Tracking Transmitter Kit Selection Guide

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XFM1 Tracking Transmitter Kit

Frequency   147.455 147.460 Mhz - Crystal controlled.  2 meter ham band
Mode   FM
Transmission 15 beeps followed by call sign or "XFM1" in Morse code
Size   2x5/8
Antenna   12 inch, can be coiled
Weight 8 grams (0.3 oz) includes batteries
Battery life (using 2 BR1632 batteries)   4 days
Ground Range with counterpoise   1200 feet (5 feet above ground)
Air range   many miles (depends on receiver, antenna and altitude)
Use   Model rocket, model aircraft, balloons, wild life locating
Receiver   2-meter (144 148 MHz) receiver with at least 0.16 micro volts sensitivity
Receiver Antenna   directional antenna recommended but not required.
Other   Knowledge of radio direction finding
Other   standard through-the-hole components
Kit available, order XFM1
Free plans click here

4

 

FM108K Beeping Tracking Transmitter Kit

Frequency

 105MHz to 108 MHz adjustable

Mode

 FM

Transmission beeps

Size

 2.75 x 0.5

Weight

 16.3 grams (0.6 oz) includes battery

Battery life (using 23A battery)

 5 hours

Range without counterpoise (5 feet above ground)

 300 feet

Range with counterpoise (5 feet above ground)

 1320 feet (Air to ground ranges of a mile have been reported)

Receiver

 common FM broadcast band FM radio or VHF2 receiver

  *All range tests done with VHF1 receiver

Use

 Model Rocket and model aircraft locating

Other

 standard through-the-hole components

Kit available, order FM108K

Free plans click here

FM108KS small Beeping Tracking Transmitter Kit

Frequency

 105MHz to 108 MHz adjustable

Mode

 FM

Transmission beeps

Size

 1.5 x 0.5

Weight

 10 grams (0.4 oz)

Battery life (using 23A battery)

 5 hours

Range without counterpoise (5 feet above ground)

 300 feet

Range with counterpoise (5 feet above ground)

 1320 feet (air to ground ranges of a mile have been reported)

Receiver

 common FM broadcast band FM radio or VHF2 receiver

  *All tests done with VHF1 receiver

Use

 Model Rocket and model aircraft locating

Other

 same as FM108 except has one surface mounted IC and two resistors mounted on foil side of board

Kit available, order FM108K

Free plans click here

M15m Tracking Transmitter

Frequency  147.460 +or- .005 MHz
Mode  On-Off Carrier (OOC or CW)
Transmission  carrier on and off every to 1 second
Size  0.7 x 0.6
Weight  6.5grams (.23oz) including battery
Range (ground)  400 yards with counterpoise
Frequency control  Crystal (inexpensive computer crystal)
Battery life  30 days (#394, 1.5 volt silver oxide watch battery)
Receiver /requirements  144.455 - 147.460 MHz., 0.16microvolts sensitivity or better. CW mode required
Receiver Antenna  directional antenna recommended but not required.
Other  Knowledge of radio direction finding
   
Free plans  

 

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jerry_baumeister@msn.com

Copyright ,Jerry Baumeister
1-21-2006