300 mWatts FM broadcast transmitter (87,5-108 MHz), 50kHz stepsize, dual-speed.
(Hartley oscillator version)

All component values are drawn on the .comp and .silklayer bitmaps, with the following
exceptions;

1.- mount a 10pF (1206 SMD-chip capacitor) between the base and collector of BC547 
    (this is the 'switch' transistor in the loopfilter section).
2.- L1 = 4.5 turns, 6 mm diameter, 1 mm CuAg, tap ¾ to 1 turn from ground (spaced)
3.- Cx = 3n9 (50µS) or 4n7 (75µS)
4.- JP1 = 2 pins header + jumper
5.- all 1uH and 0,1uH coils are ready-made molded type coils.


Notes

(*) not used
CuAg = silver plated copper wire
CuL = magnetwire, enameled copper wire
(Note: 1 mm CuL approx. equals to AWG18
         0,3 mm approx. equals to AWG28)
(I) all diameters are measured from the inside of the coils

The green led indicates if the PLL is locked
The red led indicates if the PLL is not locked

(C)2005 Helix Inc. The Netherlands.

