The Montreal 525 Fox V1.2  fully compatible with International Hunts in zone 2 (ARDF).

WARNING :
THIS PORJECT IS ONLY FOR THE BRAVES WITH A SOLDERING IRON

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 operators only.

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• 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.
• MCW.
• 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 12 Volts.
• Power output on 2 Meters is at least 0.8 Watt, it can be increased to over 1 watt.
• FM modulation.
• Uses any fundamental Xtal above 5 mHz.
• Output frequency; any 2 meters frequency. (Use the ICS525 caculator of the Web to select which legs to ground)
• Has only a few semiconductors, an ICS525 OSCaR User Configurable Clock, 1 transistor, a PIC controller and a 78M05 voltage regulator.

WARNING

• The ICS525 is a surface mount IC. It is a 28 pins narrow SSOP package, that is; 28 pins in a box of .4" X .15".

The Legs spacing is .025" center to center.
Can you solder it? With a good hand, it can be done. It has been done 8 times.

SOLDERING SURFACE MOUNT DEVICES

Using a very small soldering iron tip, put a small quantity of solder on a corner pad.

Position  the device carefully with pair of tweezers.

Solder that corner pin while maintaining the alignment of the device on all the pads.

Solder the rest of the pins with a very small amount of solder.

Features and operation text.

Give your Xtal frequency and your operating frequency to ICS, they you will tell you which pins have to be grounded on the ICS525.

Construction text.

Parts list V 1.2

Get information on the availlability of the ICS525 from ICS.
I purchased mine from Electro Sonic Inc. in Toronto Can.  (Shop as a guest, search for "ICS525-01R")
Info from Phil Barnes-Roberts AD6PQ: "I got the ICS parts from    http://www.nuhorizons.com/ "

Use a PIC16F628 for all new construction, it cost less and is a better performer.

• mf525sce.gif   (90K)  Schematic diagram V 1.2 of the Montreal 525 Fox.
• Schematic of the synchronizing cable.
 
• Parts location.
• PCB drawing.   The PCB is also available from Fred at Farr Circuits.
• The Source code and Hex file for both the  PIC16F628 and the PIC16F84 are graciously available to ham radio operators only 525fox.zip.