Jump Links to equipment on this page
PicoDopp Basic DF
GoogleHunt Display Program
DoppSite Display Program
WinDopp Display Program
IBM Display Program
PDA Display Program
FoxPlot PDA Program



Jump links to equipment on other pages
PicoDopp Pelorus display
PicoDopp Numeric display
PicoDopp MultiDisplay PicoDopp MiniAntenna NorthUp Compass
SquawkBox Transmitter
MicroHunt Transmitter
PicoPlot RSSI DF
WinPlot Display Program
FlightDopp UAV/RPV DF
MicroBeacon APRS TX

Background information
About T-hunting
More About T-hunts
About Doppler DFs
About PalmOS PDAs
About us

PicoDopp DSP / GPS Doppler DF : US$ 169

    The PicoDopp DF is an economical but very sophisticated Doppler DF "kit" with a GPS input, RS232 and IrDA ( infrared ) outputs. "Local" display boards are optional, see OPTIONS page for details.

    Free display programs ( see below ) are provided for IBM PCs and for ( cordless/handheld ) PalmOS PDA displays. Free "map display" programs ( GoogleHunt for mobiles, DoppSite for base stations ) are also provided below.

    PicoDopp Includes six assembled / tested PC boards : MAIN board, ANTENNA board and four TERMINATION boards. ( one for each of four antennas ) Completion work is required by the user, to finish the DF. Guidelines for the completion work are provided. ( see link below picture )

    The user must provide an FM reciever, enclosures, an antenna platform, a display computer, ( IBM or PDA ) and interconnecting cables. The SunningHill display program further requires a GPS reciever with NMEA 4800 baud output.

  • Microcomputer / DSP Doppler DF
  • GPS input for "moving map" IBM PC display
  • RS232 output for IBM PCs ( Agrello format )
  • IrDA output for PalmOS PDAs ( cordless/handheld DF display )
  • Uses Joe Moell Wideband Antenna design
  • Free display programs, for IBM PC and PalmOS PDA
  • 7-12 VDC operation, 30 mA
  • Compatible with APRS software
  • Optional "local" display boards available
  • Optional MiniAntenna available
  • Optional NorthUp compass available
  • Assembled and tested : US$ 169
    GoogleHunt GPS / DF Display Program : FREE

    The GoogleHunt "map plotting" program accepts PicoDopp DF + GPS messages and plots them on a ( free / popular ) GoogleEarth display window. Manual latitude / longitude and DF bearing inputs allow operation without a PicoDopp DF. Up to 100 plot points allowed, and hunt results are saved in archive files.

    GoogleEarth normally works with an open internet link, but areas previously viewed are archived and available for offline viewing. This makes GoogleHunt suitable for use in realtime mobile hunts, when an internet link is not available.

  • Free GoogleHunt "map plotting" display program
  • Uses ( free / popular ) GoogleEarth viewer for a display window
  • Automatic or manual operation
  • Accepts standard $GPRMC NMEA GPS message
  • Accepts standard Agrello DF messages
  • Archive hunt files are auto-saved




    DoppSite Doppler Website Program : FREE / US$ 99

    DoppSite is a Doppler website program that enables remote internet viewing of a PicoDopp ( base station ) DF, on a GoogleEarth display. DoppSite can drive multiple displays, and each display can plot multiple DoppSites, so complete DF "networks" can be created.

    The free DEMO version of DoppSite ( available here for download ) has user-defined station lat / long and a simulation mode, but "paints" a DF bearing line only 1 mile long. It allows DF website creation / testing, with zero cost.

    The STANDARD version ( 20 mile bearing line ) is available ONLY by e-mail request, with fixed station lat / long. ( customer specified ) It is available free to PicoDopp purchasers, or for US$ 99 to others.

    Both DoppSite versions accept a PicoDopp RS232 output, and can be used to create fully functional DF networks, with automatic updates as fast as once per second.

  • Free / US$ 99 internet DF display program
  • Includes a simulation mode ( no DF required for test / eval )
  • Uses GoogleEarth display, internet linked
  • Accepts PicoDopp RS232 messages




    WinDopp IBM PC / Windows Display Program : FREE

    The WinDopp IBM PC / Windows display program is a Windows display program for the PicoDopp DF. It has a simulation mode that allows it to be used without a DF input... you can download it and run it now. If a GPS reciever is provided, the WinDopp program uses the GPS heading to stabilize the azimuth display, which fully enables the signal integration features of the program.

