some stuff you'll never see anywhere else..

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[Deutsche Partner-Seite von Bob's WB6EYV Doppler-Peiler]

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THE BASIC DOPPLER UNIT :

[INTRO] [PRINCIPLES] [CIRCUIT] [ANTENNA] [TESTING] [INSTALL] [TIPS] [PARTS] [DRAWINGS]

[PHOTOS] [FIELD TESTS] [CAVEATS] [OPTIONS]

A DIGITAL READOUT OPTION IS DESCRIBED HERE :

[ DESCRIPTION ] [ CIRCUIT ] [ INSTALL ] [ TESTS ] [ PARTS ] [ DRAWINGS ]

A SERIAL RS232 OPTION IS DESCRIBED HERE :

[ DESCRIPTION ] [ THE PIC CHIP ] [ THE PROGRAM ] [ SOURCE CODE]
[ OBJECT CODE ] [ IBM DISPLAY SOFTWARE ] [ PALM DISPLAY SOFTWARE ] [ DRAWINGS ]

AN ELECTRONIC COMPASS OPTION IS DESCRIBED HERE :

[ DESCRIPTION ] [ CIRCUIT ] [ PROGRAMS ] [ PARTS] [ NOTES]

AN IMPROVED / MINIATURE "RADOME" ANTENNA IS DESCRIBED HERE :

[ DESCRIPTION ] [ CIRCUIT ] [ PHOTOS ] [ PARTS] [ DRAWINGS ]

AN 80C52 SINGLE BOARD COMPUTER IS DESCRIBED HERE :

[ DESCRIPTION ] [ SOFTWARE ] [ PC BOARD ] [ PARTS] [ DRAWINGS]

A PORTABLE D/F IS DESCRIBED HERE :

[ INTRO ] [ CIRCUIT ] [ DETAILS ] [ PARTS ] [ DRAWINGS ]

AND MORE DOPPLER THEORY IS PROVIDED HERE :

[FILTERS] [PULSES] [INTEGRATION]

THIS PAGE VISITED TIMES SINCE OCTOBER 1999

LAST UPDATE : 15 NOVEMBER 2001 [UPDATE HISTORY]

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