Kenwood_IF-10D_sch.pdf

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1、10 10 10 10 10 10 10K10K 10K10K RTS fm Radio TXD fm Radio CTS to Radio RXD to Radio CTS to Computer RXD to Computer RTS fm Computer TXD fm Computer +5 +5 +5 +5 1 3 5 9 6 8 2 4 10 uH 10 uH Kenwood TS-50 HF Transceiver Computer InterfaceIF-10D module for This is the entire circuit of the (expensive an

2、d now-discontinued) Kenwood IF-10D interface for the TS-50 transceiver. It inverts TTL-level data from the radios digital control board to the “half-RS232” output seen at the 5-pin DIN computer-control connector of other Kenwood transceivers. The four inverters are 4/6ths of a 74LS04 TTL hex inverte

3、r. The device is packaged in a metal box with the same 5-pin DIN connector seen on the rear panels of larger Kenwood radios. A 7” pigtail with a 6-contact high-density miniature connector mates with the radio motherboard through a hole on the underside of the TS50. Although Kenwood recommends that you then use their IF-232 interface to convert from 0V/+5 V to true -12V/+12V RS-232 levels, most PC serial ports will work with this interface as-is. The main advantage of the IF-232 is ground isolation - their interface incorporates opto-isolators. Stephen H. Smithwa8lmf 4 December 2003