MDT Construction Manual – Issue 2
Page 28
Step 15: Coils
Count turns on the inside of the toroid. A turn is considered to be counted when a wire passes
through the center hole.
Transformer T1
Take a 120 mm length of 0.4mm
enamelled copper wire. Wind
4
turns on a
FT37-43
ferrite toroid. This is winding 1.
Take a 180 mm length of 0.4mm
enamelled copper wire. Wind
8
turns on
the ferrite toroid. This is winding 2.
Take a 120 mm length of 0.4mm
enamelled copper wire. Wind
4
turns on
the ferrite toroid. This is winding 3.
Scrape the enamel off the ends of the
wires and tin with solder before installing
in the PCB.
The winding direction is not important.
Transformers T2
Take a 180mm length of 0.4mm enamelled
copper wire and wind the
8
turn primary
on a
FT37-43
ferrite toroid.
Take a 90mm length of 0.4mm enamelled
copper wire and wind the
2
turn
secondary.
Scrape the enamel off the ends of the
wires and tin with solder before installing
in the PCB.
The winding direction is not important.
Summary of Contents for MDT
Page 1: ...MDT Construction Manual Issue 2 Page 1 MDT DSB TRANSCEIVER CONSTRUCTION MANUAL ...
Page 8: ...MDT Construction Manual Issue 2 Page 8 5 MDT BLOCK DIAGRAM Figure 3 MDT Block diagram ...
Page 12: ...MDT Construction Manual Issue 2 Page 12 Figure 4 Carrier oscillator ...
Page 13: ...MDT Construction Manual Issue 2 Page 13 Figure 5 Mixer ...
Page 14: ...MDT Construction Manual Issue 2 Page 14 Figure 6 Microphone Amplifier ...
Page 15: ...MDT Construction Manual Issue 2 Page 15 Figure 7 Transmit ...
Page 16: ...MDT Construction Manual Issue 2 Page 16 Figure 8 Receive Audio ...
Page 32: ...MDT Construction Manual Issue 2 Page 32 Figure 20 Component overlay ...