The UTX-80 is a micro transmitter designed for FoxOring ARDF or for practice / demo purposes.
Notes:
The transformer L1 type and ratio is not critical. T50-6 toroid is used here but (eg.) a T50-2 would be equally suitable.
A ratio of 1:10 to 1:20 is suggested. Experimenting with winding ratios with your preferred antenna length will likely deliver increased output.
A unique letter (A-Z) is sent by each TX, this will enable the competitor to separate TXs if
more than can be heard at ant one time.
The 30 seconds on/off mode is the recommended transmission format for UK FoxOring
The box is a standard 200ml sealed food container
The fixing holes should be drilled on the centerline of the BOX. The PCB will then be offset
from the centerline of the BOX, giving space for the PP3 battery.
Use a 250mm length of aluminum edging angle as the ground/fixing stake fixed
through the same mounting holes.
A 500mm antenna will ensure the TX is audible using a PJ80 at 100m.
