Mini Fm transmitter

364

04:48:41

Range up to 1000m if powered by 24v
The coil is flat on the board and got 4 windings. 
The adjustable capacitor got 20pF.
The antenna is just a 70cm cable.
Consider that the post will be able to pin point your location within 15 min.

I once did build it some quarter century ago.
Enjoy

published 10 years ago

hurz

10 years ago

4 windings for 1mH is very interessting. Also for 20pH... so what changed within the last quarter century for this strange L values?

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