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 | 2”x5/8” |
| 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 |
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 |
M15m Tracking Transmitter
| Frequency | 147.460 +or- .005 MHz |
| Mode | On-Off Carrier (OOC or CW) |
| Transmission | carrier on and off every ½ 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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Copyright ©,Jerry Baumeister
1-21-2006