APPLICATION INFORMATION (continued)

Figure 14. Low cost 27 MHz receiver

Figure 17. Low cost 27 MHz receiver with external xtal oscillator

Figure 15. L2 Oscillator coil

Figure 16. L1 Antenna Coil

Coil support: Toko 10K

Primary winding: 10 Turns of enamelled cop-

per wire 0.16 mm diameter (pins 3-1).

Secondary winding: 4 Turns copper wire

0.16 mm diameter (pins 6-4)

Coil support: Toko 10K

Primary winding: as L2 (pins 3-1)

Secondary winding: 2 Turns copper wire

0.16 mm diameter (pins 6-4)

13/18

TDA1220B