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Fox V3 fully compatible with International
Hunts in zone 2 (ARDF).
Hardware by Jacques VE2EMM.
Software by Francois VE2JX and Jacques VE2EMM.
Special thanks to Joe Leggio WB2HOL and Doug Reed N0NAS.
This project is free for non commercial use by Ham radio
8 selectable ID codes, "MO", "MOE", "MOI", "MOS", "MOH", "MO5", "MON",
For 1 minute, it continuously sends the selected ID code at 8 WPM and terminates
by a fast "DE hider's call
Cycle times are: continuous to 7 minutes, depending on the numbers of FOXES
in the hunt. 5 FOXES and 5
minutes is the international standard. More or less FOXES can be used
Delayed start up to 3 1/2 hour, in 1/2 hour increment, all FOXES can be
synchronized by a single PB.
The Hider's call letters can be loaded in the EEDATA memory permanantly
and changed just by setting switches.
The indicating LED shows 1- Delayed start timing, 2- Incorrect combination
of time and # of FOXES, 3- CW
keying being done.
Small size, 2.5" X 2.75".
Power consumption is 12 mA while timing and 180 mA while transmitting from
Power output on 2 Meters is at least 0.8 Watt, it can be increased to over
18 to 18.5 mHz fundamental Xtal (8 times multiplication), FM modulation.
Uses only a few semiconductors, an ICS501 LOCO MicroClock, 2 transistor,
a PIC controller and a 78M05 voltage regulator.
Montreal Fox TOP VIEW
Montreal Fox BOTTOM VIEW
SOLDERING SURFACE MOUNT DEVICES
1- Using a very small soldering iron tip,
put a small quantity of solder on a corner pad.
2- Position the device carefully with pair
3- Solder that corner pin while maintaining the alignment
of the device on all the pads.
4- Solder the rest of the pins with a very small
amount of solder.
Spectrum analysis of the Fox output (46K).
Features and operation text. V 3 includes elemination
of key clicks.
Parts list V 3 Get
information on the availlability of the ICS501 from ICS.
Info from Phil Barnes-Roberts AD6PQ: "I got the ICS parts from
You can buy the FET from http://www.jdr.com
Use a PIC16F628 for all new construction, it cost less and is a better
The Source code and Hex file for both the PIC16F628 and the PIC16F84
are graciously available to ham radio operators only501fox.zip.
All material on this page is distributed on a
WYSIWYG basis and as such I can't take any responsibility for the use of
this design and its results. However in saying this it must also be mentioned
that every effort has been taken to ensure that it as error free
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Many thanks to Al Waller K3TKJ for graciously hosting my web pages