OZ4HZ APRS Tracker components datasheets (in pdf):  AT89C4051 microcontroller with 4KB flash and 128 Bytes of RAM  AT89S4051 microcontroller with 4KB flash and 256 Bytes of RAM  AT24C02A I2C EEPROM 256*8 bit  ADP3000 step up step down switching regulator or       LT1173 step up step down switching regulator  BYV10-40 Schottky barrier diode  IRFU9024N P-channel switching Hex Fet  IRLML6104 P-channel switching Hex Fet  BC549 NPN transistor  BC559 PNP transistor  OKW enclosure for the tracker GPS datasheets (in pdf):  BR304 Serial GPS unit (discontinued)  Link to more info on BR304 GPS (Danish site most info in danish)  BR355 serial GPS unit (replacement of BR304)  More info on Sirf3 chipset used in BR355 Additional datasheets for the TXtracker (in pdf) :  RA08H1317M 7W PA module  BBY40 Capacitance diode  BA595 RX/TX Switching diode  BFS17A RF transistor  30BQ040 Schottky barrier diode  NEOSID 7S coil  NEOSID HEM SMD coil  TOKO coils  EPCOS SMD chokes  BNC connector for PCB  Various mecanical parts  Fuseholder clips  OKW enclosure for the TXtracker (Height = 57.4 mm) can also be used for a TXtracker with NIMH batteries Home