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| Two
Transistor Reflex Radio |
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Transistors: BC109C |
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L1/L2
are the antenna coils |
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If you can't find a 1mH coil (often called a "choke") you
can make one by simply winding about 1 metre of thin wire
around a piece of match-stick (or something similar). |
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N.B. |
Solder the resistors first, then the capacitors, then the
coil, then finally, the diode and transistors. This
reduces the risk of damage to transistors and diode
through overheating. |
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Printed Circuit Board :
Copper
side (magnified) |
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Printed Circuit Board :
Component side (magnified) |
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Long Wave Antenna Connections |
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Top of the Page |
© David Hoult 2009
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The
Open Door Web Site 