
APPENDIX H - Modifying Wireless
Mics to become trackers
The MLD’s microphone assembly consists of a small ultrasonic microphone, a filter and
a mini-XLR plug. Looking into the mini XLR connector that plugs into the radio we
need:
1
2
3
1: Ground
2: Supply Voltage (9v)
3: Signal In
Here we will use the Samson VLXTD wireless system as an example. Pin #2 is
connected to +9v on the radios. The only thing between it and the battery is the power
switch. The tricky thing is we have to bypass a 15k current-limiting resistor. Normally,
the schematic is like this:
Radio
Connector
Connector
Filter
+9v
switch
pin #2
15k Resistor
Ground
pin #1
Signal In
pin #3
It has to be modified as follows:
Radio
Connector
Connector
Filter
+9v
switch
pin #2
Ground
pin #1
Signal In
pin #3
For the modification you will need a small phillips screwdriver, a soldering iron, a bit of
solder and a voltmeter. It might help to see a modified radio as a reference.
1. Take the back off the beltpack transmitter by removing the 4 phillips screws. Two of
them are located inside the battery compartment.
MLD manual 1.1
Page 99
Содержание LIGHTING DIRECTOR
Страница 6: ...Page 6 MLD manual 1 1...
Страница 18: ...Page 18 MLD manual 1 1...
Страница 28: ...Page 28 MLD manual 1 1...
Страница 64: ...Page 64 MLD manual 1 1...
Страница 70: ...Page 70 MLD manual 1 1...
Страница 98: ...Page 98 MLD manual 1 1...