FEATURES :
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8 selectable ID codes, "MO", "MOE", "MOI", "MOS",
"MOH", "MO5", "MON", "MOD".
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For 1 minute, it continuously sends the selected
ID code at 8 WPM and terminates by a fast "DE hider's call letters".
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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.
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Delayed start up to 3 1/2 hour, in 1/2 hour increment,
all FOXES can be synchronized by a single PB.
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High accuracy timing.
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MCW for 2 meters, straight key CW for 80 meters.
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Keys HTs and positive PTT transmitters.
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The Hider's call letters can be loaded in the EEDATA
memory permanantly and changed just by setting switches.
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Power consumption is less than 3 mA.
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The indicating LED shows 1- Delayed start timing,
2- Incorrect combination of time and # of FOXES, 3- CW keying being done.
IMPROVED SOFTWARE:
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1 Second of dead time between each transmission.
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8 Seconds of time for the call letters and the portable
sign.
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Pre-keying of the TX 1 second before the start of
the ID.
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Written in "C" for ease of modification.
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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
PCB V 3. (73K) 300 dpi GIF image.
The PCB is also available from FAR
CIRCUITS.
Download the source code in C and Hex file ctrsoft.zip
It is for ham radio operators only.
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.