Description

Product information:

Use 3.6v lithium battery

USB charging

Support audio output Support 3.5mm headphone

Support 8 ohm speakers 1w

FM output supports headphone antenna

Using BNC Antenna Interface

The pcb retains the si4735 package, the user can replace the chip by himself, and the software is compatible

Size：88x88x38mm

Features of this sketch:

1) fm, am (MW and SW) and SB (LSB and USB);

2) 0.5, 1, 1.2, 2.2, 3 and 4khz audio bandwidth filters;

3) 22 pre-configured commercial radio and ham bands;

4) bfo control; and

5) Frequency step switch (at 1, 5 and 10kHz);

bands[] = {

{Fm_band_type, 8400, 10800, 10430, 10},

{Lw_band_type, 100, 510, 300, 1}, {Mw_band_type,

520, 1720, 810, 10},

{Sw_band_type, 1720, 3500, 1900, 1}, // 160 meters

{Sw_band_type, 3500, 4500, 3700, 1}, // 80 meters

{Sw_band_type,

4500, 5500, 4850, 5},

{Sw_band_type, 5500, 6300, 6000, 5}, {Sw_band_type,

6300, 7800, 7050, 5}, //40m {Sw_band_type, 7800, 10000, 9600, 5},

{Sw_band_type, 10000, 11000, 10100, 1}, // 30 meters

{Sw_band_type, 11000, 12500, 11940, 5},

{Sw_band_type, 12500, 13900, 13600, 5}, {Sw_band_type,

13900, 14500, 14270, 1}, // 20m

{Sw_band_type, 14500, 15900, 15300, 5},

{Sw_band_type, 15900, 17900, 17600, 5},

{Sw_band_type, 17900, 18300, ??18100, 1}, // 17m

{Sw_band_type, 18300, ?? 21900, 21200, 1}, // 15m

{Sw_band_type, 21900, 26200, 24940, 1}, // 12 meters

{Sw_band_type, 26200, 27900, 27500, 1}, // cb band (11m)

{Sw_band_type, 27900, 30000, 28400, 1} //; // 10 meters