FEATURES :
• 8 selectable ID codes, "MO", "MOE", "MOI", "MOS", "MOH", "MO5", "MON", "MOD".
• For 1 minute, it continuously sends the selected ID code at 8 WPM and terminates by a fast "DE hider's call letters".
• 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 for practice.
• Delayed start up to 3 1/2 hour, in 1/2 hour increment, all FOXES can be synchronized by a single PB.
• High accuracy timing.
• MCW for 2 meters, straight key CW for 80 meters.
• Keys HTs and positive PTT transmitters.
• The Hider's call letters can be loaded in the EEDATA memory permanantly and changed just by setting switches.
• Power consumption is less than 3 mA.
• The indicating LED shows 1- Delayed start timing, 2- Incorrect combination of time and # of FOXES, 3- CW keying being done.


IMPROVED SOFTWARE:

• 1 Second of dead time between each transmission.
• 8 Seconds of time for the call letters and the portable sign.
• Pre-keying of the TX 1 second before the start of the ID.
• Written in "C" for ease of modification.
• A version is availlable for the PIC16F84A, one for the lower cost PIC16F628. Both microprocessors can be interchanged with the proper software. The PIC16F628 cost less than 4$US in unit quantity from DK.

Information text on the FoxBox.
Schematic diagram of the International Hunt FOX BOX.   (33K) GIF
        In V3, R5 is removed from pin 18 and placed on pin 17 of the PIC, this mod is required
        to eleminate a glitch while timing the delayed start on an 80 meter Fox.
Schematic of the synchronizing cable.    GIF
Parts list.
Location of the components on the PCB. (32K) GIF

I have a version that plugs in a GE Master Exec II exiter for 350 mW of output. This exiter only requires a Xtal and retuning.