    WinDopp uses an RS232 COM port 1 - 8 ( or USB port with user-provided adapter ) and selectable baud rates, 1200 to 9600. Standard Agrello DF message allows use with other DF units. User defined color scheme and COM settings are saved on exit, selectable GPS or manual heading inputs. Includes 3 quasi-DSP features to enhance the display and assist identification of signal direction.

    Written in VisualBasic 6.0, source code available on request.

  • Free WinDopp IBM PC display program
  • Includes a simulation mode ( no DF required )
  • Uses RS232 COM port ( 1 - 8 )
  • USB operation with user-provided adapter
  • Accepts standard Agrello DF messages
  • Accepts PicoDopp GPS data for heading
  • Provides visual integration of multiple DF bearings
  • Three quasi-DSP functions to enhance display
  • Five memory slots to store / recall displays
  • User-defined color scheme, saved on exit

More WinDopp Info



Download it now !
( 1.5 Mbyte, zipped )




    PicoDopp IBM PC / MsDOS Display Program : FREE

    This is the original ( free ) PicoDopp MsDOS display program for IBM PCs. It has a simulation mode that allows it to be used without a DF input... you can download it and run it now.

    The program uses the RS232 COM1 or COM2 ports, selectable baud rates. Standard Agrello DF message allows use with other DF units. An MsDOS program with monochrome display, to run on the widest vareity ( and oldest ) of computers. Includes 3 quasi-DSP features to enhance the display and assist identification of signal direction.

    Written in QuickBasic 4.0, source code available on request.

  • Free PicoDopp IBM PC display program
  • Includes a simulation mode ( no DF required )
  • Uses COM1 or COM2 RS232 ports
  • Accepts standard Agrello DF messages
  • Provides visual integration of multiple DF bearings
  • Three quasi-DSP functions to enhance display
  • Ten memory slots to store / recall displays




Download it now !
( 86 Kb MsDOS .EXE file )
    PicoDopp PalmOS PDA Display Program : FREE

    This is a ( free ) PicoDopp display program that runs on any PDA that uses the ( very popular ) Palm Operating System. ( "PalmOS", ver. 3.5 or later ) It uses the infrared port on the PDA, to provide a cordless / handheld Doppler display, similar to the IBM program.

    NOTE: Not all available models of PDAs have been tested for proper IR operation. ( see link below picture )

    Not as many features as the IBM program, but very worthwhile. Laptop IBM computers ( for a mobile display ) can cost US$ 1000 and up, but PDAs can be purchased ( new ) starting at about US$ 120.

  • Free PicoDopp display program for PalmOS PDAs
  • Includes a simulation mode
  • Infrared input for cordless / handheld operation




Download it now !
( 2 PalmOS .PRC files )
( zipped : 66 Kb )
    FoxPlot PDA DF Plotting Program : FREE

    This is a ( free ) DF plotting "utility" program for PalmOS PDAs. It plots up to 9 DF bearings on a ( featureless ) map, to show where the DF lines intersect. Data is manually entered as latitude, longitude and DF bearing for each location.

  • Free FoxPlot PDA DF plotting program
  • Holds / displays up to 9 DF locations and bearings
  • Range 100 feet to 100 miles
  • Lat/Long readout of screen center
  • Touch-sensitive screen to scroll display
  • DF data stored in a ( non-volatile ) PDA file




Download it now !
( 2 PalmOS .PRC files )
( zipped : 69 Kb )
    Yahoo! / PicoDopp : Public Forum about the PicoDopp DF

    The Yahoo ! / PicoDopp public forum is a message board where people can discuss the PicoDopp DF.

    Created in October 2005, over 30 members enrolled in the first 2 weeks, most of them PicoDopp owners and users. Open to the public, a good place to get alternative opinions or advice about the PicoDopp, or exchange ideas and information about PicoDopp enhancements, such as LAN connections, modified display programs, etc.

    Messages can be viewed without joining the group. To post a message, Yahoo ! enrollment is required, but it is automatic, fast and free. If / when you join the group, please "announce" yourself, state your general location and your application for the PicoDopp, and any questions you might have.

    The PHOTOS section presently ( Oct 2005 ) has some screen shots of one alternative display program with a satellite background image, from an Australian amateur.

  • View messages without joining
  • Free / fast enrollment to post a message
  • Get alternative PicoDopp opinions / ideas
  • Identify others with similar PicoDopp interests
  • Identify nearby PicoDopp users

visit Yahoo ! / PicoDopp forum




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